Rapid sexual and genomic isolation in sympatric Drosophila without reproductive character displacement.

ABSTRACT: The rapid evolution of sexual isolation in sympatry has long been associated with reinforcement (i.e., selection to avoid maladaptive hybridization). However, there are many species pairs in sympatry that have evolved rapid sexual isolation without known costs to hybridization. A major unresolved question is what evolutionary processes are involved in driving rapid speciation in such cases. Here, we focus on one such system; the Drosophila athabasca species complex, which is composed of three partially sympatric and interfertile semispecies: WN, EA, and EB. To study speciation in this species complex, we assayed sexual and genomic isolation within and between these semispecies in both sympatric and allopatric populations. First, we found no evidence of reproductive character displac

SUBMITTER: Yukilevich R 

PROVIDER: S-EPMC5838044 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature