Fine-scale contemporary recombination variation and its fitness consequences in adaptively diverging stickleback fish.

ABSTRACT: Despite deep evolutionary conservation, recombination rates vary greatly across the genome and among individuals, sexes and populations. Yet the impact of this variation on adaptively diverging populations is not well understood. Here we characterized fine-scale recombination landscapes in an adaptively divergent pair of marine and freshwater populations of threespine stickleback from River Tyne, Scotland. Through whole-genome sequencing of large nuclear families, we identified the genomic locations of almost 50,000 crossovers and built recombination maps for marine, freshwater and hybrid individuals at a resolution of 3.8 kb. We used these maps to quantify the factors driving variation in recombination rates. We found strong heterochiasmy between sexes but also differences in recombinatio

SUBMITTER: Venu V 

PROVIDER: S-EPMC11239493 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature