Dominance relationships between self-incompatibility alleles controlled by DNA methylation

Hiroshi Shiba, Tomohiro Kakizaki, Megumi Iwano, Yoshiaki Tarutani, Masao Watanabe, Akira Isogai, Seiji Takayama

Research output: Contribution to journalArticlepeer-review

88 Citations (Scopus)


In crucifers, the pollen S-determinant gene, SP11, is sporophytically expressed in the anther tapetum, and the pollen self-incompatibility phenotype is determined by the dominance relationships between the two S-haplotypes it carries. We report here that 5′ promoter sequences of recessive SP11 alleles are specifically methylated in the tapetum before the initiation of SP11 transcription. These results suggest that tissue-specific monoallelic de novo DNA methylation is involved in determining the dominance interactions that determine the cruciferous self-incompatibility phenotype.

Original languageEnglish
Pages (from-to)297-299
Number of pages3
JournalNature Genetics
Issue number3
Publication statusPublished - 2006 Mar


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