Comparative analysis of the S-intergenic region in class-II S haplotypes of self-incompatible Brassica rapa (syn. campestris)

Tomohiro Kakizaki, Yoshinobu Takada, Tomoaki Fujioka, Go Suzuki, Yoko Satta, Hiroshi Shiba, Akira Isogai, Seiji Takayama, Masao Watanabe

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In the Brassica self-incompatibility (SI) system, a pollen determinant, SP11, is involved in dominance/recessive relationships in pollen SI phenotypes. In order to gain some insights into the genomic structure around the SP11 and the mechanisms that give dominance/recessive relationships, we characterized the genomic region containing SP11 and SRK genes in three pollen recessive class-II S haplotypes. The direction of transcription of S genes was completely conserved among class-II S haplotypes. However, the region between SP11 and SRK (S-intergenic region) was highly polymorphic without short repetitive sequences. In addition, we found a sequence similarity between the short repetitive sequence and 5′-upstream region of SP11. This sequence similarity was found to be potentially related to the expression of dominance relationships through the change of chromatin structure.

Original languageEnglish
Pages (from-to)63-67
Number of pages5
JournalGenes and Genetic Systems
Volume81
Issue number1
DOIs
Publication statusPublished - 2006 Apr 21

Keywords

  • Brassica rapa (syn. campestris)
  • Genome structure
  • S locus
  • Self-incompatibility

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics

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