关键词:三系杂交粳稻; 杂种花粉不育; 遗传分析; 基因定位 Mapping of Pollen Sterility Gene in Hybrid of Yujing 6 B Line and Restorer TR2604 ZHANG Hong-Gen**, SUN Yi-Biao**, FENG Zhi-Qiang, QIAN Kai, PEI Yan, LI Chuang, TANG Shu-Zhu*, LIANG Guo-Hua, GU Ming-Hong Key Laboratory of Crop Genetics and Physiology of Jiangsu Province / Key Laboratory of Plant Functional Genomics of Ministry of Education / Yangzhou University, Yangzhou 225009, China Fund: AbstractUnderstanding genetic basis of spikelet fertility of BT-type hybrid rice may facilitate three-linejaponica hybrid breeding. According to pollen and spikelet fertility of the hybrids derived from a restorer line, TR2604, and the A and B lines of Yujing 6 or 9201, we confirmed that the sterility of Yujing 6A(B)/TR2604 F1plants was induced by the incompatibility between the parents. Genetic analysis suggested that the hybrid pollen sterility character was controlled by a single nuclear gene namedS38(t). A total of 352 plants from Yujing 6A line//TR2604/TR2604 and Yujing 6B/TR2604//Yujing 6B segregation populations were used for gene mapping, andS38(t)was mapped between RM18 and RM234 on chromosome 7 with genetic distances of 0.43 cM and 0.14 cM, respectively. The physical distance between RM18 and RM234 was about 118 kb. These results are useful for the map-based cloning ofS38(t)gene.
Keyword:Three-linejaponica hybrid; Hybrid pollen sterility; Genetic analysis; Gene mapping Show Figures Show Figures
图1 组合9201B/TR2604(A)和豫粳6号B/TR2604(B)的花粉箭头示圆败花粉。Fig. 1 Pollen phenotype of 9201B/TR2604(A) and Yujing 6B/TR2604(B)The arrows show the spherical abortion type of pollen.
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