PJB-2018-1652
Mapping the OsDMS-2 dominant male sterile rice mutant
Yanling Liang, Hengqi Min, Xiaohua Xian, Yun Chen, Min Shi, Shuanglin Du, Kun Yang, Yuanxin Huang, Jun Lv and Yi Zhang
Abstract
Dominant male sterility is one of the two most important types of male sterility. However, its underlying mechanism has not yet been characterized. In this study, the anthers of OsDMS-2 dominant male sterile mutant were shorter and whiter than wild-type anthers. Moreover, pollen abundance was lower in mutant than wild-type anthers, with most mutant pollen grains being small and malformed. Inheritance analysis showed that male sterility was controlled by one dominant gene. However, gene mapping suggested that two loci, OsDMS-2A (on chromosome 2) and OsDMS-2B (on chromosome 8), might be responsible for the dominant sterility of the OsDMS-2 mutant. The flanking markers of OsDMS-2A are C2D11 and C2D12, with genetic distances of 0.66 and 0.33 cM, respectively. The C8D3 and C8D7 markers flanking OsDMS-2B have genetic distances of 1.32 and 2.32 cM, respectively. Molecular mapping disagreeing with classical genetic analysis indicates OsDMS-2 is a novel and valuable mutant for understanding male sterility genetic mechanism.
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