On the impermanence of species: The collapse of genetic incompatibilities in hybridizing populations.

ABSTRACT: Species pairs often become genetically incompatible during divergence, which is an important source of reproductive isolation. An idealized picture is often painted where incompatibility alleles accumulate and fix between diverging species. However, recent studies have shown both that incompatibilities can collapse with ongoing hybridization, and that incompatibility loci can be polymorphic within species. This paper suggests some general rules for the behavior of incompatibilities under hybridization. In particular, we argue that redundancy of genetic pathways can strongly affect the dynamics of intrinsic incompatibilities. Since fitness in genetically redundant systems is unaffected by introducing a few foreign alleles, higher redundancy decreases the stability of incompatibilities durin

SUBMITTER: Xiong T 

PROVIDER: S-EPMC9827863 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature