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利用BSA法检测水稻条纹叶枯病高效应抗性位点

DOI: 10.7668/hbnxb.2014.02.016, PP. 85-88

Keywords: 水稻,条纹叶枯病,群体分离分析法,QTL定位

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Abstract:

通过前期对江苏水稻地方品种抗条纹叶枯病资源的筛选获得的一份高抗条纹叶枯病水稻品种旱稻,配制其与条纹叶枯病感病品种武育粳3号杂交组合,采用田间自然接种鉴定方法,以病情指数为表型值,对141个F2单株的F2:3株系进行了条纹叶枯病抗性鉴定。同时利用群体分离分析法(Bulkedsegregantanalysis,BSA法)对抗/感DNA池分析发现第11染色体SSR标记RM209、RM21与条纹叶枯病抗性有明显的连锁关系。利用基于完备复合区间作图方法的QTL检测软件(QTLIciMappingV3.2)在第11染色体上检测到一个条纹叶枯病抗性相关QTL,位于SSR标记RM209和RM21之间,LOD值为13.25,可解释表型变异38.39%,加性效应为负值,表明该数量性状基因座对水稻条纹叶枯病的抗性来自抗病亲本旱稻。

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