Contrasted patterns of molecular evolution in dominant and recessive self-incompatibility haplotypes in Arabidopsis.

ABSTRACT: Self-incompatibility has been considered by geneticists a model system for reproductive biology and balancing selection, but our understanding of the genetic basis and evolution of this molecular lock-and-key system has remained limited by the extreme level of sequence divergence among haplotypes, resulting in a lack of appropriate genomic sequences. In this study, we report and analyze the full sequence of eleven distinct haplotypes of the self-incompatibility locus (S-locus) in two closely related Arabidopsis species, obtained from individual BAC libraries. We use this extensive dataset to highlight sharply contrasted patterns of molecular evolution of each of the two genes controlling self-incompatibility themselves, as well as of the genomic region surrounding them. We find strong coll

SUBMITTER: Goubet PM 

PROVIDER: S-EPMC3310759 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature