Phylogenetic Analyses of Armillaria Reveal at Least 15 Phylogenetic Lineages in China, Seven of Which Are Associated with Cultivated Gastrodia elata
Identifieur interne : 000122 ( Pmc/Corpus ); précédent : 000121; suivant : 000123Phylogenetic Analyses of Armillaria Reveal at Least 15 Phylogenetic Lineages in China, Seven of Which Are Associated with Cultivated Gastrodia elata
Auteurs : Ting Guo ; Han Chen Wang ; Wan Qiu Xue ; Jun Zhao ; Zhu L. YangSource :
- PLoS ONE [ 1932-6203 ] ; 2016.
Abstract
Fungal species of
Url:
DOI: 10.1371/journal.pone.0154794
PubMed: 27138686
PubMed Central: 4854404
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PMC:4854404Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Phylogenetic Analyses of <italic>Armillaria</italic> Reveal at Least 15 Phylogenetic Lineages in China, Seven of Which Are Associated with Cultivated <italic>Gastrodia elata</italic></title><author><name sortKey="Guo, Ting" sort="Guo, Ting" uniqKey="Guo T" first="Ting" last="Guo">Ting Guo</name><affiliation><nlm:aff id="aff001"><addr-line>Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Heilongtan, Kunming 650201, China</addr-line></nlm:aff></affiliation><affiliation><nlm:aff id="aff003"><addr-line>University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China</addr-line></nlm:aff></affiliation></author><author><name sortKey="Wang, Han Chen" sort="Wang, Han Chen" uniqKey="Wang H" first="Han Chen" last="Wang">Han Chen Wang</name><affiliation><nlm:aff id="aff002"><addr-line>College of Life Sciences, Chongqing Normal University, Chongqing, 401331, China</addr-line></nlm:aff></affiliation></author><author><name sortKey="Xue, Wan Qiu" sort="Xue, Wan Qiu" uniqKey="Xue W" first="Wan Qiu" last="Xue">Wan Qiu Xue</name><affiliation><nlm:aff id="aff002"><addr-line>College of Life Sciences, Chongqing Normal University, Chongqing, 401331, China</addr-line></nlm:aff></affiliation></author><author><name sortKey="Zhao, Jun" sort="Zhao, Jun" uniqKey="Zhao J" first="Jun" last="Zhao">Jun Zhao</name><affiliation><nlm:aff id="aff004"><addr-line>General Station of Forest Pest Control, State Forestry Administration, Shenyang 110034, China</addr-line></nlm:aff></affiliation></author><author><name sortKey="Yang, Zhu L" sort="Yang, Zhu L" uniqKey="Yang Z" first="Zhu L." last="Yang">Zhu L. Yang</name><affiliation><nlm:aff id="aff001"><addr-line>Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Heilongtan, Kunming 650201, China</addr-line></nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">27138686</idno><idno type="pmc">4854404</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4854404</idno><idno type="RBID">PMC:4854404</idno><idno type="doi">10.1371/journal.pone.0154794</idno><date when="2016">2016</date><idno type="wicri:Area/Pmc/Corpus">000122</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Phylogenetic Analyses of <italic>Armillaria</italic> Reveal at Least 15 Phylogenetic Lineages in China, Seven of Which Are Associated with Cultivated <italic>Gastrodia elata</italic></title><author><name sortKey="Guo, Ting" sort="Guo, Ting" uniqKey="Guo T" first="Ting" last="Guo">Ting Guo</name><affiliation><nlm:aff id="aff001"><addr-line>Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Heilongtan, Kunming 650201, China</addr-line></nlm:aff></affiliation><affiliation><nlm:aff id="aff003"><addr-line>University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China</addr-line></nlm:aff></affiliation></author><author><name sortKey="Wang, Han Chen" sort="Wang, Han Chen" uniqKey="Wang H" first="Han Chen" last="Wang">Han Chen Wang</name><affiliation><nlm:aff id="aff002"><addr-line>College of Life Sciences, Chongqing Normal University, Chongqing, 401331, China</addr-line></nlm:aff></affiliation></author><author><name sortKey="Xue, Wan Qiu" sort="Xue, Wan Qiu" uniqKey="Xue W" first="Wan Qiu" last="Xue">Wan Qiu Xue</name><affiliation><nlm:aff id="aff002"><addr-line>College of Life Sciences, Chongqing Normal University, Chongqing, 401331, China</addr-line></nlm:aff></affiliation></author><author><name sortKey="Zhao, Jun" sort="Zhao, Jun" uniqKey="Zhao J" first="Jun" last="Zhao">Jun Zhao</name><affiliation><nlm:aff id="aff004"><addr-line>General Station of Forest Pest Control, State Forestry Administration, Shenyang 110034, China</addr-line></nlm:aff></affiliation></author><author><name sortKey="Yang, Zhu L" sort="Yang, Zhu L" uniqKey="Yang Z" first="Zhu L." last="Yang">Zhu L. Yang</name><affiliation><nlm:aff id="aff001"><addr-line>Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Heilongtan, Kunming 650201, China</addr-line></nlm:aff></affiliation></author></analytic><series><title level="j">PLoS ONE</title><idno type="eISSN">1932-6203</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Fungal species of <italic>Armillaria</italic>, which can act as plant pathogens and/or symbionts of the Chinese traditional medicinal herb <italic>Gastrodia elata</italic> (“Tianma”), are ecologically and economically important and have consequently attracted the attention of mycologists. However, their taxonomy has been highly dependent on morphological characterization and mating tests. In this study, we phylogenetically analyzed Chinese <italic>Armillaria</italic> samples using the sequences of the internal transcribed spacer region, translation elongation factor-1 alpha gene and beta-tubulin gene. Our data revealed at least 15 phylogenetic lineages of <italic>Armillaria</italic> from China, of which seven were newly discovered and two were recorded from China for the first time. Fourteen Chinese biological species of <italic>Armillaria</italic>, which were previously defined based on mating tests, could be assigned to the 15 phylogenetic lineages identified herein. Seven of the 15 phylogenetic lineages were found to be disjunctively distributed in different continents of the Northern Hemisphere, while eight were revealed to be endemic to certain continents. In addition, we found that seven phylogenetic lineages of <italic>Armillaria</italic> were used for the cultivation of Tianma, only two of which had been recorded to be associated with Tianma previously. We also illustrated that <italic>G</italic>. <italic>elata</italic> f. <italic>glauca</italic> (“Brown Tianma”) and <italic>G</italic>. <italic>elata</italic> f. <italic>elata</italic> (“Red Tianma”), two cultivars of Tianma grown in different regions of China, form symbiotic relationships with different phylogenetic lineages of <italic>Armillaria</italic>. 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<front><journal-meta><journal-id journal-id-type="nlm-ta">PLoS One</journal-id><journal-id journal-id-type="iso-abbrev">PLoS ONE</journal-id><journal-id journal-id-type="publisher-id">plos</journal-id><journal-id journal-id-type="pmc">plosone</journal-id><journal-title-group><journal-title>PLoS ONE</journal-title></journal-title-group><issn pub-type="epub">1932-6203</issn><publisher><publisher-name>Public Library of Science</publisher-name><publisher-loc>San Francisco, CA USA</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">27138686</article-id><article-id pub-id-type="pmc">4854404</article-id><article-id pub-id-type="doi">10.1371/journal.pone.0154794</article-id><article-id pub-id-type="publisher-id">PONE-D-15-44992</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Biology and Life Sciences</subject><subj-group><subject>Evolutionary Biology</subject><subj-group><subject>Evolutionary Systematics</subject><subj-group><subject>Phylogenetics</subject></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Biology and Life Sciences</subject><subj-group><subject>Taxonomy</subject><subj-group><subject>Evolutionary Systematics</subject><subj-group><subject>Phylogenetics</subject></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Computer and Information Sciences</subject><subj-group><subject>Data Management</subject><subj-group><subject>Taxonomy</subject><subj-group><subject>Evolutionary Systematics</subject><subj-group><subject>Phylogenetics</subject></subj-group></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Biology and Life Sciences</subject><subj-group><subject>Molecular Biology</subject><subj-group><subject>Molecular Biology Techniques</subject><subj-group><subject>Molecular Biology Assays and Analysis Techniques</subject><subj-group><subject>Phylogenetic Analysis</subject></subj-group></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Research and Analysis Methods</subject><subj-group><subject>Molecular Biology Techniques</subject><subj-group><subject>Molecular Biology Assays and Analysis Techniques</subject><subj-group><subject>Phylogenetic Analysis</subject></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Biology and Life Sciences</subject><subj-group><subject>Mycology</subject><subj-group><subject>Fungal Reproduction</subject><subj-group><subject>Fungal Spores</subject></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>People and Places</subject><subj-group><subject>Geographical Locations</subject><subj-group><subject>Asia</subject><subj-group><subject>China</subject></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Biology and Life Sciences</subject><subj-group><subject>Molecular Biology</subject><subj-group><subject>Molecular Biology Techniques</subject><subj-group><subject>Artificial Gene Amplification and Extension</subject><subj-group><subject>Polymerase Chain Reaction</subject></subj-group></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Research and Analysis Methods</subject><subj-group><subject>Molecular Biology Techniques</subject><subj-group><subject>Artificial Gene Amplification and Extension</subject><subj-group><subject>Polymerase Chain Reaction</subject></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Biology and life sciences</subject><subj-group><subject>Molecular biology</subject><subj-group><subject>Molecular biology techniques</subject><subj-group><subject>Sequencing techniques</subject><subj-group><subject>Sequence analysis</subject><subj-group><subject>DNA sequence analysis</subject></subj-group></subj-group></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Research and analysis methods</subject><subj-group><subject>Molecular biology techniques</subject><subj-group><subject>Sequencing techniques</subject><subj-group><subject>Sequence analysis</subject><subj-group><subject>DNA sequence analysis</subject></subj-group></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Biology and Life Sciences</subject><subj-group><subject>Evolutionary Biology</subject><subj-group><subject>Population Genetics</subject><subj-group><subject>Haplotypes</subject></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Biology and Life Sciences</subject><subj-group><subject>Genetics</subject><subj-group><subject>Population Genetics</subject><subj-group><subject>Haplotypes</subject></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Biology and Life Sciences</subject><subj-group><subject>Population Biology</subject><subj-group><subject>Population Genetics</subject><subj-group><subject>Haplotypes</subject></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Biology and Life Sciences</subject><subj-group><subject>Molecular Biology</subject><subj-group><subject>Molecular Biology Techniques</subject><subj-group><subject>Sequencing Techniques</subject><subj-group><subject>Sequence Analysis</subject></subj-group></subj-group></subj-group></subj-group></subj-group><subj-group subj-group-type="Discipline-v3"><subject>Research and Analysis Methods</subject><subj-group><subject>Molecular Biology Techniques</subject><subj-group><subject>Sequencing Techniques</subject><subj-group><subject>Sequence Analysis</subject></subj-group></subj-group></subj-group></subj-group></article-categories><title-group><article-title>Phylogenetic Analyses of <italic>Armillaria</italic> Reveal at Least 15 Phylogenetic Lineages in China, Seven of Which Are Associated with Cultivated <italic>Gastrodia elata</italic></article-title><alt-title alt-title-type="running-head">Phylogeny of <italic>Armillaria</italic></alt-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Guo</surname><given-names>Ting</given-names></name><xref ref-type="aff" rid="aff001"><sup>1</sup></xref><xref ref-type="aff" rid="aff003"><sup>3</sup></xref></contrib><contrib contrib-type="author"><name><surname>Wang</surname><given-names>Han Chen</given-names></name><xref ref-type="aff" rid="aff002"><sup>2</sup></xref><xref ref-type="corresp" rid="cor001">*</xref></contrib><contrib contrib-type="author"><name><surname>Xue</surname><given-names>Wan Qiu</given-names></name><xref ref-type="aff" rid="aff002"><sup>2</sup></xref></contrib><contrib contrib-type="author"><name><surname>Zhao</surname><given-names>Jun</given-names></name><xref ref-type="aff" rid="aff004"><sup>4</sup></xref></contrib><contrib contrib-type="author"><name><surname>Yang</surname><given-names>Zhu L.</given-names></name><xref ref-type="aff" rid="aff001"><sup>1</sup></xref><xref ref-type="corresp" rid="cor001">*</xref></contrib></contrib-group><aff id="aff001"><label>1</label><addr-line>Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Heilongtan, Kunming 650201, China</addr-line></aff><aff id="aff002"><label>2</label><addr-line>College of Life Sciences, Chongqing Normal University, Chongqing, 401331, China</addr-line></aff><aff id="aff003"><label>3</label><addr-line>University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China</addr-line></aff><aff id="aff004"><label>4</label><addr-line>General Station of Forest Pest Control, State Forestry Administration, Shenyang 110034, China</addr-line></aff><contrib-group><contrib contrib-type="editor"><name><surname>Klopfenstein</surname><given-names>Ned B.</given-names></name><role>Editor</role><xref ref-type="aff" rid="edit1"></xref></contrib></contrib-group><aff id="edit1"><addr-line>USDA Forest Service—RMRS, UNITED STATES</addr-line></aff><author-notes><fn fn-type="conflict" id="coi001"><p><bold>Competing Interests: </bold>The authors have declared that no competing interests exist.</p></fn><fn fn-type="con" id="contrib001"><p>Conceived and designed the experiments: TG ZLY. Performed the experiments: TG WQX. Analyzed the data: TG ZLY HCW. Contributed reagents/materials/analysis tools: TG HCW JZ. Wrote the paper: TG ZLY HCW.</p></fn><corresp id="cor001">* E-mail: <email>fungi@mail.kib.ac.cn</email> (ZLY); <email>higherfungi2005@aliyun.com</email> (HCW)</corresp></author-notes><pub-date pub-type="epub"><day>3</day><month>5</month><year>2016</year></pub-date><pub-date pub-type="collection"><year>2016</year></pub-date><volume>11</volume><issue>5</issue><elocation-id>e0154794</elocation-id><history><date date-type="received"><day>13</day><month>10</month><year>2015</year></date><date date-type="accepted"><day>19</day><month>4</month><year>2016</year></date></history><permissions><copyright-statement>© 2016 Guo et al</copyright-statement><copyright-year>2016</copyright-year><copyright-holder>Guo et al</copyright-holder><license xlink:href="http://creativecommons.org/licenses/by/4.0/"><license-p>This is an open access article distributed under the terms of the <ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution License</ext-link>, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.</license-p></license></permissions><self-uri content-type="pdf" xlink:href="pone.0154794.pdf"></self-uri><abstract><p>Fungal species of <italic>Armillaria</italic>, which can act as plant pathogens and/or symbionts of the Chinese traditional medicinal herb <italic>Gastrodia elata</italic> (“Tianma”), are ecologically and economically important and have consequently attracted the attention of mycologists. However, their taxonomy has been highly dependent on morphological characterization and mating tests. In this study, we phylogenetically analyzed Chinese <italic>Armillaria</italic> samples using the sequences of the internal transcribed spacer region, translation elongation factor-1 alpha gene and beta-tubulin gene. Our data revealed at least 15 phylogenetic lineages of <italic>Armillaria</italic> from China, of which seven were newly discovered and two were recorded from China for the first time. Fourteen Chinese biological species of <italic>Armillaria</italic>, which were previously defined based on mating tests, could be assigned to the 15 phylogenetic lineages identified herein. Seven of the 15 phylogenetic lineages were found to be disjunctively distributed in different continents of the Northern Hemisphere, while eight were revealed to be endemic to certain continents. In addition, we found that seven phylogenetic lineages of <italic>Armillaria</italic> were used for the cultivation of Tianma, only two of which had been recorded to be associated with Tianma previously. We also illustrated that <italic>G</italic>. <italic>elata</italic> f. <italic>glauca</italic> (“Brown Tianma”) and <italic>G</italic>. <italic>elata</italic> f. <italic>elata</italic> (“Red Tianma”), two cultivars of Tianma grown in different regions of China, form symbiotic relationships with different phylogenetic lineages of <italic>Armillaria</italic>. These findings should aid the development of Tianma cultivation in China.</p></abstract><funding-group><funding-statement>This study was financed by the National Natural Science Foundation of China (Nos. 30800006 and 31170024), the Chongqing Natural Science Foundation (No. CSTC, 2009BA5030), and the Key Laboratory for Plant Diversity and Biogeography of East Asia, KIB, Chinese Academy of Sciences (KLBB 201207). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.</funding-statement></funding-group><counts><fig-count count="4"></fig-count><table-count count="2"></table-count><page-count count="21"></page-count></counts><custom-meta-group><custom-meta id="data-availability"><meta-name>Data Availability</meta-name><meta-value>All relevant data are within the paper and its Supporting Information files. DNA accession numbers have been detailed in <xref ref-type="table" rid="pone.0154794.t001">Table 1</xref> of the manuscript.</meta-value></custom-meta></custom-meta-group></article-meta><notes><title>Data Availability</title><p>All relevant data are within the paper and its Supporting Information files. DNA accession numbers have been detailed in <xref ref-type="table" rid="pone.0154794.t001">Table 1</xref> of the manuscript.</p></notes></front><body><sec sec-type="intro" id="sec001"><title>Introduction</title><p>Fungal species of the genus <italic>Armillaria</italic> (Fr.: Fr.) Staude (Physalacriaceae, Agaricales, Basidiomycota) are well known as important plant pathogens that can cause serious root diseases on diverse trees and woody plants growing in plantations, forests and orchards worldwide, resulting in huge economic losses [<xref rid="pone.0154794.ref001" ref-type="bibr">1</xref>, <xref rid="pone.0154794.ref002" ref-type="bibr">2</xref>]. However, significant differences in pathogenicity have been observed among species of <italic>Armillaria</italic>. For example, <italic>A</italic>. <italic>ostoyae</italic> (Romagn.) Herink (= <italic>A</italic>. <italic>solidipes</italic> [<xref rid="pone.0154794.ref003" ref-type="bibr">3</xref>, <xref rid="pone.0154794.ref004" ref-type="bibr">4</xref>]) and <italic>A</italic>. <italic>mellea</italic> (Vahl) P. Kumm. are generally considered to be strongly pathogenic, whereas species such as <italic>A</italic>. <italic>sinapina</italic> Bérubé & Dessur., <italic>A</italic>. <italic>gallica</italic> Marxm. & Romagn. and <italic>A</italic>. <italic>cepistipes</italic> Velen. are considered less pathogenic [<xref rid="pone.0154794.ref002" ref-type="bibr">2</xref>]. Therefore, accurate species delimitation of <italic>Armillaria</italic> is critical for the assessment of disease risk.</p><p>Several species of <italic>Armillaria</italic> have been identified as symbionts of <italic>Gastrodia elata</italic> Bl. (“Tianma” in Chinese) and <italic>Polyporus umbellatus</italic> (Pers.) Fr., both being well known as important elements of traditional medicine in East Asia [<xref rid="pone.0154794.ref005" ref-type="bibr">5</xref>–<xref rid="pone.0154794.ref008" ref-type="bibr">8</xref>]. Based on data from the Ministry of Commerce, the output of fresh tubers of Tianma reached a record 14,873 tonnes in 2015, generating an annual production value up to $100 million USD (<ext-link ext-link-type="uri" xlink:href="http://www.gov.cn/xinwen/2015-07/22/content_2900532.htm">http://www.gov.cn/xinwen/2015-07/22/content_2900532.htm</ext-link>). The growth and maturation of Tianma, a heterotrophic perennial orchid with no leaves and roots, heavily rely on the presence of <italic>Armillaria</italic> partners [<xref rid="pone.0154794.ref009" ref-type="bibr">9</xref>]. It is well known that different strains of <italic>Armillaria</italic> can affect both the production and the quality of the tubers of Tianma [<xref rid="pone.0154794.ref009" ref-type="bibr">9</xref>, <xref rid="pone.0154794.ref010" ref-type="bibr">10</xref>]. Thus, screening the best <italic>Armillaria</italic> strains and assigning them to the correct taxa are particularly important for the cultivation of Tianma.</p><p>In the past 40 years, mating tests have been widely used in the taxonomy of <italic>Armillaria</italic>. Using these tests, 16 Chinese Biological species (CBS A to CBS P) of <italic>Armillaria</italic> have been identified [<xref rid="pone.0154794.ref011" ref-type="bibr">11</xref>, <xref rid="pone.0154794.ref012" ref-type="bibr">12</xref>]. However, mating tests rely on the availability of single-spore (haploid) isolates. This limits their use in the identification of samples collected as rhizomorphs, which are commonly associated with Tianma tubers. Furthermore, the results obtained from mating tests are sometimes ambiguous and inconclusive. The mating results are judged by the change in colony morphology. The reaction tends to be indistinct if the mating tests are performed on diploid–haploid or diploid–diploid pairings [<xref rid="pone.0154794.ref012" ref-type="bibr">12</xref>–<xref rid="pone.0154794.ref014" ref-type="bibr">14</xref>]. For example, in some pairings between Japanese homothallic isolates, unclear zone lines were observed, and the scenario also occurred that there was no pigmented line at the junction of the two isolates but the mycelia did not intermingle on either side [<xref rid="pone.0154794.ref015" ref-type="bibr">15</xref>].</p><p>In recent years, molecular data, specifically DNA sequence data, have been increasingly used to identify fungal species [<xref rid="pone.0154794.ref016" ref-type="bibr">16</xref>]. Taylor et al. [<xref rid="pone.0154794.ref017" ref-type="bibr">17</xref>] introduced the Genealogical Concordance Phylogenetic Species Recognition (GCPSR) as an objective way to define the limits of sexual species. Since their publication, numerous complexes of sibling species have been uncovered in fungi using the multilocus approach [<xref rid="pone.0154794.ref018" ref-type="bibr">18</xref>, <xref rid="pone.0154794.ref019" ref-type="bibr">19</xref>]. Tsykun et al. [<xref rid="pone.0154794.ref020" ref-type="bibr">20</xref>] used a multilocus approach for the identification of <italic>Armillaria</italic> species occurring in Europe. Three loci, the rDNA ITS, IGS-1 (intergenic spacer region one) and the translation elongation factor-1 alpha (<italic>tef1</italic>-<italic>α</italic>), were used in their study. Among these, it was shown that <italic>tef1</italic>-<italic>α</italic> could successfully distinguish closely related <italic>Armillaria</italic> biological species, which has also been revealed by other researchers [<xref rid="pone.0154794.ref021" ref-type="bibr">21</xref>–<xref rid="pone.0154794.ref025" ref-type="bibr">25</xref>]. Based on the sequences from <italic>tef1</italic>-<italic>α</italic> and IGS-1, a recent study by Coetzee et al. [<xref rid="pone.0154794.ref026" ref-type="bibr">26</xref>] elucidated the phylogenetic relationships among biological species of <italic>Armillaria</italic> from China, and generally resolved four main phylogenetic groups, namely, the “<italic>A</italic>. <italic>ostoyae</italic>”, “<italic>A</italic>. <italic>gallica</italic>”, “<italic>A</italic>. <italic>tabescens</italic>” and “<italic>A</italic>. <italic>mellea</italic>” clusters. However, the relationship between the CBS and the phylogenetic clades is still unresolved, with most CBS (i.e., CBS C, F, G, H, J, L, N and O) remaining unnamed.</p><p>In this study, we extensively collect samples of <italic>Armillaria</italic> from China and analyze them using sequences of three DNA regions. Together with the rDNA ITS and <italic>tef1</italic>-<italic>α</italic>, which have been used in studies of <italic>Armillaria</italic> before, sequences from the beta-tubulin (<italic>β</italic>-<italic>tubulin</italic>) gene are also used, as it has been demonstrated that the third codons and introns of <italic>β</italic>-<italic>tubulin</italic> are highly variable and thus can be used at the interspecific level and even at the intraspecific level in fungal taxonomy [<xref rid="pone.0154794.ref027" ref-type="bibr">27</xref>–<xref rid="pone.0154794.ref029" ref-type="bibr">29</xref>]. In this study, we aim to i) reveal the phylogenetic diversity of <italic>Armillaria</italic> in China and establish the link between the CBS and the phylogenetic lineages; ii) determine the phylogenetic relationships among <italic>Armillaria</italic> samples from different regions of the Northern Hemisphere; and iii) assess the diversity of the phylogenetic lineages of <italic>Armillaria</italic> associated with Tianma in China.</p></sec><sec sec-type="materials|methods" id="sec002"><title>Materials and Methods</title><sec id="sec003"><title>Ethics statement</title><p><italic>Armillaria</italic> is neither protected nor endangered in the sampled areas, and all samples were collected by researchers following current Chinese regulations. None of the sampled locations are privately owned or protected by law.</p></sec><sec id="sec004"><title>Taxon sampling, strain collection and isolation</title><p><italic>Armillaria</italic> samples used in this study comprised three types: i) single-spore isolates representing 14 out of 16 known CBS (except CBS E and CBS P; the two isolates of CBS E were assigned to CBS C and CBS D by Zhao et al. [<xref rid="pone.0154794.ref030" ref-type="bibr">30</xref>] and the isolates of CBS P were not available), each with at least three single-spore isolates. They were all cultures previously assigned to biological species by one of the present authors (HCW) or other mycologists [<xref rid="pone.0154794.ref011" ref-type="bibr">11</xref>, <xref rid="pone.0154794.ref012" ref-type="bibr">12</xref>, <xref rid="pone.0154794.ref031" ref-type="bibr">31</xref>–<xref rid="pone.0154794.ref037" ref-type="bibr">37</xref>]; ii) basidiomata collected during the past 10 years, mainly from Southwest China; and iii) rhizomorphs/samples associated with Tianma, including rhizomorphs attached to the tuber surfaces, commercial strains of <italic>Armillaria</italic> used for the cultivation of Tianma, and rhizomorphs or basidiomata collected from inoculum (wood infected with <italic>Armillaria</italic> strains by farmers) on Tianma plantations in northeastern Yunnan during 2010–2014. <xref ref-type="table" rid="pone.0154794.t001">Table 1</xref> shows the details of all of the samples. Vouchers were kept in the Herbarium of Cryptogams of the Kunming Institute of Botany, Chinese Academy of Sciences (HKAS). For the rhizomorphs and some basidiomata, we prepared pure cultures to facilitate DNA isolation. All of the pure cultures were made from a variety of tissues following standard aseptic techniques. Pieces approximately 3–5 mm in length taken at the junction of the stipe and pileus of the basidiomata were inoculated on potato dextrose agar (PDA) media. Rhizomorphs were rinsed overnight with distilled water and sterilized with 75% ethanol for 1 min. The rhizomorphs were then carefully dried using sterilized filter paper, plated onto PDA media in Petri dishes, and cultured at 22–24°C in the dark. For the strains associated with Tianma, images of rhizomorphs were taken after about 2 weeks to compare the branching development. All of these isolates were preserved in the Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany (KIB) of the Chinese Academy of Sciences.</p><table-wrap id="pone.0154794.t001" orientation="portrait" position="float"><object-id pub-id-type="doi">10.1371/journal.pone.0154794.t001</object-id><label>Table 1</label><caption><title>Collections of <italic>Armillaria</italic> used in this study.</title></caption><alternatives><graphic id="pone.0154794.t001g" xlink:href="pone.0154794.t001"></graphic><table frame="hsides" rules="groups"><colgroup span="1"><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col></colgroup><thead><tr><th align="justify" rowspan="1" colspan="1">Taxon</th><th align="left" rowspan="1" colspan="1">Biological</th><th align="justify" rowspan="1" colspan="1">Herbarium ID</th><th align="justify" rowspan="1" colspan="1">Isolated ID</th><th align="justify" rowspan="1" colspan="1">Origin</th><th align="justify" rowspan="1" colspan="1">Location</th><th align="justify" colspan="3" rowspan="1">GenBank accession numbers</th></tr><tr><th align="justify" rowspan="1" colspan="1"></th><th align="left" rowspan="1" colspan="1">species <xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></th><th align="justify" rowspan="1" colspan="1"></th><th align="justify" rowspan="1" colspan="1"></th><th align="justify" rowspan="1" colspan="1"></th><th align="justify" rowspan="1" colspan="1"></th><th align="justify" rowspan="1" colspan="1">ITS</th><th align="justify" rowspan="1" colspan="1"><italic>tef1-α</italic></th><th align="justify" rowspan="1" colspan="1"><italic>β-tubulin</italic></th></tr></thead><tbody><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>borealis</italic></td><td align="left" rowspan="1" colspan="1"><italic>A</italic>. <italic>borealis</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86616</td><td align="justify" rowspan="1" colspan="1">97061/18<xref ref-type="table-fn" rid="t001fn002"><sup>2</sup></xref></td><td align="justify" rowspan="1" colspan="1">tester strain</td><td align="justify" rowspan="1" colspan="1">Helsinki, Finland</td><td align="justify" rowspan="1" colspan="1">KT822291</td><td align="justify" rowspan="1" colspan="1">KT822427</td><td align="justify" rowspan="1" colspan="1">KT822214</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>borealis</italic></td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 76263</td><td align="justify" rowspan="1" colspan="1">Gt571</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Muli, SC</td><td align="justify" rowspan="1" colspan="1">KT822294</td><td align="justify" rowspan="1" colspan="1">KT822426</td><td align="justify" rowspan="1" colspan="1">KT822193</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>borealis</italic></td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 56108</td><td align="justify" rowspan="1" colspan="1">Li1254</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Xiangshan, YN</td><td align="justify" rowspan="1" colspan="1">KT822293</td><td align="justify" rowspan="1" colspan="1">KT822425</td><td align="justify" rowspan="1" colspan="1">-</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>cepistipes</italic></td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86542</td><td align="justify" rowspan="1" colspan="1">SN2<xref ref-type="table-fn" rid="t001fn007"><sup>d</sup></xref></td><td align="justify" rowspan="1" colspan="1">commercial strain</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822303</td><td align="justify" rowspan="1" colspan="1">KT822421</td><td align="justify" rowspan="1" colspan="1">KT822179</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>cepistipes</italic></td><td align="left" rowspan="1" colspan="1">CBS F</td><td align="justify" rowspan="1" colspan="1">HKAS 86583</td><td align="justify" rowspan="1" colspan="1">01108/1<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Xinlin, HLJ</td><td align="justify" rowspan="1" colspan="1">KT822290</td><td align="justify" rowspan="1" colspan="1">KT822417</td><td align="justify" rowspan="1" colspan="1">KT822181</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>cepistipes</italic></td><td align="left" rowspan="1" colspan="1">CBS F</td><td align="justify" rowspan="1" colspan="1">HKAS 86584</td><td align="justify" rowspan="1" colspan="1">96059/86<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Laotuding, LN</td><td align="justify" rowspan="1" colspan="1">KT822278</td><td align="justify" rowspan="1" colspan="1">KT822419</td><td align="justify" rowspan="1" colspan="1">KT822178</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>cepistipes</italic></td><td align="left" rowspan="1" colspan="1">CBS F</td><td align="justify" rowspan="1" colspan="1">HKAS 86585</td><td align="justify" rowspan="1" colspan="1">96060/21<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Laotuding, LN</td><td align="justify" rowspan="1" colspan="1">KT822283</td><td align="justify" rowspan="1" colspan="1">KT822420</td><td align="justify" rowspan="1" colspan="1">KT822180</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>cepistipes</italic></td><td align="left" rowspan="1" colspan="1">CBS F</td><td align="justify" rowspan="1" colspan="1">HKAS 86587</td><td align="justify" rowspan="1" colspan="1">99101/7<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Yichun, HLJ</td><td align="justify" rowspan="1" colspan="1">KT822287</td><td align="justify" rowspan="1" colspan="1">KT822418</td><td align="justify" rowspan="1" colspan="1">KT822182</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. cf. <italic>borealis</italic></td><td align="left" rowspan="1" colspan="1">(CBS M) <italic>A</italic>. <italic>borealis</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86617</td><td align="justify" rowspan="1" colspan="1">01015/7<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Shennongjia, HB</td><td align="justify" rowspan="1" colspan="1">KT822309</td><td align="justify" rowspan="1" colspan="1">KT822432</td><td align="justify" rowspan="1" colspan="1">KT822218</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. cf. <italic>gallica</italic></td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85517</td><td align="justify" rowspan="1" colspan="1">Guo408</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">XJ</td><td align="justify" rowspan="1" colspan="1">KT822312</td><td align="justify" rowspan="1" colspan="1">KT822409</td><td align="justify" rowspan="1" colspan="1">KU378051</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>ectypa</italic></td><td align="left" rowspan="1" colspan="1"></td><td align="justify" rowspan="1" colspan="1">HKAS 86565</td><td align="justify" rowspan="1" colspan="1">70011/13<xref ref-type="table-fn" rid="t001fn002"><sup>2</sup></xref></td><td align="justify" rowspan="1" colspan="1">strain</td><td align="justify" rowspan="1" colspan="1">Auvergne, France</td><td align="justify" rowspan="1" colspan="1">KT822340</td><td align="justify" rowspan="1" colspan="1">KT822438</td><td align="justify" rowspan="1" colspan="1">KT822241</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>gallica</italic></td><td align="left" rowspan="1" colspan="1"><italic>A</italic>. <italic>gallica</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86569</td><td align="justify" rowspan="1" colspan="1">93421/1<xref ref-type="table-fn" rid="t001fn002"><sup>2</sup></xref></td><td align="justify" rowspan="1" colspan="1">tester strain</td><td align="justify" rowspan="1" colspan="1">EU</td><td align="justify" rowspan="1" colspan="1">KT822277</td><td align="justify" rowspan="1" colspan="1">KT822414</td><td align="justify" rowspan="1" colspan="1">KT822203</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85471</td><td align="justify" rowspan="1" colspan="1">Guo104</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822242</td><td align="justify" rowspan="1" colspan="1">KT822341</td><td align="justify" rowspan="1" colspan="1">KT822148</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 49004</td><td align="justify" rowspan="1" colspan="1">Ge508</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Jiulong, SC</td><td align="justify" rowspan="1" colspan="1">KT822245</td><td align="justify" rowspan="1" colspan="1">KT822347</td><td align="justify" rowspan="1" colspan="1">KT822150</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85599</td><td align="justify" rowspan="1" colspan="1">Gt874</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Qujing, YN</td><td align="justify" rowspan="1" colspan="1">KT822249</td><td align="justify" rowspan="1" colspan="1">KT822342</td><td align="justify" rowspan="1" colspan="1">KU378052</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">homothallic <italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86588</td><td align="justify" rowspan="1" colspan="1">83003/2<xref ref-type="table-fn" rid="t001fn002"><sup>2</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Japan</td><td align="justify" rowspan="1" colspan="1">KT822246</td><td align="justify" rowspan="1" colspan="1">KT822352</td><td align="justify" rowspan="1" colspan="1">KT822151</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">(CBS G) homothallic <italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86590</td><td align="justify" rowspan="1" colspan="1">00020/6<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">strain</td><td align="justify" rowspan="1" colspan="1">Yulong, YN</td><td align="justify" rowspan="1" colspan="1">KT822251</td><td align="justify" rowspan="1" colspan="1">KT822354</td><td align="justify" rowspan="1" colspan="1">KT822158</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">(CBS G) homothallic <italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86591</td><td align="justify" rowspan="1" colspan="1">01010/1<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">strain</td><td align="justify" rowspan="1" colspan="1">Shennongjia, HB</td><td align="justify" rowspan="1" colspan="1">KT822252</td><td align="justify" rowspan="1" colspan="1">KT822343</td><td align="justify" rowspan="1" colspan="1">KT822156</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">(CBS G) homothallic <italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86592</td><td align="justify" rowspan="1" colspan="1">02001/5<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">strain</td><td align="justify" rowspan="1" colspan="1">Kuankuoshui, GZ</td><td align="justify" rowspan="1" colspan="1">KT822253</td><td align="justify" rowspan="1" colspan="1">KT822344</td><td align="justify" rowspan="1" colspan="1">KT822154</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">(CBS G) <italic>homothallic A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86593</td><td align="justify" rowspan="1" colspan="1">04054/14<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">strain</td><td align="justify" rowspan="1" colspan="1">Tianmushan, ZJ</td><td align="justify" rowspan="1" colspan="1">KT822254</td><td align="justify" rowspan="1" colspan="1">KT822345</td><td align="justify" rowspan="1" colspan="1">KT822155</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">(CBS G) homothallic <italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86594</td><td align="justify" rowspan="1" colspan="1">04055/9<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">strain</td><td align="justify" rowspan="1" colspan="1">Tianmushan, ZJ</td><td align="justify" rowspan="1" colspan="1">KT822244</td><td align="justify" rowspan="1" colspan="1">KT822349</td><td align="justify" rowspan="1" colspan="1">KT822157</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">(CBS G) homothallic <italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86597</td><td align="justify" rowspan="1" colspan="1">99044/2<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">strain</td><td align="justify" rowspan="1" colspan="1">Kunming, YN</td><td align="justify" rowspan="1" colspan="1">KT822255</td><td align="justify" rowspan="1" colspan="1">KT822351</td><td align="justify" rowspan="1" colspan="1">KT822149</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">homothallic <italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86598</td><td align="justify" rowspan="1" colspan="1">PFD84-103<xref ref-type="table-fn" rid="t001fn002"><sup>2</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Africa</td><td align="justify" rowspan="1" colspan="1">KT822248</td><td align="justify" rowspan="1" colspan="1">KT822348</td><td align="justify" rowspan="1" colspan="1">KT822159</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">homothallic <italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86599</td><td align="justify" rowspan="1" colspan="1">PFD87-39<xref ref-type="table-fn" rid="t001fn002"><sup>2</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Muguga, Kenya</td><td align="justify" rowspan="1" colspan="1">KT822250</td><td align="justify" rowspan="1" colspan="1">KT822350</td><td align="justify" rowspan="1" colspan="1">KT822152</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">homothallic <italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86600</td><td align="justify" rowspan="1" colspan="1">PFD87-41<xref ref-type="table-fn" rid="t001fn002"><sup>2</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Kenya</td><td align="justify" rowspan="1" colspan="1">KT822247</td><td align="justify" rowspan="1" colspan="1">KT822355</td><td align="justify" rowspan="1" colspan="1">KT822153</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">heterothallic <italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86611</td><td align="justify" rowspan="1" colspan="1">B275<xref ref-type="table-fn" rid="t001fn002"><sup>2</sup></xref></td><td align="justify" rowspan="1" colspan="1">tester strain</td><td align="justify" rowspan="1" colspan="1">New Hampshire, US</td><td align="justify" rowspan="1" colspan="1">KT822256</td><td align="justify" rowspan="1" colspan="1">KT822353</td><td align="justify" rowspan="1" colspan="1">KT822161</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="left" rowspan="1" colspan="1">(CBS K) heterothallic <italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86612</td><td align="justify" rowspan="1" colspan="1">00109/4<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Yulong, YN</td><td align="justify" rowspan="1" colspan="1">KT822243</td><td align="justify" rowspan="1" colspan="1">KT822346</td><td align="justify" rowspan="1" colspan="1">KT822160</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>nabsnona</italic></td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85499</td><td align="justify" rowspan="1" colspan="1">Guo316</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822265</td><td align="justify" rowspan="1" colspan="1">KT822410</td><td align="justify" rowspan="1" colspan="1">KT822189</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>nabsnona</italic></td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85500</td><td align="justify" rowspan="1" colspan="1">Guo317</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822266</td><td align="justify" rowspan="1" colspan="1">KT822413</td><td align="justify" rowspan="1" colspan="1">KT822190</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>nabsnona</italic></td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86544</td><td align="justify" rowspan="1" colspan="1">ZT-1<xref ref-type="table-fn" rid="t001fn007"><sup>d</sup></xref></td><td align="justify" rowspan="1" colspan="1">commercial strain</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822270</td><td align="justify" rowspan="1" colspan="1">KT822412</td><td align="justify" rowspan="1" colspan="1">KT822191</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>nabsnona</italic></td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85523</td><td align="justify" rowspan="1" colspan="1">Gt798</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822333</td><td align="justify" rowspan="1" colspan="1">KT822411</td><td align="justify" rowspan="1" colspan="1">KT822192</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>ostoyae</italic></td><td align="left" rowspan="1" colspan="1">(CBS D) <italic>A</italic>. <italic>ostoyae</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86579</td><td align="justify" rowspan="1" colspan="1">96043/11<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Dunhua, JL</td><td align="justify" rowspan="1" colspan="1">KT822310</td><td align="justify" rowspan="1" colspan="1">KT822428</td><td align="justify" rowspan="1" colspan="1">KT822215</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>ostoyae</italic></td><td align="left" rowspan="1" colspan="1">(CBS D) <italic>A</italic>. <italic>ostoyae</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86580</td><td align="justify" rowspan="1" colspan="1">96044/24<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Dunhua, JL</td><td align="justify" rowspan="1" colspan="1">KT822311</td><td align="justify" rowspan="1" colspan="1">KT822430</td><td align="justify" rowspan="1" colspan="1">KT822216</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>ostoyae</italic></td><td align="left" rowspan="1" colspan="1">(CBS D) <italic>A</italic>. <italic>ostoyae</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86581</td><td align="justify" rowspan="1" colspan="1">97058B/16<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Dunhua, JL</td><td align="justify" rowspan="1" colspan="1">KT822292</td><td align="justify" rowspan="1" colspan="1">KT822429</td><td align="justify" rowspan="1" colspan="1">KT822217</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>ostoyae</italic></td><td align="left" rowspan="1" colspan="1">(CBS D) <italic>A</italic>. <italic>ostoyae</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86582</td><td align="justify" rowspan="1" colspan="1">98+3/4<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Dunhua, JL</td><td align="justify" rowspan="1" colspan="1">KT822307</td><td align="justify" rowspan="1" colspan="1">KT822431</td><td align="justify" rowspan="1" colspan="1">KT822177</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>sinapina</italic></td><td align="left" rowspan="1" colspan="1">(CBS A) <italic>A</italic>. <italic>sinapina</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86566</td><td align="justify" rowspan="1" colspan="1">96015/39<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Changbaishan, JL</td><td align="justify" rowspan="1" colspan="1">KT822323</td><td align="justify" rowspan="1" colspan="1">KT822422</td><td align="justify" rowspan="1" colspan="1">KT822208</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>sinapina</italic></td><td align="left" rowspan="1" colspan="1">(CBS A) <italic>A</italic>. <italic>sinapina</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86567</td><td align="justify" rowspan="1" colspan="1">96037/12<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Changbaishan, JL</td><td align="justify" rowspan="1" colspan="1">KT822272</td><td align="justify" rowspan="1" colspan="1">KT822423</td><td align="justify" rowspan="1" colspan="1">KT822211</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>sinapina</italic></td><td align="left" rowspan="1" colspan="1">(CBS A) <italic>A</italic>. <italic>sinapina</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86568</td><td align="justify" rowspan="1" colspan="1">99116/7<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Yichun, HLJ</td><td align="justify" rowspan="1" colspan="1">KT822262</td><td align="justify" rowspan="1" colspan="1">KT822424</td><td align="justify" rowspan="1" colspan="1">KT822219</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. sp.</td><td align="left" rowspan="1" colspan="1">CBS N</td><td align="justify" rowspan="1" colspan="1">HKAS 86620</td><td align="justify" rowspan="1" colspan="1">02066/3<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Emeishan, SC</td><td align="justify" rowspan="1" colspan="1">KT822317</td><td align="justify" rowspan="1" colspan="1">KT822389</td><td align="justify" rowspan="1" colspan="1">KT822236</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. sp.</td><td align="left" rowspan="1" colspan="1">CBS J</td><td align="justify" rowspan="1" colspan="1">HKAS 86607</td><td align="justify" rowspan="1" colspan="1">00112/5<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Yulong, YN</td><td align="justify" rowspan="1" colspan="1">KT822330</td><td align="justify" rowspan="1" colspan="1">KT822358</td><td align="justify" rowspan="1" colspan="1">KT822210</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>tabescens</italic></td><td align="left" rowspan="1" colspan="1">(CBS I) <italic>A</italic>. <italic>tabescens</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86603</td><td align="justify" rowspan="1" colspan="1">99122/13<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Beijing</td><td align="justify" rowspan="1" colspan="1">KT822240</td><td align="justify" rowspan="1" colspan="1">KT822441</td><td align="justify" rowspan="1" colspan="1">KT822339</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>tabescens</italic></td><td align="left" rowspan="1" colspan="1"><italic>A</italic>. <italic>tabescens</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86604</td><td align="justify" rowspan="1" colspan="1">CT1097.3<xref ref-type="table-fn" rid="t001fn002"><sup>2</sup></xref></td><td align="justify" rowspan="1" colspan="1">tester strain</td><td align="justify" rowspan="1" colspan="1">Messina, Italy</td><td align="justify" rowspan="1" colspan="1">KT822338</td><td align="justify" rowspan="1" colspan="1">KT822440</td><td align="justify" rowspan="1" colspan="1">KT822239</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>tabescens</italic></td><td align="left" rowspan="1" colspan="1"><italic>A</italic>. <italic>tabescens</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86605</td><td align="justify" rowspan="1" colspan="1">90158<xref ref-type="table-fn" rid="t001fn002"><sup>2</sup></xref></td><td align="justify" rowspan="1" colspan="1">tester strain</td><td align="justify" rowspan="1" colspan="1">Slovenia</td><td align="justify" rowspan="1" colspan="1">KT822337</td><td align="justify" rowspan="1" colspan="1">KT822439</td><td align="justify" rowspan="1" colspan="1">KT822238</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 1</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85457</td><td align="justify" rowspan="1" colspan="1">Guo90</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822271</td><td align="justify" rowspan="1" colspan="1">KT822385</td><td align="justify" rowspan="1" colspan="1">KT822224</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 1</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85519</td><td align="justify" rowspan="1" colspan="1">Gt794</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822335</td><td align="justify" rowspan="1" colspan="1">KT822373</td><td align="justify" rowspan="1" colspan="1">KT822225</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 1</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85527</td><td align="justify" rowspan="1" colspan="1">Gt802<xref ref-type="table-fn" rid="t001fn006"><sup>c</sup></xref></td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822322</td><td align="justify" rowspan="1" colspan="1">KT822374</td><td align="justify" rowspan="1" colspan="1">KT822227</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 1</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85551</td><td align="justify" rowspan="1" colspan="1">Gt826<xref ref-type="table-fn" rid="t001fn006"><sup>c</sup></xref></td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Weixin, YN</td><td align="justify" rowspan="1" colspan="1">KT822313</td><td align="justify" rowspan="1" colspan="1">KT822382</td><td align="justify" rowspan="1" colspan="1">KT822231</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 1</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85575</td><td align="justify" rowspan="1" colspan="1">Gt850<xref ref-type="table-fn" rid="t001fn006"><sup>c</sup></xref></td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Weixin, YN</td><td align="justify" rowspan="1" colspan="1">KT822314</td><td align="justify" rowspan="1" colspan="1">KT822383</td><td align="justify" rowspan="1" colspan="1">KT822230</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 1</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85581</td><td align="justify" rowspan="1" colspan="1">Gt856<xref ref-type="table-fn" rid="t001fn006"><sup>c</sup></xref></td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Weixin, YN</td><td align="justify" rowspan="1" colspan="1">KT822336</td><td align="justify" rowspan="1" colspan="1">KT822392</td><td align="justify" rowspan="1" colspan="1">KT822226</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 1</td><td align="left" rowspan="1" colspan="1">CBS L</td><td align="justify" rowspan="1" colspan="1">HKAS 86615</td><td align="justify" rowspan="1" colspan="1">00126/2<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Kuankuoshui, GZ</td><td align="justify" rowspan="1" colspan="1">KT822315</td><td align="justify" rowspan="1" colspan="1">KT822384</td><td align="justify" rowspan="1" colspan="1">KT822222</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 1</td><td align="left" rowspan="1" colspan="1">CBS N</td><td align="justify" rowspan="1" colspan="1">HKAS 86621</td><td align="justify" rowspan="1" colspan="1">02069/5<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Emeishan, SC</td><td align="justify" rowspan="1" colspan="1">KT822306</td><td align="justify" rowspan="1" colspan="1">KT822386</td><td align="justify" rowspan="1" colspan="1">KT822228</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 1</td><td align="left" rowspan="1" colspan="1">CBS N</td><td align="justify" rowspan="1" colspan="1">HKAS 86622</td><td align="justify" rowspan="1" colspan="1">02071/2<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Emeishan, SC</td><td align="justify" rowspan="1" colspan="1">KT822316</td><td align="justify" rowspan="1" colspan="1">KT822390</td><td align="justify" rowspan="1" colspan="1">KT822229</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 2</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86551</td><td align="justify" rowspan="1" colspan="1">Guo282<xref ref-type="table-fn" rid="t001fn005"><sup>b</sup></xref></td><td align="justify" rowspan="1" colspan="1">rhizomorphs</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822279</td><td align="justify" rowspan="1" colspan="1">KT822367</td><td align="justify" rowspan="1" colspan="1">KT822183</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 2</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86554</td><td align="justify" rowspan="1" colspan="1">Guo322<xref ref-type="table-fn" rid="t001fn005"><sup>b</sup></xref></td><td align="justify" rowspan="1" colspan="1">rhizomorphs</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822260</td><td align="justify" rowspan="1" colspan="1">KT822366</td><td align="justify" rowspan="1" colspan="1">KT822186</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 2</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86556</td><td align="justify" rowspan="1" colspan="1">Guo364<xref ref-type="table-fn" rid="t001fn007"><sup>d</sup></xref></td><td align="justify" rowspan="1" colspan="1">commercial strain</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822259</td><td align="justify" rowspan="1" colspan="1">KT822370</td><td align="justify" rowspan="1" colspan="1">KT822187</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 2</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86557</td><td align="justify" rowspan="1" colspan="1">Guo365<xref ref-type="table-fn" rid="t001fn007"><sup>d</sup></xref></td><td align="justify" rowspan="1" colspan="1">commercial strain</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822301</td><td align="justify" rowspan="1" colspan="1">KT822368</td><td align="justify" rowspan="1" colspan="1">KT822184</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 2</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86543</td><td align="justify" rowspan="1" colspan="1">SN4<xref ref-type="table-fn" rid="t001fn007"><sup>d</sup></xref></td><td align="justify" rowspan="1" colspan="1">commercial strain</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822334</td><td align="justify" rowspan="1" colspan="1">KT822369</td><td align="justify" rowspan="1" colspan="1">KT822185</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 2</td><td align="left" rowspan="1" colspan="1">CBS O</td><td align="justify" rowspan="1" colspan="1">HKAS 86623</td><td align="justify" rowspan="1" colspan="1">02072/23<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Emeishan, SC</td><td align="justify" rowspan="1" colspan="1">KT822318</td><td align="justify" rowspan="1" colspan="1">KT822363</td><td align="justify" rowspan="1" colspan="1">KT822188</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 3</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85449</td><td align="justify" rowspan="1" colspan="1">Guo82</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822299</td><td align="justify" rowspan="1" colspan="1">KT822387</td><td align="justify" rowspan="1" colspan="1">KT822176</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 3</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86548</td><td align="justify" rowspan="1" colspan="1">Guo278<xref ref-type="table-fn" rid="t001fn005"><sup>b</sup></xref></td><td align="justify" rowspan="1" colspan="1">rhizomorphs</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822296</td><td align="justify" rowspan="1" colspan="1">KT822395</td><td align="justify" rowspan="1" colspan="1">KT822173</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 3</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86552</td><td align="justify" rowspan="1" colspan="1">Guo286<xref ref-type="table-fn" rid="t001fn004"><sup>a</sup></xref></td><td align="justify" rowspan="1" colspan="1">rhizomorphs</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822297</td><td align="justify" rowspan="1" colspan="1">KT822393</td><td align="justify" rowspan="1" colspan="1">KT822220</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 3</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86553</td><td align="justify" rowspan="1" colspan="1">Guo287</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822298</td><td align="justify" rowspan="1" colspan="1">KT822394</td><td align="justify" rowspan="1" colspan="1">KT822174</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 3</td><td align="left" rowspan="1" colspan="1">CBS L</td><td align="justify" rowspan="1" colspan="1">HKAS 86613</td><td align="justify" rowspan="1" colspan="1">00125/1<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Kuankuoshui, GZ</td><td align="justify" rowspan="1" colspan="1">KT822319</td><td align="justify" rowspan="1" colspan="1">KT822388</td><td align="justify" rowspan="1" colspan="1">KT822232</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 3</td><td align="left" rowspan="1" colspan="1">CBS L</td><td align="justify" rowspan="1" colspan="1">HKAS 86614</td><td align="justify" rowspan="1" colspan="1">00125/2<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Kuankuoshui, GZ</td><td align="justify" rowspan="1" colspan="1">KT822305</td><td align="justify" rowspan="1" colspan="1">KT822391</td><td align="justify" rowspan="1" colspan="1">KT822221</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 3</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86555</td><td align="justify" rowspan="1" colspan="1">Guo324<xref ref-type="table-fn" rid="t001fn005"><sup>b</sup></xref></td><td align="justify" rowspan="1" colspan="1">rhizomorphs</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822302</td><td align="justify" rowspan="1" colspan="1">KT822381</td><td align="justify" rowspan="1" colspan="1">KT822175</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 51692</td><td align="justify" rowspan="1" colspan="1">Yang4881</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Baiyu, SC</td><td align="justify" rowspan="1" colspan="1">KT822269</td><td align="justify" rowspan="1" colspan="1">KT822415</td><td align="justify" rowspan="1" colspan="1">KT822163</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 51046</td><td align="justify" rowspan="1" colspan="1">Ge1461</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Daocheng, SC</td><td align="justify" rowspan="1" colspan="1">KT822257</td><td align="justify" rowspan="1" colspan="1">KT822356</td><td align="justify" rowspan="1" colspan="1">KT822162</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85594</td><td align="justify" rowspan="1" colspan="1">Gt869</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822274</td><td align="justify" rowspan="1" colspan="1">KT822377</td><td align="justify" rowspan="1" colspan="1">KT822172</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 45820</td><td align="justify" rowspan="1" colspan="1">Yang4434</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Changdu, Tibet</td><td align="justify" rowspan="1" colspan="1">KT822258</td><td align="justify" rowspan="1" colspan="1">KT822380</td><td align="justify" rowspan="1" colspan="1">-</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">CBS H</td><td align="justify" rowspan="1" colspan="1">HKAS 86601</td><td align="justify" rowspan="1" colspan="1">99012/1<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Yichun, HLJ</td><td align="justify" rowspan="1" colspan="1">KT822280</td><td align="justify" rowspan="1" colspan="1">KT822357</td><td align="justify" rowspan="1" colspan="1">KT822166</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">CBS H</td><td align="justify" rowspan="1" colspan="1">HKAS 86602</td><td align="justify" rowspan="1" colspan="1">00019/4<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Yulong, YN</td><td align="justify" rowspan="1" colspan="1">KT822308</td><td align="justify" rowspan="1" colspan="1">KT822378</td><td align="justify" rowspan="1" colspan="1">KT822167</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">CBS J</td><td align="justify" rowspan="1" colspan="1">HKAS 86606</td><td align="justify" rowspan="1" colspan="1">00107/2<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Yulong, YN</td><td align="justify" rowspan="1" colspan="1">KT822281</td><td align="justify" rowspan="1" colspan="1">KT822359</td><td align="justify" rowspan="1" colspan="1">KT822171</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">CBS J</td><td align="justify" rowspan="1" colspan="1">HKAS 86608</td><td align="justify" rowspan="1" colspan="1">00115/3<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Xianggelila, YN</td><td align="justify" rowspan="1" colspan="1">KT822282</td><td align="justify" rowspan="1" colspan="1">KT822375</td><td align="justify" rowspan="1" colspan="1">KT822165</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">CBS J</td><td align="justify" rowspan="1" colspan="1">HKAS 86609</td><td align="justify" rowspan="1" colspan="1">00117/7<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Xianggelila, YN</td><td align="justify" rowspan="1" colspan="1">KT822331</td><td align="justify" rowspan="1" colspan="1">KT822372</td><td align="justify" rowspan="1" colspan="1">KT822169</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">CBS J</td><td align="justify" rowspan="1" colspan="1">HKAS 86610</td><td align="justify" rowspan="1" colspan="1">02049/2<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Xinyuan, XJ</td><td align="justify" rowspan="1" colspan="1">KT822332</td><td align="justify" rowspan="1" colspan="1">KT822371</td><td align="justify" rowspan="1" colspan="1">KT822164</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">(CBS M) <italic>A</italic>. <italic>borealis</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86618</td><td align="justify" rowspan="1" colspan="1">01018/10<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Shennongjia, HB</td><td align="justify" rowspan="1" colspan="1">KT822321</td><td align="justify" rowspan="1" colspan="1">KT822376</td><td align="justify" rowspan="1" colspan="1">KT822170</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="left" rowspan="1" colspan="1">(CBS M) <italic>A</italic>. <italic>borealis</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86619</td><td align="justify" rowspan="1" colspan="1">01019/1<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Shennongjia, HB</td><td align="justify" rowspan="1" colspan="1">KT822295</td><td align="justify" rowspan="1" colspan="1">KT822362</td><td align="justify" rowspan="1" colspan="1">KT822168</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 5</td><td align="left" rowspan="1" colspan="1">CBS C</td><td align="justify" rowspan="1" colspan="1">HKAS 86574</td><td align="justify" rowspan="1" colspan="1">93022/13<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Changbaishan, JL</td><td align="justify" rowspan="1" colspan="1">KT822324</td><td align="justify" rowspan="1" colspan="1">KT822361</td><td align="justify" rowspan="1" colspan="1">KT822200</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 5</td><td align="left" rowspan="1" colspan="1">CBS C</td><td align="justify" rowspan="1" colspan="1">HKAS 86575</td><td align="justify" rowspan="1" colspan="1">96018/7<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Changbaishan, JL</td><td align="justify" rowspan="1" colspan="1">KT822327</td><td align="justify" rowspan="1" colspan="1">KT822364</td><td align="justify" rowspan="1" colspan="1">KT822201</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 5</td><td align="left" rowspan="1" colspan="1">CBS C</td><td align="justify" rowspan="1" colspan="1">HKAS 86576</td><td align="justify" rowspan="1" colspan="1">99109/6<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Yichun, HLJ</td><td align="justify" rowspan="1" colspan="1">KT822326</td><td align="justify" rowspan="1" colspan="1">KT822360</td><td align="justify" rowspan="1" colspan="1">KT822234</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 5</td><td align="left" rowspan="1" colspan="1">CBS C</td><td align="justify" rowspan="1" colspan="1">HKAS 86577</td><td align="justify" rowspan="1" colspan="1">99110/6<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Yichun, HLJ</td><td align="justify" rowspan="1" colspan="1">KT822267</td><td align="justify" rowspan="1" colspan="1">KT822379</td><td align="justify" rowspan="1" colspan="1">KT822235</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 5</td><td align="left" rowspan="1" colspan="1">CBS C</td><td align="justify" rowspan="1" colspan="1">HKAS 86578</td><td align="justify" rowspan="1" colspan="1">99115/10<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Yichun, HLJ</td><td align="justify" rowspan="1" colspan="1">KT822325</td><td align="justify" rowspan="1" colspan="1">KT822365</td><td align="justify" rowspan="1" colspan="1">KT822209</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86558</td><td align="justify" rowspan="1" colspan="1">A9<xref ref-type="table-fn" rid="t001fn007"><sup>d</sup></xref></td><td align="justify" rowspan="1" colspan="1">commercial strain</td><td align="justify" rowspan="1" colspan="1">Korea</td><td align="justify" rowspan="1" colspan="1">KT822285</td><td align="justify" rowspan="1" colspan="1">KT822407</td><td align="justify" rowspan="1" colspan="1">KT822198</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86559</td><td align="justify" rowspan="1" colspan="1">Guo343<xref ref-type="table-fn" rid="t001fn007"><sup>d</sup></xref></td><td align="justify" rowspan="1" colspan="1">commercial strain</td><td align="justify" rowspan="1" colspan="1">Hanzhong, SX</td><td align="justify" rowspan="1" colspan="1">KT822289</td><td align="justify" rowspan="1" colspan="1">KT822406</td><td align="justify" rowspan="1" colspan="1">KT822197</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86560</td><td align="justify" rowspan="1" colspan="1">Jing-234<xref ref-type="table-fn" rid="t001fn007"><sup>d</sup></xref></td><td align="justify" rowspan="1" colspan="1">commercial strain</td><td align="justify" rowspan="1" colspan="1">SX</td><td align="justify" rowspan="1" colspan="1">KT822264</td><td align="justify" rowspan="1" colspan="1">KT822408</td><td align="justify" rowspan="1" colspan="1">KT822212</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86564</td><td align="justify" rowspan="1" colspan="1">Guo341<xref ref-type="table-fn" rid="t001fn007"><sup>d</sup></xref></td><td align="justify" rowspan="1" colspan="1">commercial strain</td><td align="justify" rowspan="1" colspan="1">HB</td><td align="justify" rowspan="1" colspan="1">KT822284</td><td align="justify" rowspan="1" colspan="1">KT822405</td><td align="justify" rowspan="1" colspan="1">KT822196</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85567</td><td align="justify" rowspan="1" colspan="1">Gt842<xref ref-type="table-fn" rid="t001fn006"><sup>c</sup></xref></td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Weixin, YN</td><td align="justify" rowspan="1" colspan="1">KT822268</td><td align="justify" rowspan="1" colspan="1">KT822399</td><td align="justify" rowspan="1" colspan="1">KT822213</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 85572</td><td align="justify" rowspan="1" colspan="1">Gt847<xref ref-type="table-fn" rid="t001fn006"><sup>c</sup></xref></td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Weixin, YN</td><td align="justify" rowspan="1" colspan="1">KT822273</td><td align="justify" rowspan="1" colspan="1">KT822400</td><td align="justify" rowspan="1" colspan="1">KT822207</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">(CBS B) <italic>A</italic>. <italic>gallica</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86571</td><td align="justify" rowspan="1" colspan="1">02147/1<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Mudanjiang, HLJ</td><td align="justify" rowspan="1" colspan="1">KT822288</td><td align="justify" rowspan="1" colspan="1">KT822404</td><td align="justify" rowspan="1" colspan="1">KT822205</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">(CBS B) <italic>A</italic>. <italic>gallica</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86573</td><td align="justify" rowspan="1" colspan="1">96011/25<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Changbaishan, JL</td><td align="justify" rowspan="1" colspan="1">KT822300</td><td align="justify" rowspan="1" colspan="1">KT822398</td><td align="justify" rowspan="1" colspan="1">KT822202</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86561</td><td align="justify" rowspan="1" colspan="1">K19<xref ref-type="table-fn" rid="t001fn007"><sup>d</sup></xref></td><td align="justify" rowspan="1" colspan="1">commercial strain</td><td align="justify" rowspan="1" colspan="1">China</td><td align="justify" rowspan="1" colspan="1">KT822329</td><td align="justify" rowspan="1" colspan="1">KT822401</td><td align="justify" rowspan="1" colspan="1">-</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86563</td><td align="justify" rowspan="1" colspan="1">Guo342<xref ref-type="table-fn" rid="t001fn007"><sup>d</sup></xref></td><td align="justify" rowspan="1" colspan="1">commercial strain</td><td align="justify" rowspan="1" colspan="1">HB</td><td align="justify" rowspan="1" colspan="1">KT822286</td><td align="justify" rowspan="1" colspan="1">KT822397</td><td align="justify" rowspan="1" colspan="1">KT822199</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 45821</td><td align="justify" rowspan="1" colspan="1">Yang4445</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Kunming, YN</td><td align="justify" rowspan="1" colspan="1">KT822261</td><td align="justify" rowspan="1" colspan="1">KT822396</td><td align="justify" rowspan="1" colspan="1">KT822194</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">(CBS B) <italic>A</italic>. <italic>gallica</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86570</td><td align="justify" rowspan="1" colspan="1">01106/7<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Beian, HLJ</td><td align="justify" rowspan="1" colspan="1">KT822320</td><td align="justify" rowspan="1" colspan="1">KT822402</td><td align="justify" rowspan="1" colspan="1">KT822204</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="left" rowspan="1" colspan="1">(CBS B) <italic>A</italic>. <italic>gallica</italic></td><td align="justify" rowspan="1" colspan="1">HKAS 86572</td><td align="justify" rowspan="1" colspan="1">96011/16<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Changbaishan, JL</td><td align="justify" rowspan="1" colspan="1">KT822328</td><td align="justify" rowspan="1" colspan="1">KT822403</td><td align="justify" rowspan="1" colspan="1">KT822206</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 7</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 83303</td><td align="justify" rowspan="1" colspan="1">Qin886</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Longling, YN</td><td align="justify" rowspan="1" colspan="1">KU378047</td><td align="justify" rowspan="1" colspan="1">KT822437</td><td align="justify" rowspan="1" colspan="1">KU378049</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 7</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 83361</td><td align="justify" rowspan="1" colspan="1">Qin944</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Longling, YN</td><td align="justify" rowspan="1" colspan="1">KU378048</td><td align="justify" rowspan="1" colspan="1">KT822436</td><td align="justify" rowspan="1" colspan="1">KU378050</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 7</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86541</td><td align="justify" rowspan="1" colspan="1">Xhwang3394</td><td align="justify" rowspan="1" colspan="1">basidioma</td><td align="justify" rowspan="1" colspan="1">Lincang, YN</td><td align="justify" rowspan="1" colspan="1">KT822304</td><td align="justify" rowspan="1" colspan="1">KT822435</td><td align="justify" rowspan="1" colspan="1">KT822237</td></tr><tr><td align="justify" rowspan="1" colspan="1">Nag. E</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86549</td><td align="justify" rowspan="1" colspan="1">Guo279<xref ref-type="table-fn" rid="t001fn005"><sup>b</sup></xref></td><td align="justify" rowspan="1" colspan="1">rhizomorphs</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822275</td><td align="justify" rowspan="1" colspan="1">KT822433</td><td align="justify" rowspan="1" colspan="1">KT822195</td></tr><tr><td align="justify" rowspan="1" colspan="1">Nag. E</td><td align="left" rowspan="1" colspan="1">/</td><td align="justify" rowspan="1" colspan="1">HKAS 86550</td><td align="justify" rowspan="1" colspan="1">Guo281<xref ref-type="table-fn" rid="t001fn005"><sup>b</sup></xref></td><td align="justify" rowspan="1" colspan="1">rhizomorphs</td><td align="justify" rowspan="1" colspan="1">Yiliang, YN</td><td align="justify" rowspan="1" colspan="1">KT822276</td><td align="justify" rowspan="1" colspan="1">KT822434</td><td align="justify" rowspan="1" colspan="1">KT822233</td></tr><tr><td align="justify" rowspan="1" colspan="1">North American <italic>A</italic>. <italic>cepistipes</italic></td><td align="left" rowspan="1" colspan="1">CBS F</td><td align="justify" rowspan="1" colspan="1">HKAS 86586</td><td align="justify" rowspan="1" colspan="1">97033/1<xref ref-type="table-fn" rid="t001fn001"><sup>1</sup></xref></td><td align="justify" rowspan="1" colspan="1">single spore</td><td align="justify" rowspan="1" colspan="1">Changbaishan, JL</td><td align="justify" rowspan="1" colspan="1">KT822263</td><td align="justify" rowspan="1" colspan="1">KT822416</td><td align="justify" rowspan="1" colspan="1">KT822223</td></tr></tbody></table></alternatives><table-wrap-foot><fn id="t001fn001"><p><sup>1</sup> the isolates were previously assigned to biological species by Qin et al. [<xref rid="pone.0154794.ref011" ref-type="bibr">11</xref>].</p></fn><fn id="t001fn002"><p><sup>2</sup> tester strains.</p></fn><fn id="t001fn003"><p>The samples associated with Tianma</p></fn><fn id="t001fn004"><p><sup>a</sup> rhizomorphs attached to the tuber surfaces</p></fn><fn id="t001fn005"><p><sup>b</sup> rhizomorphs collected from inoculum (wood infected with <italic>Armillaria</italic> strains by farmers) at the Tianma plantations</p></fn><fn id="t001fn006"><p><sup>c</sup> basidiomata collected from inoculum (wood infected with <italic>Armillaria</italic> strains by farmers) at the Tianma plantations</p></fn><fn id="t001fn007"><p><sup>d</sup> commercial strains of <italic>Armillaria</italic> used for the cultivation of Tianma</p></fn><fn id="t001fn008"><p>Abbreviations: CBS = Chinese biological species; HKAS = the Herbarium of Cryptogams of the Kunming Institute of Botany (KIB); Chinese Academy of Sciences; SC = Sichuan Province; YN = Yunnan Province; HB = Hubei Province; JL = Jilin Province; HLJ = Heilongjiang Province; LN = Liaoning Province; GZ = Guizhou Province; ZJ = Zhejiang Province; XJ = Xinjiang Province; SX = Shaanxi Province</p></fn></table-wrap-foot></table-wrap></sec><sec id="sec005"><title>DNA isolation, PCR, DNA sequencing and alignments</title><p>DNA was directly extracted from dry specimens or cultures using the cetyltrimethylammonium bromide (CTAB) method [<xref rid="pone.0154794.ref038" ref-type="bibr">38</xref>]. Primers ITS1F and ITS4B [<xref rid="pone.0154794.ref039" ref-type="bibr">39</xref>] were used to amplify the 5.8S rRNA gene and the flanking ITS regions, and primer pairs EF595F/EF1160R [<xref rid="pone.0154794.ref040" ref-type="bibr">40</xref>] or 983F/1567R [<xref rid="pone.0154794.ref041" ref-type="bibr">41</xref>] were used to amplify <italic>tef1-α</italic>. For <italic>β</italic>-<italic>tubulin</italic>, primer pairs TubF (5′- GGTGCGGGTAACTGGGC -3′) and TubR (5′- GAGGCAGCCATCATGTTCTT -3′) [<xref rid="pone.0154794.ref042" ref-type="bibr">42</xref>] were used in the amplifications. PCR was performed in a total volume of 25 μl containing 2.5 μl of PCR reaction buffer, 0.5 μl of dNTP mixture (0.2 mM), 1 μl of each primer (5 μM), 1 U of Taq polymerase, and 1 μl of DNA template. PCR reactions were conducted on an ABI 2720 Thermal Cycler (Applied Biosystems, Foster City, CA, USA) under the following reaction conditions: predenaturation at 94°C for 3 min, followed by 35 cycles of denaturation at 94°C for 40 s, annealing at 50°C (for ITS), 52°C (for <italic>tef1</italic>-<italic>α</italic>) and 53°C (for <italic>β</italic>-<italic>tubulin</italic>) for 40 s, and elongation at 72°C for 90 s. A final elongation at 72°C for 6 min was included after the cycles. We run 3–5 μl of the PCR products on a 2% agarose gel to verify correct amplification. PCR products were purified with a Gel Extraction & PCR Purification Combo Kit (Spin-column) (Bioteke, Beijing, China). The purified products were then sequenced in both directions on an ABI-3730-XL DNA Analyzer (Applied Biosystems, Foster City, CA, USA) using the same primers as in the PCR amplifications. For most of the samples, PCR amplification of ITS and <italic>β</italic>-<italic>tubulin</italic> yielded a single strong band. Amplicons ranged in size between ~1,000 bp for ITS and ~900 bp for <italic>β</italic>-<italic>tubulin</italic>. Amplification of the <italic>tef1</italic>-<italic>α</italic> region yielded a strong band of about 600 bp for all of the samples. PCR products that could not be sequenced successfully were cloned into a PMD18-T vector (Takara, Japan) and then sequenced with primers M13F (5′ -GTAAAACGACGGCCAGTGAA-3′) and M13R (5′ -CAGGAAACAGCTATGACCAT-3′). The contiguous sequences were assembled with SeqMan implemented in Lasergene v7.1 (DNASTAR Inc., USA).</p><p>Six matrices were compiled for different purposes. The first four matrices, namely, ITS, <italic>tef1</italic>-<italic>α</italic> (EF1-I matrix), <italic>β</italic>-<italic>tubulin</italic> and the three-locus matrices, consisted of sequences generated in this study. They were used to delimit phylogenetic lineages of <italic>Armillaria</italic> in China. The four matrices contained sequences obtained from nine tester strains, which have been used by other authors to perform mating tests with Chinese isolates to identify biological species [<xref rid="pone.0154794.ref011" ref-type="bibr">11</xref>, <xref rid="pone.0154794.ref012" ref-type="bibr">12</xref>, <xref rid="pone.0154794.ref043" ref-type="bibr">43</xref>]. We used these sequences to achieve broader sampling for establishing the relationships between the biological species and phylogenetic lineages. A fifth matrix, named here as the comprehensive <italic>tef1-α</italic> matrix (EF1-II matrix), comprised <italic>tef1-α</italic> sequences generated in this study (from 101 collections) and 81 sequences retrieved from the GenBank (NCBI; <ext-link ext-link-type="uri" xlink:href="http://blast.ncbi.nlm.nih.gov/">http://blast.ncbi.nlm.nih.gov/</ext-link>; <xref ref-type="supplementary-material" rid="pone.0154794.s004">S1 Table</xref>). These sequences were selected based on two criteria: i) they were representative of species isolates from the Northern Hemisphere (Europe and North America) and East Africa, and ii) mating tests had been performed on these isolates. This 182-collection dataset was used to identify the relationships among all of our samples and known related samples in the GenBank.</p><p>We found that some diploid individuals contained many heterozygous sites (more than five sites) in the <italic>tef1</italic>-<italic>α</italic> region based on the alignment of EF1-II. In these cases, the program PHASE 2.0 (<ext-link ext-link-type="uri" xlink:href="http://www.bioinf.manchester.ac.uk/resources/phase/">http://www.bioinf.manchester.ac.uk/resources/phase/</ext-link>) was used to resolve the haplotype of these heterozygous samples using the default parameter settings [<xref rid="pone.0154794.ref044" ref-type="bibr">44</xref>]. Therefore, a sixth matrix (EF1-III matrix), which was based on the EF1-II matrix and contained these haplotypes, was generated to illuminate the phylogenetic relationships among them. For all of the matrices, <italic>A</italic>. <italic>ectypa</italic> (Fr.) Lamoure was selected as the outgroup based on a previous study [<xref rid="pone.0154794.ref022" ref-type="bibr">22</xref>].</p><p>Each of the ITS, <italic>β</italic>-<italic>tubulin</italic> and EF1-I, II, and III matrices were aligned in MAFFT v6.853 with the auto strategy [<xref rid="pone.0154794.ref045" ref-type="bibr">45</xref>], and manually optimized in BioEdit v7.0.9 [<xref rid="pone.0154794.ref046" ref-type="bibr">46</xref>]. The three-locus matrix was compiled by concatenating the sequences of the ITS, EF1-I, and <italic>β</italic>-<italic>tubulin</italic> matrices in Phyutility 2.2 [<xref rid="pone.0154794.ref047" ref-type="bibr">47</xref>]. The regions containing insertions and deletions (indels) were included in the analysis, with gaps treated as missing data.</p><p>To test whether potentially ambiguous sites in the original alignments would add noise to the phylogenetic analyses, we first used the on-line Gblocks v0.91b server (<ext-link ext-link-type="uri" xlink:href="http://molevol.cmima.csic.es/castresana/Gblocks_server.html">http://molevol.cmima.csic.es/castresana/Gblocks_server.html</ext-link>) to select sites by specifying less stringent conditions, i.e., allowing smaller final blocks, gap positions within the final blocks and less strict flanking positions. The generated alignment of ITS, <italic>tef1-α</italic> and <italic>β</italic>-<italic>tubulin</italic> retained 93%, 99% and 96% original characters, respectively. The excluded sites in the <italic>tef1-α</italic> and <italic>β</italic>-<italic>tubulin</italic> alignments were all within introns. However, the introns could be unambiguously aligned and had many parsimony-informative characters. In addition, comparison of the trees generated from the processed and original alignments showed that the original alignments produced even better topologies with higher support values. Many authors consider that there is a substantial loss of information upon the removal of any fragments from sequences that have already been obtained [<xref rid="pone.0154794.ref048" ref-type="bibr">48</xref>, <xref rid="pone.0154794.ref049" ref-type="bibr">49</xref>]. Therefore, in our final analyses, we included all of the characters. In the three-locus matrix, the unavailable <italic>β-tubulin</italic> sequences of three samples were treated as missing data in the phylogenetic analyses. The alignments of the six matrices are available from TreeBASE under accession no. 18700.</p></sec><sec id="sec006"><title>Phylogenetic analyses</title><p>The best-fitted substitution model for each matrix was determined through MrModeltest v2.3 [<xref rid="pone.0154794.ref050" ref-type="bibr">50</xref>] based on the Akaike information criterion (AIC). GTR+I+G, SYM+I+G and HKY+I+G were selected as the best models for the three-locus and ITS matrices, the three <italic>tef1</italic>-<italic>α</italic> matrices (EF1-I, II and III), and the <italic>β</italic>-<italic>tubulin</italic> matrix, respectively. Maximum likelihood (ML) analyses, Bayesian inference (BI) and maximum parsimony (MP) bootstrap analyses were conducted for the three-locus, EF1-II and EF1-III matrices. For the phylogenetic analyses based on the ITS, <italic>tef1</italic>-<italic>α</italic> (EF1-I) and <italic>β</italic>-<italic>tubulin</italic> matrices, only ML and BI were used. ML analyses were carried out using the program RaxML 7.0.4 [<xref rid="pone.0154794.ref051" ref-type="bibr">51</xref>] as implemented in the Cyberinfrastructure for Phylogenetic Research (CIPRES) Web Portal 1.0 (<ext-link ext-link-type="uri" xlink:href="http://www.phylo.org/sub">http://www.phylo.org/sub</ext-link>). The support values for each node were assessed using a nonparametric bootstrapping with 1,000 replicates. BI was conducted in MrBayes 3.1.2 [<xref rid="pone.0154794.ref052" ref-type="bibr">52</xref>] with two independent runs of one cold and three heated chains. Runs were performed for 50 million generations with trees sampled every 100 generations. Chain convergence was determined using Tracer v1.5 (<ext-link ext-link-type="uri" xlink:href="http://tree.bio.ed.ac.uk/software/tracer/">http://tree.bio.ed.ac.uk/software/tracer/</ext-link>) to confirm sufficiently large ESS values (> 200). The sampled trees were subsequently summarized after omitting the first 25% of trees as burn-in using the “sump” and “sumt” commands implemented in MrBayes. The default parameters were used for both methods, with convergence and burn-in assessed according to the authors’ recommendations [<xref rid="pone.0154794.ref051" ref-type="bibr">51</xref>, <xref rid="pone.0154794.ref052" ref-type="bibr">52</xref>]. The three-locus matrix was divided into three partitions, and we conducted partitioned mixed-model analysis that allowed us to estimate the model parameters separately in both BI and ML analyses. MP analyses were performed in PAUP [<xref rid="pone.0154794.ref053" ref-type="bibr">53</xref>] based on a heuristic search of 1,000 replicates with random stepwise addition using tree-bisection-reconnection branch swapping and starting with trees obtained by the stepwise addition of sequences. All of the characteristics were equally weighted and gaps were treated as missing data. Parsimony bootstrap analyses [<xref rid="pone.0154794.ref054" ref-type="bibr">54</xref>] with 1,000 replicates were subsequently performed using the fast bootstrap option to evaluate the robustness of the MP trees.</p></sec><sec id="sec007"><title>Phylogenetic lineage recognition</title><p>Phylogenetic lineages of <italic>Armillaria</italic> from China were delimited based on two criteria proposed by Dettman et al. [<xref rid="pone.0154794.ref018" ref-type="bibr">18</xref>, <xref rid="pone.0154794.ref019" ref-type="bibr">19</xref>]. A clade was assigned to a phylogenetic lineage if it fulfilled either of the following two criteria: (i) genealogical concordance: the clade was present in the majority (2/3) of the single-locus genealogies; or (ii) genealogical non-discordance: the clade was well supported in at least one single-locus genealogy (for ML, bootstrap proportions (BP) ≥ 70%, Bayesian posterior probability (PP) ≥ 0.95), and it was not contradicted in any other single-locus genealogy at the same level of support. A conflict was assumed to be significant when two different relationships (one monophyletic and the other non-monophyletic) for the same set of taxa were supported either with ML-BP ≥ 70% or BI-PP ≥ 0.95. For any clade which failed to obtain multigene sequences from at least two samples, it was also accepted as a potential independent phylogenetic lineage if it showed long branches as sequence variation from its sister groups.</p></sec></sec><sec sec-type="results" id="sec008"><title>Results</title><sec id="sec009"><title>Phylogenetic analyses</title><p>The ITS, EF1-I, and <italic>β</italic>-<italic>tubulin</italic> matrices included 101, 101 and 98 sequences, respectively. The number of nucleotides/characters (and the percentages of parsimony-informative characters) in these three matrices were 910 (12.6%), 515 (28.7%) and 850 (20.7%), respectively. For each of these three matrices, ML and BI analyses yielded similar topologies. The phylogenetic trees generated from ML analyses are shown in <xref ref-type="supplementary-material" rid="pone.0154794.s001">S1 Fig</xref>. Overall, branch resolution and support in the ITS phylogeny were lower, and only a few branches were supported by both the bootstrap and posterior probabilities, while better branch resolution and support were obtained for the trees generated from the EF1-I and <italic>β</italic>-<italic>tubulin</italic> sequences. Several well supported lineages appeared in common between the two single-locus genealogies, i.e., <italic>A</italic>. <italic>mellea</italic>, <italic>A</italic>. <italic>cepistipes</italic>, putative new Lineages 2 and 7, <italic>A</italic>. <italic>tabescens</italic> and Nag. E (<xref ref-type="supplementary-material" rid="pone.0154794.s001">S1 Fig</xref>). Concurrently, the <italic>β</italic>-<italic>tubulin</italic> data showed supported conflicts with <italic>tef1-α</italic> with regard to the placement of several phylogenetic lineages, i.e., <italic>A</italic>. <italic>ostoyae</italic>, <italic>A</italic>. <italic>sinapina</italic> and <italic>A</italic>. <italic>borealis</italic> (<xref ref-type="supplementary-material" rid="pone.0154794.s001">S1 Fig</xref>). Nevertheless, the phylogenetic signal in the individual ITS and <italic>tef1</italic>-<italic>α</italic> datasets was so strong that the incongruence from <italic>β</italic>-<italic>tubulin</italic> was eliminated in the three-locus analyses. The ML trees of the three-locus and EF1-II matrices are presented in Figs <xref ref-type="fig" rid="pone.0154794.g001">1</xref> and <xref ref-type="fig" rid="pone.0154794.g002">2</xref>, respectively. In <xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>, we label the clade including samples HKAS86579, HKAS86581, HKAS86580 and HKAS86582 as <italic>A</italic>. <italic>ostoyae</italic>, because our samples were nested in the same clade as the GenBank-retrieved sequences of European <italic>A</italic>. <italic>ostoyae</italic>, and this name is more popularly acknowledged than its putative synonym <italic>A</italic>. <italic>solidipes</italic> (<xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>). Phylogenetic analyses based on the three-locus dataset revealed five major clades (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>), while those based on the EF1-II matrix indicated six major clades (<xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>). The major differences between the trees inferred from the two matrices were as follows: (i) <italic>A</italic>. cf. <italic>borealis</italic>, which clustered into Clade II in the tree generated from the three-locus dataset (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>), formed a single clade (VI) in the phylogenetic tree from the EF1-II matrix; and (ii) <italic>A</italic>. <italic>cepistipes</italic> and <italic>A</italic>. <italic>sinapina</italic>, which clustered into Clade I (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>) in the tree of the three-locus matrix, were placed in Clade II in the EF1-II phylogeny (<xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>).</p><fig id="pone.0154794.g001" orientation="portrait" position="float"><object-id pub-id-type="doi">10.1371/journal.pone.0154794.g001</object-id><label>Fig 1</label><caption><title>Phylogenetic tree generated from the three-locus (ITS, <italic>tef1-α</italic> and <italic>β-tubulin</italic>) dataset.</title><p>The labels on the right of the phylogram indicate groups identified by phylogenetic analyses. The values of the bootstrap frequencies of ML (BP ≥ 70%), posterior probability (PP ≥ 0.95) and maximum parsimony bootstraps (PB ≥ 70%) are shown above the nodes. Thick black branches indicate high support in the analyses (ML-BP ≥ 70%, BI-PP ≥ 0.95). Green branches were concordantly supported by the majority of the loci (genealogical concordance), or were well supported by at least one locus and not contradicted by any other locus (genealogical non-concordance). Triangles at nodes indicate that all taxa united by it belong to the same phylogenetic lineage (see text for details). Taxon labels indicate strain number and geographic source. If a strain was originally identified as a CBS (Chinese biological species), the CBS taxon is listed before the strain number.</p></caption><graphic xlink:href="pone.0154794.g001"></graphic></fig><fig id="pone.0154794.g002" orientation="portrait" position="float"><object-id pub-id-type="doi">10.1371/journal.pone.0154794.g002</object-id><label>Fig 2</label><caption><title>Phylogenetic relationships between samples of <italic>Armillaria</italic> inferred from <italic>tef1-α</italic> sequences using ML analysis.</title><p>Branch support values are indicated by numbers above branches (ML-BP/BI-PP/MP-PB). Thick black branches received high support in the analyses (ML-BP ≥ 70%, BI-PP≥ 0.95). The accession numbers for the sequences retrieved from the GenBank database are listed in <xref ref-type="supplementary-material" rid="pone.0154794.s004">S1 Table</xref>.</p></caption><graphic xlink:href="pone.0154794.g002"></graphic></fig><p>The PHASE analyses inferred four haplotypes within the seven heterozygous strains (HKAS51692, HKAS45821, HKAS86559, HKAS86564, HKAS85572, HKAS85567 and HKAS86558) (<xref ref-type="supplementary-material" rid="pone.0154794.s002">S2 Fig</xref>). The phylogeny containing these haplotypes instead of heterozygous sequences is shown in <xref ref-type="fig" rid="pone.0154794.g003">Fig 3</xref>. The phylogeny (EF1-III) displayed an identical topology to the EF1-II phylogeny except for the shallow nodes surrounded by the five heterozygous samples: therefore, the deep nodes appearing in common between EF1-III and EF1-II tree are indicated by triangles.</p><fig id="pone.0154794.g003" orientation="portrait" position="float"><object-id pub-id-type="doi">10.1371/journal.pone.0154794.g003</object-id><label>Fig 3</label><caption><title>Phylogeny of <italic>Armillaria</italic> samples inferred from <italic>tef1-α</italic> DNA sequences using ML analysis to show the intraspecific level within Lineage 6.</title><p>Branch support values are indicated by numbers above branches (ML-BP/BI-PP/MP-PB). The nodes appearing in common between <xref ref-type="fig" rid="pone.0154794.g003">Fig 3</xref> and <xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref> are indicated by triangles. The species names labeled on our collections correspond to <xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>. Seven samples with heterozygous sites (HKAS45821, HKAS51692, HKAS86558, HKAS86559, HKAS86564, HKAS85567 and HKAS85572) were analyzed using PHASE 2.0 and every isolate was divided into two haploid genotypes. The four subgroups of Lineage 6 were highlighted in different colors.</p></caption><graphic xlink:href="pone.0154794.g003"></graphic></fig></sec><sec id="sec010"><title>Phylogenetic lineage recognition</title><p>At least 15 phylogenetic lineages of <italic>Armillaria</italic> were recognized from China. Among them, four (<italic>A</italic>. <italic>mellea</italic>, <italic>A</italic>. <italic>tabescens</italic>, Nag. E and Lineage 7) were strongly supported by all three genealogies (ITS, EF1-I and <italic>β-tubulin</italic>), two (<italic>A</italic>. <italic>cepistipes</italic> and Lineage 2) were strongly supported as monophyletic by ML-BP (≥ 70%) and Bayesian-PP (≥ 0.95) in two of the individual gene trees (<xref ref-type="supplementary-material" rid="pone.0154794.s001">S1 Fig</xref>; <xref ref-type="table" rid="pone.0154794.t002">Table 2</xref>), and four lineages (<italic>A</italic>. <italic>nabsnona</italic>, Lineages 1, 3 and 4) were resolved as monophyletic in one of the three individual gene trees and were not rejected by the other two matrices (<xref ref-type="table" rid="pone.0154794.t002">Table 2</xref>). The five phylogenetic lineages (Lineage 5, Lineage 6, <italic>A</italic>. <italic>sinapina</italic>, <italic>A</italic>. <italic>ostoyae</italic> and <italic>A</italic>. <italic>borealis</italic>) only formed monophyletic groups in the <italic>tef1-α</italic> gene tree. Except HKAS86573, 11 samples of Lineage 6 formed a monophyletic group (93/1.00) in the <italic>β-tubulin</italic> tree (<xref ref-type="supplementary-material" rid="pone.0154794.s001">S1 Fig</xref>). The sequences of this lineage lacked significant genetic differentiation, and the genealogical patterns were common among the three loci, so it is rational to collapse these into a single phylogenetic lineage. The branches of HKAS86569 (European <italic>A</italic>. <italic>gallica</italic>) were relatively long in all three single-locus genealogies and the combined tree revealed that Lineage 6 and European <italic>A</italic>. <italic>gallica</italic> were probably different phylogenetic lineages, accordingly (<xref ref-type="supplementary-material" rid="pone.0154794.s001">S1 Fig</xref>; <xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>). The other five phylogenetic lineages were represented by single collections (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>), thus their monophyly could not be tested. However, the five singletons (HKAS86620, HKAS86607, HKAS 85517, HKAS 86586 and HKAS 86617) showed relatively long branches compared with their sister groups: therefore, they were considered to be genetically divergent from their sisters (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>, Clades I and II). Among the 15 phylogenetic lineages as determined by the corcordance and/or non-disconcordance of the three genealogies, the monophyly of seven lineages is highly supported in the <italic>tef1-α</italic> genealogy and monophyly of 10 lineages is highly supported in the <italic>β-tubulin</italic> genealogy (<xref ref-type="supplementary-material" rid="pone.0154794.s001">S1 Fig</xref>; <xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>; <xref ref-type="table" rid="pone.0154794.t002">Table 2</xref>).</p><table-wrap id="pone.0154794.t002" orientation="portrait" position="float"><object-id pub-id-type="doi">10.1371/journal.pone.0154794.t002</object-id><label>Table 2</label><caption><title>Support values for <italic>Armillaria</italic> lineages recognized by genealogical concordance in analyses of individual gene partitions and in the combined three-locus dataset.</title><p>Values are shown as ML-BP/Bayesian-PP. Missing values (-) apply to non-monophyly.</p></caption><alternatives><graphic id="pone.0154794.t002g" xlink:href="pone.0154794.t002"></graphic><table frame="hsides" rules="groups"><colgroup span="1"><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col><col align="left" valign="middle" span="1"></col></colgroup><thead><tr><th align="left" rowspan="1" colspan="1">Independent evolutionary lineage<xref ref-type="table-fn" rid="t002fn001"><sup>1</sup></xref></th><th align="left" rowspan="1" colspan="1">ITS</th><th align="left" rowspan="1" colspan="1"><italic>tef1-α</italic></th><th align="left" rowspan="1" colspan="1"><italic>β-tubulin</italic></th><th align="left" rowspan="1" colspan="1">Criteria satisfied</th><th align="left" rowspan="1" colspan="1">Combined three-locus data <xref ref-type="table-fn" rid="t002fn002"><sup>2</sup></xref></th></tr></thead><tbody><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>borealis</italic></td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">98/1.00</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">n</td><td align="justify" rowspan="1" colspan="1">96/1.00/98</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>cepistipes</italic></td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">99/1.00</td><td align="justify" rowspan="1" colspan="1">96/1.00</td><td align="justify" rowspan="1" colspan="1">①</td><td align="justify" rowspan="1" colspan="1">100/1.00/100</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>mellea</italic></td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">①②</td><td align="justify" rowspan="1" colspan="1">100/1.00/100</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>nabsnona</italic></td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">②</td><td align="justify" rowspan="1" colspan="1">99/1.00/100</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>ostoyae</italic></td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">99/1.00</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">n</td><td align="justify" rowspan="1" colspan="1">95/1.00/91</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>sinapina</italic></td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">n</td><td align="justify" rowspan="1" colspan="1">99/1.00/94</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 1</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">81/0.97</td><td align="justify" rowspan="1" colspan="1">②</td><td align="justify" rowspan="1" colspan="1">99/1.00/82</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 2</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">95/1.00</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">①</td><td align="justify" rowspan="1" colspan="1">100/1.00/99</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 3</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">②</td><td align="justify" rowspan="1" colspan="1">100/1.00/100</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 4</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">②</td><td align="justify" rowspan="1" colspan="1">52/0.99/-</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 5</td><td align="justify" rowspan="1" colspan="1">99/1.00</td><td align="justify" rowspan="1" colspan="1">91/1.00</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">n</td><td align="justify" rowspan="1" colspan="1">85/1.00/-</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 6</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">-/-</td><td align="justify" rowspan="1" colspan="1">93/1</td><td align="justify" rowspan="1" colspan="1">n</td><td align="justify" rowspan="1" colspan="1">41/0.98/-</td></tr><tr><td align="justify" rowspan="1" colspan="1">Lineage 7</td><td align="justify" rowspan="1" colspan="1">93/1.00</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">①②</td><td align="justify" rowspan="1" colspan="1">100/1.00/100</td></tr><tr><td align="justify" rowspan="1" colspan="1"><italic>A</italic>. <italic>tabescens</italic></td><td align="justify" rowspan="1" colspan="1">98/1.00</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">①②</td><td align="justify" rowspan="1" colspan="1">100/1.00/100</td></tr><tr><td align="justify" rowspan="1" colspan="1">Nag. E</td><td align="justify" rowspan="1" colspan="1">100/1.00</td><td align="justify" rowspan="1" colspan="1">99/1.00</td><td align="justify" rowspan="1" colspan="1">96/1.00</td><td align="justify" rowspan="1" colspan="1">①②</td><td align="justify" rowspan="1" colspan="1">100/1.00/100</td></tr></tbody></table></alternatives><table-wrap-foot><fn id="t002fn001"><p><sup>1</sup> Support values not applicable for the following five potential lineages represented by single collections, which are therefore not included in the table: <italic>A</italic>. sp. (HKAS86620), <italic>A</italic>. sp. (HKAS86607), <italic>A</italic>. cf. <italic>gallica</italic> (HKAS85517), North American <italic>A</italic>. <italic>cepistipes</italic> (HKAS86586), <italic>A</italic>. cf. <italic>borealis</italic> (HKAS86617).</p></fn><fn id="t002fn002"><p><sup>2</sup> The maximum parsimony (MP) bootstrap analysis was added in the three-locus phylogeny.</p></fn><fn id="t002fn003"><p>① genealogical concordance, ② genealogical non-discordance.</p></fn><fn id="t002fn004"><p>“n” represents neither ① nor ② was fulfilled, but accepted as phylogenetic lineage, see text for details.</p></fn></table-wrap-foot></table-wrap></sec><sec id="sec011"><title>Phylogenetic lineages of <italic>Armillaria</italic> associated with Tianma</title><p>A total of 23 isolates associated with Tianma were obtained from our study. The collections associated with Tianma belonged to seven independent phylogenetic lineages, including Lineages 1 to 3, <italic>A</italic>. <italic>nabsnona</italic>, Nag. E, <italic>A</italic>. <italic>cepistipes</italic>, and Lineage 6 (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>). Nag. E was recorded to be associated with Tianma for the first time by this study. Among these seven phylogenetic lineages, the strains of Lineage 2 and Lineage 6 are the most commonly used in the cultivation of Tianma (authors’ personal observations), accounting for 22% (5 out of 23) and 30% (7 out of 23) of the strains, respectively (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>).</p></sec></sec><sec sec-type="conclusions" id="sec012"><title>Discussion</title><sec id="sec013"><title>Phylogenetic lineage diversity of <italic>Armillaria</italic> in China and the assignment of 14 CBS</title><p>Our study revealed a high diversity of <italic>Armillaria</italic> species in China. At least 15 phylogenetic lineages were recognized (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>), 10 of which were represented by two or more collections and could be supported by the GCPSR criteria of Dettman et al. [<xref rid="pone.0154794.ref019" ref-type="bibr">19</xref>]. The grouping of the samples of the remaining five lineages did not strictly satisfy either genealogical concordance or genealogical non-disconcordance. The major conflict was between the genealogies of <italic>tef1</italic>-<italic>α</italic> and <italic>β-tubulin</italic>. For example, the samples of Lineage 5 were well supported in the <italic>tef1</italic>-<italic>α</italic> tree but collapsed into two subgroups in the <italic>β-tubulin</italic> genealogy (<xref ref-type="supplementary-material" rid="pone.0154794.s001">S1 Fig</xref>). The monophyly of four isolates of <italic>A</italic>. <italic>ostoyae</italic> was supported in the <italic>tef1</italic>-<italic>α</italic> tree. However, these isolates collapsed into two subgroups in the <italic>β-tubulin</italic> tree, one group was nested with a subgroup of Lineage 5 and the other one was cluster with sample of <italic>A</italic>. <italic>borealis</italic>, respectively. The samples of <italic>A</italic>. <italic>sinapina</italic> formed a monophyletic clade in the <italic>tef1</italic>-<italic>α</italic> genealogy but split into three divergent subgroups in the <italic>β-tubulin</italic> tree. Nevertheless, considering the high support values in the combined tree, we took these clades as independent phylogenetic lineages. The remaining five potential phylogenetic lineages were each represented by a single strain (HKAS86620, HKAS86607, HKAS85517, HKAS86586 and HKAS86617) but showed relatively long branches, seeming to suggest obvious genetic divergence from their close relatives (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>).</p><p>The 14 CBS proposed based on mating tests could be assigned to specific phylogenetic lineages with the help of our multigene data. Coetzee et al. [<xref rid="pone.0154794.ref030" ref-type="bibr">30</xref>] analyzed these CBS using the sequences of <italic>tef1</italic>-<italic>α</italic> and IGS-1. They revealed four main phylogenetic groups and named them the “<italic>A</italic>. <italic>ostoyae</italic>”, “<italic>A</italic>. <italic>gallica</italic>”, “<italic>A</italic>. <italic>tabescens</italic>” and “<italic>A</italic>. <italic>mellea</italic>” clusters. However, no clear assignment of these CBS was provided in their study. In our analyses, some unexpected relationships between CBS and phylogenetic lineages were indicated. Two types of correspondence among the CBS and the phylogenetic lineages were suggested by our data (<xref ref-type="fig" rid="pone.0154794.g004">Fig 4</xref>). The first type showed clear relationships among the phylogenetic lineages and the CBS, and could be divided into three subtypes: (i) one CBS to one phylogenetic lineage; this included CBS A, B, C, D, O and I, which could be assigned to <italic>A</italic>. <italic>sinapina</italic>, Lineage 6, Lineage 5, <italic>A</italic>. <italic>ostoyae</italic>, Lineage 2 and <italic>A</italic>. <italic>tabescens</italic>, respectively; (ii) one CBS to two phylogenetic lineages; this was represented by CBS F, which was divided into two subgroups, provisionally named <italic>A</italic>. <italic>cepistipes</italic> and North American <italic>A</italic>. <italic>cepistipes</italic>; and (iii) two CBS to one phylogenetic lineage; this included CBS G and K, which were merged into <italic>A</italic>. <italic>mellea</italic>. The second type was much more complicated. This type included two groups of CBS: (i) the group consisting of CBS M and J, both of which were separated into two phylogenetic lineages, but shared Lineage 4, represented by CBS H; and (ii) the group consisting of CBS L and N, both of which were divided into two lineages, but shared Lineage 1.</p><fig id="pone.0154794.g004" orientation="portrait" position="float"><object-id pub-id-type="doi">10.1371/journal.pone.0154794.g004</object-id><label>Fig 4</label><caption><title>The link between 14 CBS (Chinese Biological Species) and phylogenetic lineages identified in this study.</title><p>CBS were recognized in previous studies and phylogenetic lineages were delimited in this study. The m/n on the arrows between “CBS” and “phylogenetic lineage” means that m of n isolates of a CBS were assigned to phylogenetic lineages.</p></caption><graphic xlink:href="pone.0154794.g004"></graphic></fig><p>Our multigene data provided several notable new insights into the treatment of the CBS. Some incompatible CBS presented the same phylogenetic lineage. For example, the homothallic strains of CBS G have been reported as almost incompatible with the heterothallic strains of CBS K. However, they nested within the <italic>A</italic>. <italic>mellea</italic> clade with strong support (100/1/99) (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>, Clade IV) in our phylogenetic analyses. Similar observations have also been made for other fungal groups. For example, the homothallic and heterothallic biotypes of the pathogen <italic>Moniliophthora perniciosa</italic> were not inter-fertile, presumably because genetic barriers have evolved since the biotypes diverged [<xref rid="pone.0154794.ref055" ref-type="bibr">55</xref>]. Thus, it is quite reasonable to accept CBS G and K as a single phylogenetic lineage. In contrast, some compatible strains of a biological species could be further divided into two or more phylogenetic lineages. For instance, CBS M, which has been demonstrated to be compatible with European <italic>A</italic>. <italic>borealis</italic>, could be divided into two monophyletic clades. The scenario whereby one biological species actually encompasses more than one phylogenetic lineage has been discussed in the context of European <italic>Armillaria</italic> collections [<xref rid="pone.0154794.ref024" ref-type="bibr">24</xref>]. A similar phenomenon was observed for CBS F. This biological species has been suggested to be conspecific to <italic>A</italic>. <italic>singula</italic>, which was originally described from Japan, on the basis of its basidioma morphology [<xref rid="pone.0154794.ref011" ref-type="bibr">11</xref>], or to represent a novel taxon closely related to <italic>A</italic>. <italic>cepistipes</italic>, <italic>A</italic>. <italic>calvescens</italic>, <italic>A</italic>. <italic>gallica</italic> and <italic>A</italic>. <italic>sinapina</italic>, based on phylogenetic analyses of the IGS-1 region [<xref rid="pone.0154794.ref026" ref-type="bibr">26</xref>]. Although no compatibility reaction emerged between the isolates of CBS F and European or North American <italic>A</italic>. <italic>cepistipes</italic> [<xref rid="pone.0154794.ref032" ref-type="bibr">32</xref>], most of the CBS F isolates were grouped with those of <italic>A</italic>. <italic>cepistipes</italic> from Japan and Europe into a common sub-clade with high support in the <italic>tef1</italic>-<italic>α</italic> tree, and the isolate HKAS86586 was unexpectedly grouped with the North American <italic>A</italic>. <italic>cepistipes</italic> (<xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>). Thus, it is reasonable to identify the isolates of CBS F as <italic>A</italic>. <italic>cepistipes</italic> and the closely related “North American <italic>A</italic>. <italic>cepistipes</italic>”.</p></sec><sec id="sec014"><title>Relationships between <italic>Armillaria</italic> from China and other regions of the world</title><p>By comparing <italic>tef1</italic>-<italic>α</italic> sequences from our study with sequences from the GenBank database, we explored the phylogenetic relationships between Chinese <italic>Armillaria</italic> isolates and those from other parts of the world. Of the recognized taxa, <italic>A</italic>. <italic>mellea</italic> and <italic>A</italic>. <italic>tabescens</italic> have been reported to be widely distributed in the Northern Hemisphere. However, we found significant genetic divergence among isolates of each of these two species from different continents (Figs <xref ref-type="fig" rid="pone.0154794.g001">1</xref> and <xref ref-type="fig" rid="pone.0154794.g002">2</xref>), indicating genetic isolation among populations from different continents. Nevertheless, it is surprising that the homothallic <italic>A</italic>. <italic>mellea</italic> from Southwest China (HKAS86590) and East Africa (HKAS86600) were phylogenetically very close to those gathered from Europe (<xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>). Furthermore, the African samples of homothallic <italic>A</italic>. <italic>mellea</italic> (HKAS86598 and HKAS86599) were grouped within a sub-clade of predominantly East Asian samples (Figs <xref ref-type="fig" rid="pone.0154794.g001">1</xref> and <xref ref-type="fig" rid="pone.0154794.g002">2</xref>). This is similar to observations reported previously [<xref rid="pone.0154794.ref015" ref-type="bibr">15</xref>, <xref rid="pone.0154794.ref056" ref-type="bibr">56</xref>]. The disjunction of closely related species of <italic>Armillaria</italic> between China and Africa is probably due to recent human-mediated introductions, which was also suggested by biogeographic studies of other fungi, such as <italic>Favolaschia</italic>, <italic>Serpula</italic> and <italic>Pleurotus</italic> [<xref rid="pone.0154794.ref057" ref-type="bibr">57</xref>–<xref rid="pone.0154794.ref059" ref-type="bibr">59</xref>]. <italic>Armillaria gallica</italic> has also been recorded from different continents of the Northern Hemisphere. Our study indicated that the samples recognized as <italic>A</italic>. <italic>gallica</italic> from East Asia and North America were genetically strongly divergent from European <italic>A</italic>. <italic>gallica</italic>. In total, two phylogenetic lineages could be plausibly inferred for “<italic>A</italic>. <italic>gallica</italic>” (<xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>). Most of the samples from China previously considered as <italic>A</italic>. <italic>gallica</italic>, now represented a new phylogenetic lineage (Lineage 6) according to our analyses, and one specimen (HKAS85517) from Xinjiang (XJ) together with two <italic>A</italic>. <italic>gallica</italic> samples from Japan formed another clade, while the <italic>A</italic>. <italic>gallica</italic> from North America formed a separate clade (<xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>). This is similar to previous reports [<xref rid="pone.0154794.ref060" ref-type="bibr">60</xref>]. In addition, significant heterozygous sites were detected in the <italic>tef1</italic>-<italic>α</italic> sequences of six strains within Lineage 6 (HKAS45821, HKAS86559, HKAS86564, HKAS85572, HKAS85567 and HKAS86558). After including these haplotypes in the phylogenetic analyses, we found that the two alleles of some strains (HKAS51692 and HKAS45821) were clustered into different phylogenetic lineages (<xref ref-type="fig" rid="pone.0154794.g003">Fig 3</xref>), indicating that hybridization could occur among different phylogenetic subgroups. Hybridization events commonly occurr in pathogenic fungi [<xref rid="pone.0154794.ref061" ref-type="bibr">61</xref>–<xref rid="pone.0154794.ref064" ref-type="bibr">64</xref>]. Interspecific hybridization has only been reported for three Basidiomycota: <italic>Coniophora puteana</italic> [<xref rid="pone.0154794.ref065" ref-type="bibr">65</xref>], <italic>Flammulina velutipes</italic> [<xref rid="pone.0154794.ref066" ref-type="bibr">66</xref>] and <italic>Tricholoma scalpturatum</italic> [<xref rid="pone.0154794.ref067" ref-type="bibr">67</xref>]. Even if direct evidence is still lacking, some <italic>Armillaria</italic> species may have interspecific hybridization potential because they already have a broad range of hosts.</p><p>The phylogenetic lineages shared between East Asia and Europe included <italic>A</italic>. <italic>borealis</italic>, <italic>A</italic>. cf. <italic>borealis</italic>, <italic>A</italic>. <italic>ostoyae</italic> and <italic>A</italic>. <italic>cepistipes</italic>. We found that the Chinese isolates of “<italic>A</italic>. <italic>borealis</italic>” encompassed two lineages (Figs <xref ref-type="fig" rid="pone.0154794.g001">1</xref> and <xref ref-type="fig" rid="pone.0154794.g002">2</xref>). Similarly, European “<italic>A</italic>. <italic>borealis</italic>” has also been reported as two divergent lineages [<xref rid="pone.0154794.ref060" ref-type="bibr">60</xref>]. The isolates HKAS56108 and HKAS76263 were grouped into the <italic>A</italic>. <italic>borealis</italic> lineage, and the isolate HKAS86617 was grouped into <italic>A</italic>. cf. <italic>borealis</italic> (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>). Samples of <italic>A</italic>. <italic>ostoyae</italic> from northeastern China, Japan and Europe were grouped into a highly supported lineage. Based on morphological observations, Burdsall & Volk [<xref rid="pone.0154794.ref003" ref-type="bibr">3</xref>] have proposed that <italic>A</italic>. <italic>solidipes</italic> Peck, originally described from North America, is an older name for <italic>A</italic>. <italic>ostoyae</italic>, originally described from Europe. Our phylogenetic analysis indicated that the North American <italic>A</italic>. <italic>solidipes</italic> was sister to its sympatric <italic>A</italic>. <italic>gemina</italic> rather than the Eurasian <italic>A</italic>. <italic>ostoyae</italic>. We thus provisionally assign the North American isolates to <italic>A</italic>. <italic>solidipes</italic> and the Eurasian isolates to <italic>A</italic>. <italic>ostoyae</italic>.</p><p><italic>Armillaria nabsnona</italic>, North American <italic>A</italic>. <italic>cepistipes</italic> and <italic>A</italic>. <italic>sinapina</italic> are common in East Asia and North America. Isolates from coastal western North America, Japan and southwestern China exhibited great genetic differentiation within <italic>A</italic>. <italic>nabsnona</italic> and formed three subclades. The isolates from North America, Japan and northeastern China showed limited genetic variation in <italic>A</italic>. <italic>sinapina</italic>. The North American <italic>A</italic>. <italic>cepistipes</italic> is distributed in North America and Northeast China, and is genetically divergent from the East Asian–European <italic>A</italic>. <italic>cepistipes</italic> lineage (<xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>). The relationships between “<italic>A</italic>. <italic>cepistipes</italic>” in North America and East Asia can only be elucidated when more collections are available.</p><p>The phylogenetic lineages restricted to East Asia were Nag. E and Lineage 6. Nag. E is a biological species previously identified in Japan by Ota et al. [<xref rid="pone.0154794.ref068" ref-type="bibr">68</xref>]. Phylogenetically, it is closely related to <italic>A</italic>. <italic>nabsnona</italic> (Clade I in <xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>). Four isolates within Lineage 6 belong to CBS B, and CBS B was assigned to <italic>A</italic>. <italic>gallica</italic> previously. Prior to this study, <italic>A</italic>. <italic>gallica</italic> had also been recorded from China and Japan [<xref rid="pone.0154794.ref011" ref-type="bibr">11</xref>, <xref rid="pone.0154794.ref068" ref-type="bibr">68</xref>, <xref rid="pone.0154794.ref069" ref-type="bibr">69</xref>]. Interestingly, we found that the “<italic>A</italic>. <italic>gallica</italic>” from East Asia was genetically different from European <italic>A</italic>. <italic>gallica</italic>. In our phylogenetic analyses, the tester strain of <italic>A</italic>. <italic>gallica</italic> from Europe (HKAS86569) was genetically differentiated from samples of “<italic>A</italic>. <italic>gallica</italic>” from other regions (Figs <xref ref-type="fig" rid="pone.0154794.g001">1</xref> and <xref ref-type="fig" rid="pone.0154794.g002">2</xref>). HKAS86569 formed a congruent genetic pattern (displayed as substitutions) in the alignments of three loci within the lineage, suggesting that it may represent a different phylogenetic species from Lineage 6 (Figs <xref ref-type="fig" rid="pone.0154794.g001">1</xref> and <xref ref-type="fig" rid="pone.0154794.g002">2</xref>; <xref ref-type="supplementary-material" rid="pone.0154794.s001">S1 Fig</xref>). Our samples (HKAS45821 and HKAS85517) were closely aligned with the Japanese “<italic>A</italic>. <italic>gallica</italic>” (<xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>). We propose that <italic>A</italic>. <italic>gallica</italic> is restricted to Europe and the “<italic>A</italic>. <italic>gallica</italic>” in East Asia and North America are not conspecific with the European <italic>A</italic>. <italic>gallica</italic>. Moreover, our phylogenetic analyses indicated that the currently recognized <italic>A</italic>. <italic>gallica</italic> is polyphyletic and probably comprises cryptic species (<xref ref-type="fig" rid="pone.0154794.g002">Fig 2</xref>), in accordance with the findings of Klopfenstein et al. [<xref rid="pone.0154794.ref060" ref-type="bibr">60</xref>]. To determine the phylogenetic relationships of these putative <italic>A</italic>. <italic>gallica</italic> collections, seven haplotypes from <italic>tef1</italic>-<italic>α</italic> sequences were detected within 17 samples (<xref ref-type="supplementary-material" rid="pone.0154794.s002">S2 Fig</xref>), and the phylogenetic tree inferred from the EF1-III dataset, which included these haplotypes, indicated that Lineage 6 could be split into four subgroups, providing preliminary evidence for ongoing speciation (<xref ref-type="fig" rid="pone.0154794.g003">Fig 3</xref>).</p><p>Most of the newly identified phylogenetic lineages in Clade I and Clade III (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>) are restricted to China. Lineage 1 is distributed from Southwest to Northeast China in broad-leaved forests. The two sympatric phylogenetic lineages, Lineage 2 and Lineage 3, are restricted to Yunnan and Guizhou, Southwest China, and Lineage 5 is found only in Northeast China. In contrast, Lineage 4 is widely distributed in China from the northeastern to the central, southwestern and northwestern parts. Among the nine new phylogenetic lineages identified in this study, Lineage 7 was significantly different from the other species in phylogenetic position. It was formed of a single clade (Clade III) while Lineages 1 to 6 were nested within Clade I (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>).</p></sec><sec id="sec015"><title><italic>Armillaria</italic> associated with Tianma in China</title><p>Prior to this study, six species (including subspecies) of <italic>Armillaria</italic>, namely <italic>A</italic>. <italic>cepistipes</italic>, <italic>A</italic>. <italic>gallica</italic>, <italic>A</italic>. <italic>mellea</italic> subsp. <italic>nipponica</italic>, <italic>A</italic>. <italic>jezoensis</italic> J.Y. Cha & Igarashi, <italic>A</italic>. <italic>tabescens</italic> and <italic>A</italic>. <italic>nabsnona</italic>, had been reported to be associated or form symbiotic relationships with <italic>Gastrodia elata</italic> in Japan [<xref rid="pone.0154794.ref007" ref-type="bibr">7</xref>, <xref rid="pone.0154794.ref070" ref-type="bibr">70</xref>]. Our study indicated that <italic>A</italic>. <italic>cepistipes</italic> and <italic>A</italic>. <italic>nabsnona</italic> could be associated with Tianma in China (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>). However, we found no evidence for the symbiosis between Tianma and the other four <italic>Armillaria</italic> species based on our data. In contrast, four additional phylogenetic lineages, namely Lineages 2, 3, 6 and Nag. E, were found to be associated with the cultivation of Tianma in China (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>). The collections of Lineage 4 (HKAS85594) and <italic>A</italic>. <italic>mellea</italic> (HKAS85471) were taken from Tianma plantations. However, no direct evidence showed that strains within them could be used for Tianma cultivation. Interestingly, two common features could be found among the <italic>Armillaria</italic> strains suitable for Tianma cultivation: (i) they possibly belonged to saprotrophic/low-pathogenic phylogenetic lineages (<xref ref-type="fig" rid="pone.0154794.g001">Fig 1</xref>, Clade I); and (ii) their mycelia had a fast growth speed and could form vigorous and stout rhizomorphs, the branching patterns of which were was monopodial (<xref ref-type="supplementary-material" rid="pone.0154794.s003">S3 Fig</xref>). Morrison revealed that species producing monopodially branched rhizomorphs, i.e., <italic>A</italic>. <italic>gallica</italic>, <italic>A</italic>. <italic>nabsnona</italic> and <italic>A</italic>. <italic>cepistipes</italic>, were less aggressive than dichotomously branched species (<italic>A</italic>. <italic>mellea</italic>, <italic>A</italic>. <italic>borealis</italic> and <italic>A</italic>. <italic>ostoyae</italic>) [<xref rid="pone.0154794.ref071" ref-type="bibr">71</xref>]. We hypothesize that the low-pathogenic (less virulent and aggressive) character of these species helps <italic>Armillaria</italic> to establish a symbiotic relationship with Tianma, rather than causing disease to tubers, while the rapid growth of mycelia and the healthy development of rhizomorphs greatly improves the ability of <italic>Armillaria</italic> to derive water and nutrition from the soil or rotten wood and share them with the tubers of Tianma.</p><p>Two different cultivars of Tianma, “Brown Tianma” (<italic>G</italic>. <italic>elata</italic> f. <italic>glauca</italic>) and “Red Tianma” (<italic>G</italic>. <italic>elata</italic> f. <italic>elata</italic>), are widely cultivated in China [<xref rid="pone.0154794.ref072" ref-type="bibr">72</xref>]. The former is mainly produced in southwest China (Sichuan, northeastern Yunnan and western Guizhou provinces), and the latter is widely cultivated in southwest, central, north and northeast China. Our study revealed that different phylogenetic lineages of <italic>Armillaria</italic> had different cultivation patterns with Tianma. Brown Tianma was associated with strains of <italic>A</italic>. <italic>nabsnona</italic>, <italic>A</italic>. <italic>cepistipes</italic>, Lineage 2, Nag. E, Lineage 3 and Lineage 6, while Red Tianma was only associated with Lineage 6. Our investigation revealed that two strains of Lineage 6 (HKAS86560 and HKAS86558) were widely considered as good promoters for the cultivation of Tianma in central China, and that a few strains belonging to Lineage 2 and Lineage 3 were widely used for the cultivation of Tianma in southwest China (Yunnan, Sichuan and Guizhou provinces). Although the strains of Lineage 6 were introduced into Zhaotong, Yunnan Province to achieve high yields of Brown Tianma, they proved uncompetitive compared with the local strains of <italic>A</italic>. <italic>cepistipes</italic> (HKAS86542), Lineage 2 (HKAS86543) and <italic>A</italic>. <italic>nabsnona</italic> (HKAS86544). These findings strongly suggest that native and/or naturalized <italic>Armillaria</italic> strains should be selected for the cultivation of Tianma, which has also been suggested for the selection of species for agroforestry [<xref rid="pone.0154794.ref073" ref-type="bibr">73</xref>].</p></sec></sec><sec sec-type="supplementary-material" id="sec016"><title>Supporting Information</title><supplementary-material content-type="local-data" id="pone.0154794.s001"><label>S1 Fig</label><caption><title>Phylogenetic trees inferred from the maximum likelihood (ML) analysis with branch support obtained by ML and BI analyses based on ITS, <italic>tef1</italic>-α and <italic>β</italic>-<italic>tubulin</italic> sequences, respectively.</title><p>Branch support values are indicated by numbers above branches (ML-BP/BI-PP). Thick black branches received high support in the analyses (ML-BP ≥ 70%, BI-PP ≥ 0.95). Taxon labels indicate strain number and geographic source. Branches showing supported conflict with single gene phylogenies are highlighted in different colors.</p><p>(PDF)</p></caption><media xlink:href="pone.0154794.s001.pdf"><caption><p>Click here for additional data file.</p></caption></media></supplementary-material><supplementary-material content-type="local-data" id="pone.0154794.s002"><label>S2 Fig</label><caption><title>Best haplotype reconstruction of seven samples with heterozygous sites.</title><p>(PDF)</p></caption><media xlink:href="pone.0154794.s002.pdf"><caption><p>Click here for additional data file.</p></caption></media></supplementary-material><supplementary-material content-type="local-data" id="pone.0154794.s003"><label>S3 Fig</label><caption><title>The rhizomorphs development of strains associated with Tianma.</title><p>The strains of a-f were associated with Tianma cultivation and strains of g-h could not be used for Tianma cultivation. a and b: Lineage 6 (HKAS86560, HKAS86558); c: <italic>A</italic>. <italic>nabsnona</italic> (HKAS86544); d: Lineage 2 (HKAS86543); e: <italic>A</italic>. <italic>cepistipes</italic> (HKAS86542); f: Nag. E (HKAS86549); g: Lineage 1 (HKAS85457); h: <italic>A</italic>. <italic>mellea</italic> (HKAS85471).</p><p>(PDF)</p></caption><media xlink:href="pone.0154794.s003.pdf"><caption><p>Click here for additional data file.</p></caption></media></supplementary-material><supplementary-material content-type="local-data" id="pone.0154794.s004"><label>S1 Table</label><caption><title><italic>Tef1</italic>-α sequences from GenBank used in this study and their accession numbers.</title><p>(DOC)</p></caption><media xlink:href="pone.0154794.s004.doc"><caption><p>Click here for additional data file.</p></caption></media></supplementary-material></sec></body><back><ack><p>The authors thank Drs. Zai-Wei Ge, Yan-Chun Li and Xiang-Hua Wang and Jiao Qin (Kunming Institute of Botany, CAS) for providing specimens. We are also very grateful to Drs. Bang Feng and Xiang-Hua Wang (Kunming Institute of Botany, CAS) for the improvement of the manuscript. 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