Characterization and genetic mapping of a novel recessive genic male sterile gene in sesame (Sesamum indicum L.)

文献类型： 外文期刊

第一作者： Zhao, Yingzhong

作者： Zhao, Yingzhong;Wu, Jiangsheng;Liu, Kede;Zhao, Yingzhong;Yang, Minmin;Wu, Kun;Liu, Hongyan

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关键词： Sesame (Sesamum indicum L.);Recessive genic male sterility;Two-type lines;Genetic mapping

期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）

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收录情况： SCI

摘要： Male sterile mutants play a very important role in the utilization of crop heterosis. A recessive genic male sterile (RGMS) two-type line 95ms-5AB was derived from a male sterile mutant of common white sesame (Sesamum indicum L.) cultivar Yuzhi 4 by treatment with gamma rays from Co-60. Male sterile 95ms-5A plants did not show any other obvious differences from the male fertile 95ms-5B plants, except for having greenish, shriveled and slim anthers with few, small and degenerative pollens. Genetic analysis indicated that the male sterility of 95ms-5A was controlled by a single RGMS gene, Sims1 (Sesamum indicum male sterility 1). An allelic test with a previously identified RGMS mutant, ms86-1, confirmed that Sims1 in 95ms-5A is different from Sims2 in ms86-1. Amplified fragment length polymorphism markers linked to SiMs1 were screened using bulked segregant analysis. A genetic linkage map of the SiMs1 gene was constructed using 237 plants derived from the sib-mating between the near-isogenic lines 95ms-5A and 95ms-5B. The SiMs1 gene was found to be located in a region of 8.0 cM, at a distance of 1.2 cM from P06MG04 and 6.8 cM from P12EA14. In this genetic region, another marker P01MC08 was identified to be co-segregated with SiMs1. The linkage map constructed in this study will be very useful for marker-assisted selection and map-based cloning of SiMs1 as well as for hybrid breeding in sesame crop.

分类号： Q94

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