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

Luke Evans, Gancho Slavov, Eli Rodgers-Melnick, Joel Martin, Priya Ranjan, Wellington Muchero, Amy M Brunner, Wendy Schackwitz, Lee E. Gunter, Jin-Gui Chen, Gerald A. Tuskan, Stephen P. DiFazio

Research output: Contribution to journalArticlepeer-review

240 Citations (SciVal)
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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.
Original languageEnglish
Pages (from-to)1089-1096
Number of pages8
JournalNature Genetics
Volume46
Issue number10
Early online date24 Aug 2014
DOIs
Publication statusPublished - 26 Sept 2014

Keywords

  • Adaptation, Physiological/genetics
  • British Columbia
  • Chromosome Mapping
  • Chromosomes, Plant/genetics
  • Evolution, Molecular
  • Gene Duplication
  • Genes, Plant/genetics
  • Genetic Variation
  • Genetics, Population
  • Genome, Plant/genetics
  • Genomics/methods
  • Genotype
  • Geography
  • Linkage Disequilibrium
  • Plant Proteins/genetics
  • Polymorphism, Single Nucleotide
  • Populus/classification
  • Selection, Genetic
  • Washington

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