Within-population sperm competition intensity does not predict asymmetry in conpopulation sperm precedence.

ABSTRACT: Postcopulatory sexual selection can generate evolutionary arms races between the sexes resulting in the rapid coevolution of reproductive phenotypes. As traits affecting fertilization success diverge between populations, postmating prezygotic (PMPZ) barriers to gene flow may evolve. Conspecific sperm precedence is a form of PMPZ isolation thought to evolve early during speciation yet has mostly been studied between species. Here, we show conpopulation sperm precedence (CpSP) between Drosophila montana populations. Using Pool-seq genomic data we estimate divergence times and ask whether PMPZ isolation evolved in the face of gene flow. We find models incorporating gene flow fit the data best indicating populations experienced considerable gene flow during divergence. We find Cp

SUBMITTER: Garlovsky MD 

PROVIDER: S-EPMC7661444 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature