Population genomics of Populus trichocarpa identifies signatures of selection and adaptive trait associations

被引：269

作者：

Evans, Luke M. ^{[1
]}

Slavov, Gancho T. ^{[2
]}

Rodgers-Melnick, Eli ^{[1
]}

Martin, Joel ^{[3
]}

Ranjan, Priya ^{[4
]}

Muchero, Wellington ^{[4
]}

Brunner, Amy M. ^{[5
]}

Schackwitz, Wendy ^{[3
]}

Gunter, Lee ^{[4
]}

Chen, Jin-Gui ^{[4
]}

Tuskan, Gerald A. ^{[3
,4
]}

DiFazio, Stephen P. ^{[1
]}

机构：

[1] W Virginia Univ, Dept Biol, Morgantown, WV 26506 USA

[2] Aberystwyth Univ, Inst Biol Environm & Rural Sci, Aberystwyth, Dyfed, Wales

[3] Joint Genome Inst, Walnut Creek, CA USA

[4] Oak Ridge Natl Lab, Plant Syst Biol Grp, BioSci Div, Oak Ridge, TN USA

[5] Virginia Tech, Dept Forest Resources & Environm Conservat, Blacksburg, VA USA

来源：

NATURE GENETICS | 2014年 / 46卷 / 10期

基金：

英国生物技术与生命科学研究理事会; 美国食品与农业研究所;

关键词：

FLOWERING-LOCUS-T; WIDE ASSOCIATION; WHOLE-GENOME; LATITUDINAL GRADIENT; BLACK COTTONWOOD; LOCAL ADAPTATION; GROWTH CESSATION; GENE; ARABIDOPSIS; MODEL;

D O I：

10.1038/ng.3075

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

Forest trees are dominant components of terrestrial ecosystems that have global ecological and economic importance. Despite distributions that span wide environmental gradients, many tree populations are locally adapted, and mechanisms underlying this adaptation are poorly understood. Here we use a combination of whole-genome selection scans and association analyses of 544 Populus trichocarpa trees to reveal genomic bases of adaptive variation across a wide latitudinal range. Three hundred ninety-seven genomic regions showed evidence of recent positive and/or divergent selection and enrichment for associations with adaptive traits that also displayed patterns consistent with natural selection. These regions also provide unexpected insights into the evolutionary dynamics of duplicated genes and their roles in adaptive trait variation.

引用

页码：1089 / 1096

页数：8

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