Retention of ancestral polymorphism, not recent introgression, best explains elevated levels of genetic variation in Gila Trout Oncorhynchus gilae.

Abstract excerpt

Introgressive hybridization is widespread in nature, often between native and introduced species. Closely related species also share ancestral genetic variation that mimics introgressive hybridization. In this study, we employed reduced-representation genome sequencing to test whether elevated levels of genetic variation in a protected fish species were best explained by hybridization or shared ancestry with an...

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