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          Institute: MPI für Entwicklungsbiologie     Collection: Abteilung 6 - Molecular Biology (D. Weigel)     Display Documents



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ID: 591475.0, MPI für Entwicklungsbiologie / Abteilung 6 - Molecular Biology (D. Weigel)
Evolution of the S-locus region in Arabidopsis relatives
Authors:Guo, Y. L.; Zhao, X.; Lanz, C.; Weigel, D.
Date of Publication (YYYY-MM-DD):2011-10
Title of Journal:Plant Physiol.
Volume:157
Issue / Number:2
Start Page:937
End Page:946
Review Status:not specified
Audience:Not Specified
Abstract / Description:The S locus, a single polymorphic locus, is responsible for self-incompatibility (SI) in the Brassicaceae family and many related plant families. Despite its importance, our knowledge of S-locus evolution is largely restricted to the causal genes encoding the S-locus receptor kinase (SRK) receptor and S-locus cysteine-rich protein (SCR) ligand of the SI system. Here, we present high-quality sequences of the genomic region of six S-locus haplotypes: Arabidopsis (Arabidopsis thaliana; one haplotype), Arabidopsis lyrata (four haplotypes), and Capsella rubella (one haplotype). We compared these with reference S-locus haplotypes of the self-compatible Arabidopsis and its SI congener A. lyrata. We subsequently reconstructed the likely genomic organization of the S locus in the most recent common ancestor of Arabidopsis and Capsella. As previously reported, the two SI-determining genes, SCR and SRK, showed a pattern of coevolution. In addition, consistent with previous studies, we found that duplication, gene conversion, and positive selection have been important factors in the evolution of these two genes and appear to contribute to the generation of new recognition specificities. Intriguingly, the inactive pseudo-S-locus haplotype in the self-compatible species C. rubella is likely to be an old S-locus haplotype that only very recently became fixed when C. rubella split off from its SI ancestor, Capsella grandiflora.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Entwicklungsbiologie/Abteilung 6 - Molekulare Biologie (Detlef Weigel)
External Affiliations:%G eng
Identifiers:ISSN:1532-2548 (Electronic) 0032-0889 (Linking) %R pp.1... [ID No:1]
URL:http://www.ncbi.nlm.nih.gov/pubmed/21810962 [ID No:2]
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