Intraspecific variation in reproductive barriers between two closely related Arabidopsis sister species.

ABSTRACT: Reproductive isolation (RI) is a critical component of speciation and varies strongly in timing and strength among different sister taxa, depending on, for example the geography of speciation and divergence time. However, these factors may also produce variation in timing and strength among populations within species. Here we tested for variation in the expression of RI among replicate population pairs between the sister taxa Arabidopsis lyrata subsp. lyrata and A. arenicola. While the former is predominantly outcrossing, the latter is predominantly selfing. We focused on intrinsic prezygotic and postzygotic RI as both species occur largely in allopatry. We assessed RI by performing within-population crosses and interspecific between-population crosses, and by raising offspring. RI was gen

SUBMITTER: Perrier A 

PROVIDER: S-EPMC10100320 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature