Genomic Evidence for Speciation with Gene Flow in Broadcast Spawning Marine Invertebrates.

ABSTRACT: How early stages of speciation in free-spawning marine invertebrates proceed is poorly understood. The Western Pacific abalones, Haliotis discus, H. madaka, and H. gigantea, occur in sympatry with shared breeding season and are capable of producing viable F1 hybrids in spite of being ecologically differentiated. Population genomic analyses revealed that although the three species are genetically distinct, there is evidence for historical and ongoing gene flow among these species. Evidence from demographic modeling suggests that reproductive isolation among the three species started to build in allopatry and has proceeded with gene flow, possibly driven by ecological selection. We identified 27 differentiation islands between the closely related H. discus and H. madaka characterized by high

SUBMITTER: Hirase S 

PROVIDER: S-EPMC8557453 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature