The genomic and ecological context of hybridization affects the probability that symmetrical incompatibilities drive hybrid speciation.

ABSTRACT: Despite examples of homoploid hybrid species, theoretical work describing when, where, and how we expect homoploid hybrid speciation to occur remains relatively rare. Here, I explore the probability of homoploid hybrid speciation due to "symmetrical incompatibilities" under different selective and genetic scenarios. Through simulation, I test how genetic architecture and selection acting on traits that do not themselves generate incompatibilities interact to affect the probability that hybrids evolve symmetrical incompatibilities with their parent species. Unsurprisingly, selection against admixture at "adaptive" loci that are linked to loci that generate incompatibilities tends to reduce the probability of evolving symmetrical incompatibilities. By contrast, selection that favors admixed

SUBMITTER: Comeault AA 

PROVIDER: S-EPMC5838063 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature