Dominance relationships between self-incompatibility alleles controlled by DNA methylation
Dominance relationships between self-incompatibility alleles controlled by DNA methylation
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DOI：
10.1038/ng1734
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发表时间：
2006-03-01
期刊：
影响因子：
30.8
通讯作者：
Takayama, S
中科院分区：
文献类型：
--
作者：
Shiba, H;Kakizaki, T;Takayama, S
在十字花科植物中，花粉S-决定基因SP11在花药绒毡层中以孢子体方式表达，花粉自交不亲和表型由其携带的两个S-单倍型之间的显性关系决定。我们在这里报告，5'启动子序列的隐性SP11等位基因特异性甲基化的绒毡层开始之前，SP11的转录。这些结果表明，组织特异性的单等位基因从头DNA甲基化参与决定优势的相互作用，确定十字花科自交不亲和表型。
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.