数字农科院2.0

水稻抗白叶枯病基因Xa23的PCR分子标记定位及辅助选择

文献类型: 中文期刊

作者: 潘海军;王春连;赵开军;章琦;樊颖伦;周少川;朱立煌

作者机构:

关键词: Xa23;水稻白叶枯病;SSR;RAPD;MAS

期刊名称:作物学报

ISSN: 0496-3490

年卷期: 2003 年 29 卷 04 期

页码: 501-507

收录情况: 北大核心 ; CSCD

摘要: 用Xa2 3的近等基因系CBB2 3及其感病轮回亲本JG30构建了包含 2 5 6 2个单株的F2 作图群体。通过分析 5 71个感病单株 ,找到 2个新的与Xa2 3基因连锁的SSR标记RM187和RM2 0 6 ,它们与Xa2 3之间的遗传图距分别为 7 1cM和 1 9cM。通过筛选 12 0 0个RAPD引物 ,获得 2个与Xa2 3基因连锁的RAPD标记RpdH5和RpdS1184 ,与Xa2 3之间的遗传图距分别为 7 0cM和 7 6cM。利用丰富占 /CBB2 3、绿油占 /CBB2 3两个实际育种F2 群体 ,结合抗病性人工接种鉴定 ,测算了RpdS1184、RM2 0 6和RpdH5用于分子标记辅助选择 (MAS)的可能性。结果表明 ,对于丰富 2 3群体 ,RpdH5和RpdS1184的MAS准确率分别为 91 0 %和 87 3% ,如果同时使用这两个标记 ,可使MAS的准确率达 99%。对于绿油 2 3群体 ,RpdH5、RpdS1184和RM2 0 6的MAS准确率分别为 77 1%、81 1%和 80 8%。同时使用RpdH5、RpdS1184标记的MAS准确率为 90 3% ;同时使用RpdH5、RM2 0 6的准确率为 91 3% ;同时使用RpdH5、RM2 0 6、RpdS1184标记的准确率为 90 8%。

分类号: S435.111

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