The Evolution and Diversification of S-locus Haplotypes in the Brassicaceae Family.
Author
Summary, in English
Self-incompatibility (SI) in the Brassicaceae plant family is controlled by the SRK and SCR genes situated at the S locus. A large number of S haplotypes have been identified, mainly in cultivated species of the Brassica and Raphanus genera, but recently also in wild Arabidopsis species. Here, we used DNA sequences from the SRK and SCR genes of the wild Brassica species B. cretica, together with publicly available sequence data from other Brassicaceae species, to investigate the evolutionary relationships between S haplotypes in the Brassicaceae family. The results reveal that wild and cultivated Brassica species have similar levels of SRK diversity indicating that domestication has had but a minor effect on S-locus diversity in Brassica. Our results also show that a common set of S haplotypes were present in the ancestor of the Brassica and Arabidopsis genera, that only a small number of haplotypes survived in the Brassica lineage after its separation from Arabidopsis, and that diversification within the two Brassica dominance classes occurred after the split between the two lineages. We also find indications that recombination may have occurred between the kinase domain of SRK and the SCR gene in Brassica.
Department/s
- Department of Biology
- Evolutionary Genetics
Publishing year
2009
Language
English
Pages
977-984
Publication/Series
Genetics
Volume
181
Issue
3
Document type
Journal article
Publisher
Genetics Society of America
Topic
- Ecology
- Genetics
Keywords
- Brassica cretica
- Arabidopsis
- SRK
- SCR
- Brassica
Status
Published
Research group
- Evolutionary Genetics
ISBN/ISSN/Other
- ISSN: 0016-6731