Parapatric speciation in three islands: dynamics of geographical configuration of allele sharing.

ABSTRACT: We studied the time to speciation by geographical isolation for a species living on three islands connected by rare migration. We assumed that incompatibility was controlled by a number of quantitative loci and that individuals differing in loci by more than a threshold did not mix genetically with each other. For each locus, we defined the geographical configuration (GC), which specifies islands with common alleles, and traced the stochastic transitions between different GCs. From these results, we calculated the changes in genetic distances. As a single migration event provides an opportunity for transitions in multiple loci, the GCs of different loci are correlated, which can be evaluated by constructing the stochastic differential equations of the number of loci with different GCs. Our

SUBMITTER: Yamaguchi R 

PROVIDER: S-EPMC5367319 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature