Genetic isolation between two recently diverged populations of a symbiotic fungus
Identifieur interne : 000821 ( Main/Exploration ); précédent : 000820; suivant : 000822Genetic isolation between two recently diverged populations of a symbiotic fungus
Auteurs : Sara Branco [États-Unis] ; Pierre Gladieux [France] ; Christopher E. Ellison [États-Unis] ; Alan Kuo [États-Unis] ; Kurt Labutti [États-Unis] ; Anna Lipzen [États-Unis] ; Igor V. Grigoriev [États-Unis] ; Hui-Ling Liao [États-Unis] ; Rytas Vilgalys [États-Unis] ; Kabir G. Peay [États-Unis] ; John W. Taylor [États-Unis] ; Thomas D. Bruns [États-Unis]Source :
- Molecular Ecology [ 0962-1083 ] ; 2015-06.
Abstract
Fungi are an omnipresent and highly diverse group of organisms, making up a significant part of eukaryotic diversity. Little is currently known about the drivers of fungal population differentiation and subsequent divergence of species, particularly in symbiotic, mycorrhizal fungi. Here, we investigate the population structure and environmental adaptation in Suillus brevipes (Peck) Kuntze, a wind‐dispersed soil fungus that is symbiotic with pine trees. We assembled and annotated the reference genome for Su. brevipes and resequenced the whole genomes of 28 individuals from coastal and montane sites in California. We detected two clearly delineated coast and mountain populations with very low divergence. Genomic divergence was restricted to few regions, including a region of extreme divergence containing a gene encoding for a membrane Na+/H+ exchanger known for enhancing salt tolerance in plants and yeast. Our results are consistent with a very recent split between the montane and coastal Su. brevipes populations, with few small genomic regions under positive selection and a pattern of dispersal and/or establishment limitation. Furthermore, we identify a putatively adaptive gene that motivates further functional analyses to link genotypes and phenotypes and shed light on the genetic basis of adaptive traits.
See also the Perspective by Skrede and Brandström Durling
Url:
DOI: 10.1111/mec.13132
Affiliations:
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Peay</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biology, Stanford University, CA 94305, Stanford</wicri:regionArea><wicri:noRegion>Stanford</wicri:noRegion></affiliation></author><author><name sortKey="Taylor, John W" sort="Taylor, John W" uniqKey="Taylor J" first="John W." last="Taylor">John W. Taylor</name><affiliation wicri:level="3"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant and Microbial Biology, University of California, CA 94720, Berkeley</wicri:regionArea><placeName><settlement type="city">Berkeley (Californie)</settlement><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Bruns, Thomas D" sort="Bruns, Thomas D" uniqKey="Bruns T" first="Thomas D." last="Bruns">Thomas D. Bruns</name><affiliation wicri:level="3"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant and Microbial Biology, University of California, CA 94720, Berkeley</wicri:regionArea><placeName><settlement type="city">Berkeley (Californie)</settlement><region type="state">Californie</region></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Molecular Ecology</title><title level="j" type="alt">MOLECULAR ECOLOGY</title><idno type="ISSN">0962-1083</idno><idno type="eISSN">1365-294X</idno><imprint><biblScope unit="vol">24</biblScope><biblScope unit="issue">11</biblScope><biblScope unit="page" from="2747">2747</biblScope><biblScope unit="page" to="2758">2758</biblScope><biblScope unit="page-count">12</biblScope><date type="published" when="2015-06">2015-06</date></imprint><idno type="ISSN">0962-1083</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0962-1083</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract">Fungi are an omnipresent and highly diverse group of organisms, making up a significant part of eukaryotic diversity. Little is currently known about the drivers of fungal population differentiation and subsequent divergence of species, particularly in symbiotic, mycorrhizal fungi. Here, we investigate the population structure and environmental adaptation in Suillus brevipes (Peck) Kuntze, a wind‐dispersed soil fungus that is symbiotic with pine trees. We assembled and annotated the reference genome for Su. brevipes and resequenced the whole genomes of 28 individuals from coastal and montane sites in California. We detected two clearly delineated coast and mountain populations with very low divergence. Genomic divergence was restricted to few regions, including a region of extreme divergence containing a gene encoding for a membrane Na+/H+ exchanger known for enhancing salt tolerance in plants and yeast. Our results are consistent with a very recent split between the montane and coastal Su. brevipes populations, with few small genomic regions under positive selection and a pattern of dispersal and/or establishment limitation. Furthermore, we identify a putatively adaptive gene that motivates further functional analyses to link genotypes and phenotypes and shed light on the genetic basis of adaptive traits.</div><div type="abstract">See also the Perspective by Skrede and Brandström Durling</div></front></TEI><affiliations><list><country><li>France</li><li>États-Unis</li></country><region><li>Californie</li><li>Île-de-France</li></region><settlement><li>Berkeley (Californie)</li><li>Orsay</li></settlement></list><tree><country name="États-Unis"><region name="Californie"><name sortKey="Branco, Sara" sort="Branco, Sara" uniqKey="Branco S" first="Sara" last="Branco">Sara Branco</name></region><name sortKey="Bruns, Thomas D" sort="Bruns, Thomas D" uniqKey="Bruns T" first="Thomas D." last="Bruns">Thomas D. Bruns</name><name sortKey="Ellison, Christopher E" sort="Ellison, Christopher E" uniqKey="Ellison C" first="Christopher E." last="Ellison">Christopher E. Ellison</name><name sortKey="Grigoriev, Igor V" sort="Grigoriev, Igor V" uniqKey="Grigoriev I" first="Igor V." last="Grigoriev">Igor V. Grigoriev</name><name sortKey="Kuo, Alan" sort="Kuo, Alan" uniqKey="Kuo A" first="Alan" last="Kuo">Alan Kuo</name><name sortKey="Labutti, Kurt" sort="Labutti, Kurt" uniqKey="Labutti K" first="Kurt" last="Labutti">Kurt Labutti</name><name sortKey="Liao, Hui Ing" sort="Liao, Hui Ing" uniqKey="Liao H" first="Hui-Ling" last="Liao">Hui-Ling Liao</name><name sortKey="Lipzen, Anna" sort="Lipzen, Anna" uniqKey="Lipzen A" first="Anna" last="Lipzen">Anna Lipzen</name><name sortKey="Peay, Kabir G" sort="Peay, Kabir G" uniqKey="Peay K" first="Kabir G." last="Peay">Kabir G. Peay</name><name sortKey="Taylor, John W" sort="Taylor, John W" uniqKey="Taylor J" first="John W." last="Taylor">John W. Taylor</name><name sortKey="Vilgalys, Rytas" sort="Vilgalys, Rytas" uniqKey="Vilgalys R" first="Rytas" last="Vilgalys">Rytas Vilgalys</name></country><country name="France"><region name="Île-de-France"><name sortKey="Gladieux, Pierre" sort="Gladieux, Pierre" uniqKey="Gladieux P" first="Pierre" last="Gladieux">Pierre Gladieux</name></region><name sortKey="Gladieux, Pierre" sort="Gladieux, Pierre" uniqKey="Gladieux P" first="Pierre" last="Gladieux">Pierre Gladieux</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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