Mating system variation in hybrid zones: facilitation, barriers and asymmetries to gene flow.

ABSTRACT: Plant mating systems play a key role in structuring genetic variation both within and between species. In hybrid zones, the outcomes and dynamics of hybridization are usually interpreted as the balance between gene flow and selection against hybrids. Yet, mating systems can introduce selective forces that alter these expectations; with diverse outcomes for the level and direction of gene flow depending on variation in outcrossing and whether the mating systems of the species pair are the same or divergent. We present a survey of hybridization in 133 species pairs from 41 plant families and examine how patterns of hybridization vary with mating system. We examine if hybrid zone mode, level of gene flow, asymmetries in gene flow and the frequency of reproductive isolating barriers vary in re

SUBMITTER: Pickup M 

PROVIDER: S-EPMC6856794 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature