Repeated adaptive introgression at a gene under multiallelic balancing selection.

ABSTRACT: Recently diverged species typically have incomplete reproductive barriers, allowing introgression of genetic material from one species into the genomic background of the other. The role of natural selection in preventing or promoting introgression remains contentious. Because of genomic co-adaptation, some chromosomal fragments are expected to be selected against in the new background and resist introgression. In contrast, natural selection should favor introgression for alleles at genes evolving under multi-allelic balancing selection, such as the MHC in vertebrates, disease resistance, or self-incompatibility genes in plants. Here, we test the prediction that negative, frequency-dependent selection on alleles at the multi-allelic gene controlling pistil self-incompatibility specificity i

SUBMITTER: Castric V 

PROVIDER: S-EPMC2517234 | biostudies-literature | 2008 Aug

REPOSITORIES: biostudies-literature