Genetic analysis and fine mapping of tms9, a novel thermosensitive genic male-sterile gene in rice (Oryza sativa L.)
文献类型: 外文期刊
第一作者: Sheng, Zhonghua
作者: Sheng, Zhonghua;Wei, Xiangjin;Shao, Gaoneng;Chen, Mingliang;Song, Jian;Tang, Shaoqing;Luo, Ju;Hu, Peisong;Sheng, Zhonghua;Hu, Yichao;Chen, Liyun
作者机构:
关键词: thermosensitive genic male-sterile gene;tms9;fine mapping;rice
期刊名称:PLANT BREEDING ( 影响因子:1.832; 五年影响因子:1.956 )
ISSN: 0179-9541
年卷期: 2013 年 132 卷 2 期
页码:
收录情况: SCI
摘要: Two-line hybrid rice as a novel hybrid breeding method has huge potential for yield increasing and utilization of intersubspecific heterosis, and it is of major significance for the food security of rice-consuming populations. Zhu1S is a thermosensitive genic male-sterile line of rice with low critical temperature and excellent combining ability, which has been widely exploited as a female parent in Chinese two-line hybrid rice breeding. Here, genetic mapping in F2 populations was used to show that its male sterility is inherited as a single recessive gene and that responsible gene (termed tms9) lies on the short arm of chromosome 2. A high-resolution linkage analysis which was based on the Zhu1S/R173 F2 population found that the thermosensitive genic male-sterile gene tms9 of Zhu1S was fine mapped between insertiondeletion (Indel) markers Indel 37 and Indel 57, and the genetic distance from the tms9 to the two markers was 0.12 and 0.31cM, respectively. The physical distance between the two markers was about 107.2kb. Sequence annotation databases showed that the two Indel markers (Indel 37 and Indel 57) were located on two BAC clones (B1307A11 and P0027A02). There are sixteen open reading frames (ORF) present in this region. The results of this study are of great significance for further cloning tms9 and molecular markerassisted selection.
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