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Characterization and fine mapping of a female fertility associated gene Ff1(t) in rice

文献类型： 外文期刊

作者： Zhao, Lei 1 ; Yan, Song 2 ; Huang, Renliang 2 ; Zhu, Shan 2 ; Xiong, Hongliang 2 ; Peng, Zhiqin 3 ; Zhou, Qingyou 1 ; Hua 1 ;

作者机构： 1.Jiangxi Agr Univ, Key Lab Agr Responding Climate Change, Nanchang 330045, Peoples R China

2.Jiangxi Acad Agr Sci, Rice Res Inst, Rice Natl Engn Lab Nanchang, Jiangxi Prov Key Lab Physiol & Genet Rice, Nanchang 330200, Peoples R China

3.Jiangxi Agr Univ, Key Lab Crop Physiol Ecol & Genet Breeding, Minist Educ, Nanchang 330045, Peoples R China

关键词： rice;female fertility weakening;ovary development;molecular mapping

期刊名称：JOURNAL OF GENETICS （ 影响因子：1.166； 五年影响因子：1.212 ）

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收录情况： SCI

摘要： Female-sterile line can be used as a pollinator which has a great potential for hybrid seeds production. However, reports on female fertility are fewer than male fertility. Here, we characterized a recessive female fertility weakening mutant ff1(t) from rice. The spikelet fertility was seriously affected in the mutant. Reciprocal crosses and pollen vitality assay suggest that the decreased fertility was caused by the defective female gametophytes. Further investigation indicated that the mutant ovary development was inhibited before fertilization and failed swelling after flowering. Genetic analysis and fine mapping showed that the mutant was controlled by a single recessive gene, residing on a 16.8 kb region on the long arm of chromosome 1. The gene annotation indicated that there was only one putative gene encoding lysine decarboxylase-like protein in this region, which was allelic to LOG. Further, the sequence analysis was carried out and a substitution at the splice site of intron 2 / exon 3 was revealed in ff1(t) mutant, resulting in the change of reading frame. The finding of novel allele of LOG locus will facilitate the understanding of the mechanisms of female gametophyte development.

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