Recent loss of self-incompatibility by degradation of the male component in allotetraploid Arabidopsis kamchatica.

ABSTRACT: The evolutionary transition from outcrossing to self-fertilization (selfing) through the loss of self-incompatibility (SI) is one of the most prevalent events in flowering plants, and its genetic basis has been a major focus in evolutionary biology. In the Brassicaceae, the SI system consists of male and female specificity genes at the S-locus and of genes involved in the female downstream signaling pathway. During recent decades, much attention has been paid in particular to clarifying the genes responsible for the loss of SI. Here, we investigated the pattern of polymorphism and functionality of the female specificity gene, the S-locus receptor kinase (SRK), in allotetraploid Arabidopsis kamchatica. While its parental species, A. lyrata and A. halleri, are reported to be diploid and main

SUBMITTER: Tsuchimatsu T 

PROVIDER: S-EPMC3405996 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature