Admixture between Ancient Lineages, Selection, and the Formation of Sympatric Stickleback Species-Pairs.

ABSTRACT: Ecological speciation has become a popular model for the development and maintenance of reproductive isolation in closely related sympatric pairs of species or ecotypes. An implicit assumption has been that such pairs originate (possibly with gene flow) from a recent, genetically homogeneous ancestor. However, recent genomic data have revealed that currently sympatric taxa are often a result of secondary contact between ancestrally allopatric lineages. This has sparked an interest in the importance of initial hybridization upon secondary contact, with genomic reanalysis of classic examples of ecological speciation often implicating admixture in speciation. We describe a novel occurrence of unusually well-developed reproductive isolation in a model system for ecological speciation: the thre

SUBMITTER: Dean LL 

PROVIDER: S-EPMC6805233 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature