Population structure and local selection yield high genomic variation in Mimulus guttatus.

ABSTRACT: Across western North America, Mimulus guttatus exists as many local populations adapted to site-specific environmental challenges. Gene flow between locally adapted populations will affect genetic diversity both within demes and across the larger metapopulation. Here, we analyse 34 whole-genome sequences from the intensively studied Iron Mountain population (IM) in conjunction with sequences from 22 Mimulus individuals sampled from across western North America. Three striking features of these data address hypotheses about migration and selection in a locally adapted population. First, we find very high levels of intrapopulation polymorphism (synonymous π = 0.033). Variation outside of genes is likely even higher but difficult to estimate because excessive divergence reduces the efficiency

SUBMITTER: Puzey JR 

PROVIDER: S-EPMC5274581 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature