水稻恢复系C161对条纹叶枯病的抗性遗传及相关QTL定位研究

被引:2
作者
郑文静 [1 ,2 ]
刘志恒 [1 ]
张燕之 [2 ]
刘欣 [3 ]
王昌华 [2 ]
赵家铭 [2 ]
机构
[1] 沈阳农业大学植物保护学院
[2] 辽宁省稻作研究所
[3] 沈阳农业大学生物科学技术学院
关键词
水稻; 条纹叶枯病抗性; 主基因+多基因混合遗传模型; QTL定位;
D O I
暂无
中图分类号
S511 [稻];
学科分类号
0901 ;
摘要
为了探明水稻对条纹叶枯病的抗性遗传机制,定位相关QTL,以感病保持系66B和抗病粳稻恢复系C161构建的DH群体为材料,利用人工接种技术,以各世代对条纹叶枯病的病情指数比率为表型值,对C161的抗病性进行遗传分析。结果表明:该群体对条纹叶枯病的抗性遗传由3对主基因加多基因控制,符合加性主基因+加性-显性多基因模型(G-2),利用Qgene软件采用复合区间作图法检测到3个与抗病相关的QTL,分别位于第1,9,11染色体上RM283-RM259、RM257-RM160和RM287-RM229标记区间内,LOD值分别为3.798,3.942和4.965;对表型变异的解释率分别为16.7%、17.2%和21.2%,分离分析的结果与QTL定位的结果相对一致,可相互印证。
引用
收藏
页码:3 / 7
页数:5
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