Unknown

Dataset Information

0

Effects of recombination on hitchhiking diversity in the Brassica self-incompatibility locus complex.


ABSTRACT: In self-incompatibility, a number of S haplotypes are maintained by frequency-dependent selection, which results in trans-specific S haplotypes. The region of several kilobases (approximately 40-60 kb) from SP6 to SP2, including self-incompatibility-related genes and some adjacent genes in Brassica rapa, has high nucleotide diversity due to the hitchhiking effect, and therefore we call this region the "S-locus complex." Recombination in the S-locus complex is considered to be suppressed. We sequenced regions of >50 kb of the S-locus complex of three S haplotypes in B. rapa and found higher nucleotide diversity in intergenic regions than in coding regions. Two highly similar regions of >10 kb were found between BrS-8 and BrS-46. Phylogenetic analysis using trans-specific S haplotypes (called interspecific pairs) of B. rapa and B. oleracea suggested that recombination reduced the nucleotide diversity in these two regions and that the genes not involved in self-incompatibility in the S-locus complex and the kinase domain, but not the S domain, of SRK have also experienced recombination. Recombination may reduce hitchhiking diversity in the S-locus complex, whereas the region from the S domain to SP11 would disfavor recombination.

SUBMITTER: Takuno S 

PROVIDER: S-EPMC2034657 | biostudies-literature | 2007 Oct

REPOSITORIES: biostudies-literature

altmetric image

Publications

Effects of recombination on hitchhiking diversity in the Brassica self-incompatibility locus complex.

Takuno Shohei S   Fujimoto Ryo R   Sugimura Tetsu T   Sato Keiichi K   Okamoto Shunsuke S   Zhang Shao-Ling SL   Nishio Takeshi T  

Genetics 20070824 2


In self-incompatibility, a number of S haplotypes are maintained by frequency-dependent selection, which results in trans-specific S haplotypes. The region of several kilobases (approximately 40-60 kb) from SP6 to SP2, including self-incompatibility-related genes and some adjacent genes in Brassica rapa, has high nucleotide diversity due to the hitchhiking effect, and therefore we call this region the "S-locus complex." Recombination in the S-locus complex is considered to be suppressed. We sequ  ...[more]

Similar Datasets

| S-EPMC1460586 | biostudies-other
| S-EPMC7530648 | biostudies-literature
| S-EPMC4596330 | biostudies-other
| S-EPMC26537 | biostudies-literature
| S-EPMC5143417 | biostudies-literature
| S-EPMC6651594 | biostudies-literature
| S-EPMC52601 | biostudies-other
| S-EPMC3207705 | biostudies-literature
| S-EPMC327116 | biostudies-literature
| S-EPMC1460250 | biostudies-other