数字农科院2.0

水稻白叶枯病抗性基因定位及其小种专化性

文献类型： 中文期刊

作者： 罗利军;梅捍卫;赵新华;钟代彬;王一平;余新桥;应存山;ZhikangLi;A.H.Paterson;DaolongWang;R.Tabien;L.Zhu;J.W.Stansel

作者机构：

关键词： 白叶枯病;RFLP;QTL;小种专化性

期刊名称：中国科学C辑:生命科学

ISSN：

年卷期： 1998 年 06 期

页码： 57-62

摘要： 利用 3个致病性不同的水稻白叶枯病菌小种 ,对由Lemont/特青培育的 31 5个F10 重组自交系群体进行抗性基因 (QTL)RFLP分析 .共发现 1个主基因、1 0个QTL及 9对互作位点与白叶枯病菌抗性有关 .其中 ,主基因Xa4定位于第 1 1染色体上 .Xa4对CR4和CX0 8表现显性主基因遗传 ,但对CR6则表现为一个主要的加性QTL的作用 .主基因小种专化性明显大于QTL .QTL之间以及QTL与主基因之间效应累加 ,共同提供抗病性的强度和稳定性 .在感病亲本中 ,亦存在抗性QTL .因此 ,来源不同的中抗材料可能是水平抗性的良好基因源 .研究还表明 ,所定位的QTL与其他研究发现的抗不同病原菌的基因 (QTL)处于相近的染色体位置 ,意味着它们可能是同一抗性基因族的成员 .

分类号： Q943

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