Fine mapping and candidate gene analysis of the novel thermo-sensitive genic male sterility tms9-1 gene in rice

文献类型： 外文期刊

第一作者： Qi, Yongbin

作者： Qi, Yongbin;Mao, Bizeng;He, Zuhua;Qi, Yongbin;Liu, Qinglong;Jin, Qingsheng;Zhang, Lin;Yan, Dawei;He, Zuhua;Zhang, Lin;Yan, Dawei;He, Zuhua

作者机构：

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2014 年 127 卷 5 期

页码：

收录情况： SCI

摘要： Key message Fine mapping of the novel thermo-sensitive genic male sterility locus tms9-1 in the traditional TGMS line HengnongS-1 revealed that the MALE STERILITY1 homolog OsMS1 is the candidate gene. Abstract Photoperiod-thermo-sensitive genic male sterility (P/TGMS) has been widely used in the two-line hybrid rice breeding system. HengnongS-1 is one of the oldest TGMS lines and is often used in indica two-line breeding programs in China. In this study, our genetic analysis showed that the TGMS gene in HengnongS-1 was controlled by a single recessive gene that was non-allelic with the other TGMS loci identified, including C815S, Zhu1S and Y58S. Using SSR markers and bulked segregant analysis, we located the TGMS locus on chromosome 9 and named the gene tms9-1. Fine mapping further narrowed the tms9-1 loci to a 162 kb interval between two dCAPS markers. Sequence analysis revealed that a T to C substitution results in an amino acid change in the tms9-1 candidate gene (Os09g27620) in HengnongS-1 as compared to Minghui63. Sequencing of other rice accessions, including six P/TGMS lines, seven indica varieties and nine japonica varieties, showed that this SNP was exclusive to HengnongS-1. With multiple sequence alignment and expression pattern analyses, the rice MALE STERILITY1 homolog OsMS1 gene was identified as the candidate gene for tms9-1. Therefore, our study identified a novel TGMS locus and will facilitate the functional identification of the tms9-1 gene. Moreover, the markers linked to the tms9-1 gene will provide useful tools for the development of new TGMS lines by marker-assisted selection in two-line hybrid rice breeding programs.

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