An Empirical Analysis Rejects the Hybrid Speciation Hypothesis of a Crucial Kiwifruit Species, Despite Genomic Evidence of Frequent Interspecific Gene Flow in the Genus.

ABSTRACT: Hybrid speciation is an important way to generate species diversity. In general, however, interspecific hybridization is easily confused with the formation of hybrid species. Using the genomic resequencing data of the kiwifruit genus (Actinidia), at least ten species were documented recently as homoploid hybrid species, and thus a two-layer mode of species diversification has been proposed. As a crucial piece of evidence, Actinidia fulvicoma was identified as a hybrid derivative of Actinidia eriantha × Actinidia cylindrica, representing a rare case of hybrid species in kiwifruit that won the competition of ecological niches with one of its putative parental species, A. cylindrica. However, the hypothesized hybrid origin of A. fulvicoma is inconsist

SUBMITTER: Yang J 

PROVIDER: S-EPMC7011101 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature