Format

Send to

Choose Destination
Nat Genet. 2014 Oct;46(10):1089-96. doi: 10.1038/ng.3075. Epub 2014 Aug 24.

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

Author information

1
Department of Biology, West Virginia University, Morgantown, West Virginia, USA.
2
Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, UK.
3
The Joint Genome Institute, Walnut Creek, California, USA.
4
Plant Systems Biology Group, BioSciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA.
5
Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, Virginia, USA.
6
1] The Joint Genome Institute, Walnut Creek, California, USA. [2] Plant Systems Biology Group, BioSciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA.

Abstract

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.

PMID:
25151358
DOI:
10.1038/ng.3075
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Nature Publishing Group
Loading ...
Support Center