Parapatric speciation in three islands: dynamics of geographical configuration of allele sharing
| Autor: | Yoh Iwasa, Ryo Yamaguchi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Waiting time Geographical isolation Stochastic modelling recurrent migration Locus (genetics) Parapatric speciation Biology 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Genetic drift neutral loci Allele lcsh:Science stochastic model Genetics Multidisciplinary 030104 developmental biology lcsh:Q genetic drift Allele sharing speciation rate Mathematics Research Article |
| Zdroj: | Royal Society Open Science Royal Society Open Science, Vol 4, Iss 2 (2017) |
| ISSN: | 2054-5703 |
| Popis: | 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 model showed that the low number of incompatibility loci facilitates parapatric speciation and that migrants arriving as a group shorten the waiting time to speciation compared with the same number of migrants arriving individually. We also discuss how speciation rate changes with geographical structure. |
| Databáze: | OpenAIRE |
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