抗白叶枯病水稻近等基因系的选育  

Development of Near-Isogenic Line with Resistance Gene to Bacterial Blight by Selection in Rice

作　　者：张欣[1] 施利利[1] 陈玉桂[1] 刘霞[1] 丁德亮[1] 边嘉宾[1] 郭玉华[2] 王松文[1] 

机构地区：[1]天津农学院,天津300384 [2]沈阳农业大学,沈阳110161

出　　处：《天津农学院学报》2003年第2期5-8,共4页Journal of Tianjin Agricultural University

基　　金：天津市导向重大项目"水稻分子标记育种"(973122711-3)

摘　　要：以沈农15为轮回亲本(RP),IRBB60为Xa 21基因供体(DP),经3代回交,2代自交,在分子标记辅助选择(molecularmarker assistedselection,MAS)条件下,构建了携有抗白叶枯病基因Xa-21的近等基因系。近等基因系农艺性状与沈农15相似,抗C2(河北菌株)、C5(广东菌株)等白叶枯小种。本研究所运用的分子育种程序既能消除外源遗传背景,又能使水稻品种的农艺性状得到有效改良。Using Shennong 15 as recurrent parent, IRBB60 as donor parent, through three generations of backcross and two generations of inbreeding, some nearisogenic lines(NIL) with a resistance gene Xa21 to bacterial blight are developed by MAS, which showed the similar agronomic performance with Shennong 15 and showed resistance to bacterial blight(BB). The strategies of molecular breeding in this research can not only eliminate the genetic background of donor parent, but also rapidly improve the agronomic performance of recurrent parent.

关 键 词：水稻 白叶枯病 近等基因系 Xa-21 分子标记辅助选择 

分 类 号：S511[农业科学—作物学] Q81[生物学—生物工程]