Inferring the Direction of Introgression Using Genomic Sequence Data.

ABSTRACT: Genomic data are informative about the history of species divergence and interspecific gene flow, including the direction, timing, and strength of gene flow. However, gene flow in opposite directions generates similar patterns in multilocus sequence data, such as reduced sequence divergence between the hybridizing species. As a result, inference of the direction of gene flow is challenging. Here, we investigate the information about the direction of gene flow present in genomic sequence data using likelihood-based methods under the multispecies-coalescent-with-introgression model. We analyze the case of two species, and use simulation to examine cases with three or four species. We find that it is easier to infer gene flow from a small population to a large one than in the opposite directi

SUBMITTER: Thawornwattana Y 

PROVIDER: S-EPMC10439365 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature