Selection, Linkage, and Population Structure Interact To Shape Genetic Variation Among Threespine Stickleback Genomes.

ABSTRACT: The outcome of selection on genetic variation depends on the geographic organization of individuals and populations as well as the organization of loci within the genome. Spatially variable selection between marine and freshwater habitats has had a significant and heterogeneous impact on patterns of genetic variation across the genome of threespine stickleback fish. When marine stickleback invade freshwater habitats, more than a quarter of the genome can respond to divergent selection, even in as little as 50 years. This process largely uses standing genetic variation that can be found ubiquitously at low frequency in marine populations, can be millions of years old, and is likely maintained by significant bidirectional gene flow. Here, we combine population genomic data of marine and fres

SUBMITTER: Nelson TC 

PROVIDER: S-EPMC6707445 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature