Long-distance dispersal suppresses introgression of local alleles during range expansions.

ABSTRACT: During range expansions, even low levels of interbreeding can lead to massive introgression of local alleles into an invader's genome. Nonetheless, this pattern is not always observed in human populations. For instance, European Americans in North America are barely introgressed by Amerindian genes in spite of known contact and admixture. With coalescent spatially explicit simulations, we examined the impact of long-distance dispersal (LDD) events on introgression of local alleles into the invading population using a set of different demographic scenarios applicable to a diverse range of natural populations and species. More specifically, we consider two distinct LDD models: one where LDD events originate in the range core and targets only the expansion front and a second one where LDD eve

SUBMITTER: Amorim CE 

PROVIDER: S-EPMC5234476 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature