野生稻抗白叶枯病遗传分析及转育效应研究

野生稻抗白叶枯病遗传分析及转育效应研究 GENETIC ANALYSIS AND BREEDING EFFECT FOR RESISTANCE TO BACTERIAL IN WILD RICE 舒理慧 1 2 3 first-author 廖兰杰 1 2 3 万焕桥 1 2 3 武汉大学生命科学学院 武汉大学生命科学学院 School of Life Sciences,Wuhan University School of Life Sciences,Wuhan University 武汉市东西湖农业科学研究所 武汉市东西湖农业科学研究所 武汉大学生命科学学院武汉市东西湖农业科学研究所 武汉大学生命科学学院武汉市东西湖农业科学研究所 研究了不同类型的野生稻对江陵６９１，ＰＸＯ６１和Ｔ７１７４三个白叶枯致病菌系的抗性遗传及转育效应．普通野生稻２号与四个栽培稻杂交组合Ｆ２群体的抗性遗传分析表明：普遍野生稻２号带有三对相互独立遗传的显性抗病基因；其中一对同时支配对供试三菌系的抗性，并且与显性基因Ｘａ－４和Ｘａ－７非等位，与隐性基因ｘａ－５及ｘａ－ｃ独立遗传；另两对则分别只控制对江陵６９１和Ｔ７１７４之一的抗性．利用杂种胚和Ｆ１幼穗培养，可有效地将非ＡＡ型野生稻抗病性转育至栽培稻之中． The inheritance and breeding effect of resistance to 3 strains of Xanthomonas campestris pv. oryzae, Jiangling 691 .PXO61 and T7174 in various types of wild rice were studied. Analysis of F1and F2 populations from the crosses between O.rufipogon and 4 rice cultivars （O.sativa ）,revealed that O.rufipogon has three dominant genes which are independent each other,one is responsible for resistance to the 3 strains used above and nonallilic to Xa-4 .Xa-7 .xa-5 or xa-c;the other two are considered to convey resistance to only one of Jiangling 691 and T7174 respectively. It is effective that resistance germ-plasm of non-AA karyotype wild riCes are translated to O. sativa by hybrid embryo and young panicles culture in vitro. 野生稻 白叶枯病 遗传分析 O.rufipogon bacterial blight genetic analysis S435.47 国家科技攻关项目,国家自然科学基金 1994-03-01 2021-04-01 3