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水稻白叶枯病抗性基因鉴定进展及其利用
引用本文:章琦.水稻白叶枯病抗性基因鉴定进展及其利用[J].中国水稻科学,2005,19(5):453-459.
作者姓名:章琦
作者单位:中国农业科学院作物育种栽培研究所,北京,100081
基金项目:国家自然科学基金资助项目(39470438,39970452);美国洛克菲勒基金资助项目(RF97001,*586)
摘    要: 1982~1987年,日本热带农业研究中心(TARC)和国际水稻研究所(IRRI)合作采取统一研究方案,创建了国际水稻白叶枯病抗性鉴别系统。统一了命名,删去了重复(包括与Xa3相同的Xa4b、Xa6和xa9)。截至2005年6月,经国际注册确认和期刊报道的水稻白叶枯病抗性基因共30个,其中 Xa22(t)、Xa26(t)、xa26(t)、Xa27(t)、xa28(t)、Xa29(t)和3个Xa25(t)为暂定名基因,有待订正。在30个基因中,21个为显性基因(Xa),9个为隐性基因(xa);13个表现全生育期抗性,15个为成株期抗性,Xa21和Xa25(t) (O. minuta)两个基因在分蘖后期表达抗性。已被定位的抗性基因有17个,即第11染色体上有7个,Xa3、Xa4、Xa10、Xa21、Xa22(t)、Xa23和Xa26;第4染色体上有4个,Xa1、Xa2、Xa12和Xa14;第5染色体上有2个,xa5和xa13;第6染色体上有Xa7和Xa27;第12染色上有Xa25(t);第1染色体上有Xa29(t)。包括Xa1、xa5、Xa21、Xa26五个基因已被克隆。并讨论了合理利用抗性基因等问题。

关 键 词:水稻  白叶枯病  抗性  基因鉴定
文章编号:1001-7216(2005)05-0453-07
收稿时间:2004-12-22
修稿时间:2004-12-222005-05-08

Highlights in Identification and Application of Resistance Genes to Bacterial Blight
ZHANG Qi.Highlights in Identification and Application of Resistance Genes to Bacterial Blight[J].Chinese Journal of Rice Science,2005,19(5):453-459.
Authors:ZHANG Qi
Abstract:The international differential system for resistance to bacterial blight(BB) was established using a common base of research methods by collaborative studies between Tropical Agricultural Research Center(TARC) and International Rice Research Institute(IRRI) in 1982-1987.Up to June 2005,there are a total of 30 BB resistance genes registered internationally or reported in international journals.Among them,the genes Xa22(t),Xa26(t),xa26(t),Xa27(t),Xa28(t),Xa29(t) and three Xa25(t) were tentatively designated and subjected to further be re-arranged.Twenty-one and 9 out of the 30 Xa genes are dominant and recessive,respectively.Thirteen genes exhibit all-growth-stage resistance,two genes Xa21 and Xa25(t)(O.minuta) express resistance at the later tillering stage,and the other 15 genes confer only adult-stage resistance.Seventeen Xa genes were mapped,including Xa3,Xa4,Xa10,Xa21,Xa22(t),Xa23,and Xa26 on chromosome 11; Xa1,Xa2,Xa12,and Xa14 on chromosome 4;xa5 and xa13 on chromosome 5;Xa7 and Xa27(t) on chromosome 6;Xa25(t) on chromosome 12;and Xa29(t) on chromosome 1.Five Xa genes were cloned,including Xa1,xa5,Xa21,Xa26 and Xa27.Application of resistance to bacterial blight was also discussed.
Keywords:rice  bacterial blight  resistance  gene identification
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