Inbreeding depression is high in a self-incompatible perennial herb population but absent in a self-compatible population showing mixed mating.

ABSTRACT: High inbreeding depression is thought to be one of the major factors preventing evolutionary transitions in hermaphroditic plants from self-incompatibility (SI) and outcrossing toward self-compatibility (SC) and selfing. However, when selfing does evolve, inbreeding depression can be quickly purged, allowing the evolution of complete self-fertilization. In contrast, populations that show intermediate selfing rates (a mixed-mating system) typically show levels of inbreeding depression similar to those in outcrossing species, suggesting that selection against inbreeding might be responsible for preventing the transition toward complete self-fertilization. By implication, crosses among populations should reveal patterns of heterosis for mixed-mating populations that are similar to those expec

SUBMITTER: Voillemot M 

PROVIDER: S-EPMC5648656 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature