Demographic history shaped geographical patterns of deleterious mutation load in a broadly distributed Pacific Salmon.

ABSTRACT: A thorough reconstruction of historical processes is essential for a comprehensive understanding of the mechanisms shaping patterns of genetic diversity. Indeed, past and current conditions influencing effective population size have important evolutionary implications for the efficacy of selection, increased accumulation of deleterious mutations, and loss of adaptive potential. Here, we gather extensive genome-wide data that represent the extant diversity of the Coho salmon (Oncorhynchus kisutch) to address two objectives. We demonstrate that a single glacial refugium is the source of most of the present-day genetic diversity, with detectable inputs from a putative secondary micro-refugium. We found statistical support for a scenario whereby ancestral populations located south of the ice s

SUBMITTER: Rougemont Q 

PROVIDER: S-EPMC7478589 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature