Divergence and isolation of cryptic sympatric taxa within the annual legume Amphicarpaea bracteata.

ABSTRACT: The amphicarpic annual legume Amphicarpaea bracteata is unusual in producing aerial and subterranean cleistogamous flowers that always self-fertilize and, less commonly, aerial chasmogamous flowers that outcross. Although both morphologic and genetic variants are known in this highly selfing species, debate continues over whether this variation is continuous, reflecting the segregation of standing genetic variation, or discontinuous, reflecting distinct taxa that rarely intercross. We characterized SNP variation in 128 individuals in southern Wisconsin to assess within- and among-population variation at 3928 SNPs. We also assessed genotype and leaf morphology in an additional 76 individuals to connect phenotypic variation with genetic variation. Genetic variation maps onto three strongly d

SUBMITTER: Kartzinel RY 

PROVIDER: S-EPMC4833626 | biostudies-literature | 2016 May

REPOSITORIES: biostudies-literature