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玉米烟嘧磺隆敏感基因的遗传分析及基因定位

DOI: 10.3969/j.issn.1000-7091.2012.04.028, PP. 149-152

Keywords: 烟嘧磺隆,敏感性,遗传分析,基因定位

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Abstract:

磺酰脲类除草剂烟嘧磺隆由于低用量、低毒、广谱及使用方便等特点而被广泛使用。对包括Wny-1和yn-6在内的81个玉米自交系进行烟嘧磺隆敏感性试验,并以Wny-1和yn-6为亲本进行烟嘧磺隆敏感性遗传研究。通过Wny-1和yn-6杂交、回交得到F1、BC1群体,进而分析烟嘧磺隆敏感性遗传规律;利用BC1群体中的烟嘧磺隆敏感单株对该敏感基因进行SSR标记定位。结果表明,81个玉米自交系中有8个敏感,73个耐烟嘧磺隆;yn-6对烟嘧磺隆的敏感性由1对隐性核基因控制,该基因位于第5染色体短臂上5S-96和5S-78标记之间,物理距离约为0.18Mb,暂时将该基因命名为nsfy。

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