Genetic analysis and fine mapping of tms9, a novel thermosensitive genic male‐sterile gene in rice (Oryza sativa L.). Issue 2 (26th February 2013)

• Record Type: Journal Article
• Authors: Sheng, Zhonghua; Wei, Xiangjin; Shao, Gaoneng; Chen, Mingliang; Song, Jian; Tang, Shaoqing; Luo, Ju; Hu, Yichao; Hu, Peisong; Chen, Liyun; Ahn, S. N.
• Is Part Of: Plant breeding. Volume 132:Issue 2(2013)
• Page Start: 159
• Page End: 164
• Publication Date: 2013-02-26
• Subjects: Plant breeding -- Periodicals; 631.52
• DOI: 10.1111/pbr.12024
• Languages: English
• ISSNs: 0179-9541

Abstract

<abstract abstract-type="main" id="pbr12024-abs-0001"> <title>Abstract</title> <p>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 F<sub>2</sub> populations was used to show that its male sterility is inherited as a single recessive gene and that responsible gene (termed <italic>tms9</italic>) lies on the short arm of chromosome 2. A high‐resolution linkage analysis which was based on the Zhu1S/R173 F<sub>2</sub> population found that the thermosensitive genic male‐sterile gene <italic>tms9</italic> of Zhu1S was fine mapped between insertion–deletion (Indel) markers Indel 37 and Indel 57, and the genetic distance from the <italic>tms9</italic> to the two markers was 0.12 and 0.31 cM, respectively. The physical distance between the two markers was about 107.2 kb. 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 <italic>tms9</italic> and molecular marker–assisted selection.</p> </abstract>