Fitness dynamics within a poplar hybrid zone: I. Prezygotic and postzygotic barriers impacting a native poplar hybrid stand
Identifieur interne : 000230 ( Ncbi/Merge ); précédent : 000229; suivant : 000231Fitness dynamics within a poplar hybrid zone: I. Prezygotic and postzygotic barriers impacting a native poplar hybrid stand
Auteurs : Amanda D. Roe [Canada] ; Chris J K. Macquarrie [Canada] ; Marie-Claude Gros-Louis [Canada] ; J Dale Simpson [Canada] ; Josyanne Lamarche [Canada] ; Tannis Beardmore [Canada] ; Stacey L. Thompson [Canada, Suède] ; Philippe Tanguay [Canada] ; Nathalie Isabel [Canada]Source :
- Ecology and Evolution [ 2045-7758 ] ; 2014.
Abstract
Hybridization and introgression are pervasive evolutionary phenomena that provide insight into the selective forces that maintain species boundaries, permit gene flow, and control the direction of evolutionary change. Poplar trees (
Url:
DOI: 10.1002/ece3.1029
PubMed: 24967081
PubMed Central: 4063464
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<series><title level="j">Ecology and Evolution</title>
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<front><div type="abstract" xml:lang="en"><p>Hybridization and introgression are pervasive evolutionary phenomena that provide insight into the selective forces that maintain species boundaries, permit gene flow, and control the direction of evolutionary change. Poplar trees (<italic>Populus</italic>
L.) are well known for their ability to form viable hybrids and maintain their distinct species boundaries despite this interspecific gene flow. We sought to quantify the hybridization dynamics and postzygotic fitness within a hybrid stand of balsam poplar (<italic>Populus balsamifera</italic>
L.), eastern cottonwood (<italic>P. deltoides</italic>
Marsh.), and their natural hybrids to gain insight into the barriers maintaining this stable hybrid zone. We observed asymmetrical hybrid formation with <italic>P. deltoides</italic>
acting as the seed parent, but with subsequent introgression biased toward <italic>P. balsamifera</italic>
. Native hybrids expressed fitness traits intermediate to the parental species and were not universally unfit. That said, native hybrid seedlings were absent from the seedling population, which may indicate additional selective pressures controlling their recruitment. It is imperative that we understand the selective forces maintaining this native hybrid zone in order to quantify the impact of exotic poplar hybrids on this native system.</p>
</div>
</front>
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<pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Ecol Evol</journal-id>
<journal-id journal-id-type="iso-abbrev">Ecol Evol</journal-id>
<journal-id journal-id-type="publisher-id">ece3</journal-id>
<journal-title-group><journal-title>Ecology and Evolution</journal-title>
</journal-title-group>
<issn pub-type="ppub">2045-7758</issn>
<issn pub-type="epub">2045-7758</issn>
<publisher><publisher-name>BlackWell Publishing Ltd</publisher-name>
<publisher-loc>Oxford, UK</publisher-loc>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">24967081</article-id>
<article-id pub-id-type="pmc">4063464</article-id>
<article-id pub-id-type="doi">10.1002/ece3.1029</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Original Research</subject>
</subj-group>
</article-categories>
<title-group><article-title>Fitness dynamics within a poplar hybrid zone: I. Prezygotic and postzygotic barriers impacting a native poplar hybrid stand</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Roe</surname>
<given-names>Amanda D</given-names>
</name>
<xref ref-type="aff" rid="au1">1</xref>
<xref ref-type="aff" rid="au2">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>MacQuarrie</surname>
<given-names>Chris J K</given-names>
</name>
<xref ref-type="aff" rid="au2">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Gros-Louis</surname>
<given-names>Marie-Claude</given-names>
</name>
<xref ref-type="aff" rid="au1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Simpson</surname>
<given-names>J Dale</given-names>
</name>
<xref ref-type="aff" rid="au3">3</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Lamarche</surname>
<given-names>Josyanne</given-names>
</name>
<xref ref-type="aff" rid="au1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Beardmore</surname>
<given-names>Tannis</given-names>
</name>
<xref ref-type="aff" rid="au3">3</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Thompson</surname>
<given-names>Stacey L</given-names>
</name>
<xref ref-type="aff" rid="au1">1</xref>
<xref ref-type="aff" rid="au4">4</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Tanguay</surname>
<given-names>Philippe</given-names>
</name>
<xref ref-type="aff" rid="au1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Isabel</surname>
<given-names>Nathalie</given-names>
</name>
<xref ref-type="aff" rid="au1">1</xref>
</contrib>
<aff id="au1"><label>1</label>
<institution>Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre</institution>
<addr-line>Québec, Québec, Canada</addr-line>
</aff>
<aff id="au2"><label>2</label>
<institution>Natural Resources Canada, Canadian Forestry Centre, Great Lakes Forestry Centre</institution>
<addr-line>Sault Ste. Marie, Ontario, Canada</addr-line>
</aff>
<aff id="au3"><label>3</label>
<institution>Natural Resources Canada, Canadian Forest Service, Atlantic Forestry Centre</institution>
<addr-line>Fredericton, New Brunswick, Canada</addr-line>
</aff>
<aff id="au4"><label>4</label>
<institution>Umeå University, Ecology and Environmental Sciences, Umeå Plant Science Centre</institution>
<addr-line>Umeå, Sweden</addr-line>
</aff>
</contrib-group>
<author-notes><corresp id="cor1">Amanda D. Roe, Natural Resources Canada, Canadian Forest Service, Sault Ste. Marie, 112 Denwood Dr. Sault Ste. Marie, Ontario, Canada P6A 6T3. Tel: +1-705-256-1013; Fax: +1-418-648-5849; E-mail: <email>amandaroe5@gmail.com</email>
Nathalie Isabel, Natural Resources Canada, Canadian Forest Service, 1055 rue du P.E.P.S., C.P. 10380 succ. Saint-Foy, Québec, Québec, Canada G1V 4C7. Tel: +1-418-648-7137; Fax: +1-418-648-5849; E-mail:<email>nathalie.isabel@rncan-nrcan.gc.ca</email>
</corresp>
<fn><p><bold>Funding Information</bold>
This work was funded through a Canadian Regulatory System for Biotechnology grant to NI as well as through the Visiting Fellowship in Canadian Government Laboratories program of the Natural Sciences and Engineering Research Council of Canada to ADR.</p>
</fn>
</author-notes>
<pub-date pub-type="ppub"><month>5</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub"><day>03</day>
<month>4</month>
<year>2014</year>
</pub-date>
<volume>4</volume>
<issue>9</issue>
<fpage>1629</fpage>
<lpage>1647</lpage>
<history><date date-type="received"><day>26</day>
<month>8</month>
<year>2013</year>
</date>
<date date-type="rev-recd"><day>20</day>
<month>12</month>
<year>2013</year>
</date>
<date date-type="accepted"><day>31</day>
<month>12</month>
<year>2013</year>
</date>
</history>
<permissions><copyright-statement>© 2014 Natural Resources Canada. <italic>Ecology and Evolution</italic>
published by John Wiley & Sons Ltd.</copyright-statement>
<copyright-year>2014</copyright-year>
<license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/3.0/"><license-p>This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.</license-p>
</license>
</permissions>
<abstract><p>Hybridization and introgression are pervasive evolutionary phenomena that provide insight into the selective forces that maintain species boundaries, permit gene flow, and control the direction of evolutionary change. Poplar trees (<italic>Populus</italic>
L.) are well known for their ability to form viable hybrids and maintain their distinct species boundaries despite this interspecific gene flow. We sought to quantify the hybridization dynamics and postzygotic fitness within a hybrid stand of balsam poplar (<italic>Populus balsamifera</italic>
L.), eastern cottonwood (<italic>P. deltoides</italic>
Marsh.), and their natural hybrids to gain insight into the barriers maintaining this stable hybrid zone. We observed asymmetrical hybrid formation with <italic>P. deltoides</italic>
acting as the seed parent, but with subsequent introgression biased toward <italic>P. balsamifera</italic>
. Native hybrids expressed fitness traits intermediate to the parental species and were not universally unfit. That said, native hybrid seedlings were absent from the seedling population, which may indicate additional selective pressures controlling their recruitment. It is imperative that we understand the selective forces maintaining this native hybrid zone in order to quantify the impact of exotic poplar hybrids on this native system.</p>
</abstract>
<kwd-group><kwd>Hybrid fitness</kwd>
<kwd>hybridization</kwd>
<kwd>introgression</kwd>
<kwd>postzygotic fitness</kwd>
<kwd>reproductive fitness</kwd>
<kwd>SNPs</kwd>
</kwd-group>
</article-meta>
</front>
</pmc>
<affiliations><list><country><li>Canada</li>
<li>Suède</li>
</country>
</list>
<tree><country name="Canada"><noRegion><name sortKey="Roe, Amanda D" sort="Roe, Amanda D" uniqKey="Roe A" first="Amanda D" last="Roe">Amanda D. Roe</name>
</noRegion>
<name sortKey="Beardmore, Tannis" sort="Beardmore, Tannis" uniqKey="Beardmore T" first="Tannis" last="Beardmore">Tannis Beardmore</name>
<name sortKey="Gros Louis, Marie Claude" sort="Gros Louis, Marie Claude" uniqKey="Gros Louis M" first="Marie-Claude" last="Gros-Louis">Marie-Claude Gros-Louis</name>
<name sortKey="Isabel, Nathalie" sort="Isabel, Nathalie" uniqKey="Isabel N" first="Nathalie" last="Isabel">Nathalie Isabel</name>
<name sortKey="Lamarche, Josyanne" sort="Lamarche, Josyanne" uniqKey="Lamarche J" first="Josyanne" last="Lamarche">Josyanne Lamarche</name>
<name sortKey="Macquarrie, Chris J K" sort="Macquarrie, Chris J K" uniqKey="Macquarrie C" first="Chris J K" last="Macquarrie">Chris J K. Macquarrie</name>
<name sortKey="Roe, Amanda D" sort="Roe, Amanda D" uniqKey="Roe A" first="Amanda D" last="Roe">Amanda D. Roe</name>
<name sortKey="Simpson, J Dale" sort="Simpson, J Dale" uniqKey="Simpson J" first="J Dale" last="Simpson">J Dale Simpson</name>
<name sortKey="Tanguay, Philippe" sort="Tanguay, Philippe" uniqKey="Tanguay P" first="Philippe" last="Tanguay">Philippe Tanguay</name>
<name sortKey="Thompson, Stacey L" sort="Thompson, Stacey L" uniqKey="Thompson S" first="Stacey L" last="Thompson">Stacey L. Thompson</name>
</country>
<country name="Suède"><noRegion><name sortKey="Thompson, Stacey L" sort="Thompson, Stacey L" uniqKey="Thompson S" first="Stacey L" last="Thompson">Stacey L. Thompson</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>
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