Repeatable Selection on Large Ancestry Blocks in an Avian Hybrid Zone.

ABSTRACT: Hybrid zones create natural tests of genetic incompatibilities by combining loci from 2 species in the same genetic background in the wild, making them useful for identifying loci involved in both intrinsic and ecological (extrinsic) isolation. Two Swainson's thrush subspecies form a hybrid zone in western North America. These coastal and inland subspecies exhibit dramatic differences in migration routes; their hybrids exhibit poor migratory survival, suggesting that ecological incompatibilities maintain this zone. We used a panel of ancestry informative markers to identify repeated patterns of selection and introgression across 4 hybrid populations that span the entire length of the Swainson's thrush hybrid zone. Two repeatable patterns consistent with selection against incompatibilities-

SUBMITTER: Blain SA 

PROVIDER: S-EPMC11886783 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature