Evolution of putative barrier loci at an intermediate stage of speciation with gene flow in campions (Silene).

ABSTRACT: Understanding the origin of new species is a central goal in evolutionary biology. Diverging lineages often evolve highly heterogeneous patterns of genetic differentiation; however, the underlying mechanisms are not well understood. We investigated evolutionary processes governing genetic differentiation between the hybridizing campions Silene dioica (L.) Clairv. and S. latifolia Poiret. Demographic modelling indicated that the two species diverged with gene flow. The best-supported scenario with heterogeneity in both migration rate and effective population size suggested that a small proportion of the loci evolved without gene flow. Differentiation (F _ST ) and sequence divergence (d _XY ) were correlated and both tended to peak in the middle of most linkage groups, co

SUBMITTER: Liu X 

PROVIDER: S-EPMC7540528 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature