Assessing biological factors affecting postspeciation introgression.

ABSTRACT: An increasing number of phylogenomic studies have documented a clear "footprint" of postspeciation introgression among closely related species. Nonetheless, systematic genome-wide studies of factors that determine the likelihood of introgression remain rare. Here, we propose an a priori hypothesis-testing framework that uses introgression statistics-including a new metric of estimated introgression, D _p-to evaluate general patterns of introgression prevalence and direction across multiple closely related species. We demonstrate this approach using whole genome sequences from 32 lineages in 11 wild tomato species to assess the effect of three factors on introgression-genetic relatedness, geographical proximity, and mating system differences-based on multiple trios within t

SUBMITTER: Hamlin JAP 

PROVIDER: S-EPMC7156103 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature