Selective sweeps in the homoploid hybrid species Helianthus deserticola: evolution in concert across populations and across origins.

ABSTRACT: The evolution of different populations within a species in response to selective pressures can potentially happen in three different ways. It can occur in parallel, where similar changes occur independently in each population in response to selection; in concert, where the spread of an adaptive mutation across a species' range results in a single allele fixing in each population; or populations can diverge in response to local selective pressures. We explored these possibilities in populations of the homoploid hybrid species Helianthus deserticola relative to its parental species Helianthus annuus and Helianthus petiolaris using an analysis of variation in 96 expressed sequence tag-based microsatellites. A total of nine loci showed evidence consistent with recent selection at either the sp

SUBMITTER: Gross BL 

PROVIDER: S-EPMC2443816 | biostudies-literature | 2007 Dec

REPOSITORIES: biostudies-literature