Independent S-locus mutations caused self-fertility in Arabidopsis thaliana.

ABSTRACT: A common yet poorly understood evolutionary transition among flowering plants is a switch from outbreeding to an inbreeding mode of mating. The model plant Arabidopsis thaliana evolved to an inbreeding state through the loss of self-incompatibility, a pollen-rejection system in which pollen recognition by the stigma is determined by tightly linked and co-evolving alleles of the S-locus receptor kinase (SRK) and its S-locus cysteine-rich ligand (SCR). Transformation of A. thaliana, with a functional AlSRKb-SCRb gene pair from its outcrossing relative A. lyrata, demonstrated that A. thaliana accessions harbor different sets of cryptic self-fertility-promoting mutations, not only in S-locus genes, but also in other loci required for self-incompatibility. However, it is still not known how man

SUBMITTER: Boggs NA 

PROVIDER: S-EPMC2650789 | biostudies-literature | 2009 Mar

REPOSITORIES: biostudies-literature