体细胞突变体HX-3对水稻白叶枯病的抗性遗传  

Inheritance of resistance to bacterial blight in somaclonal mutant HX-3 ( indica )

作　　者：高东迎[1] 孙立华[2] 陆作楣[1] 

机构地区：[1]南京农业大学农学系,江苏南京210095 [2]江苏省农业科学院遗传生理研究所,江苏南京210014

出　　处：《西南农业学报》2001年第2期41-43,共3页Southwest China Journal of Agricultural Sciences

基　　金：国家"九五"重点攻关项目 (编号 :96 -C0 1-0 1-0 1)资助项目

摘　　要：采用离体筛选技术 ,从感白叶枯病的恢复系明恢 63的体细胞突变后代中获得抗病突变体HX 3。对HX 3的白叶枯病抗性遗传进行了研究。结果表明 ,HX 3对水稻白叶枯病的抗性能够稳定遗传 ,且为全生育期抗性 ,其抗性由一对显性单基因控制 ;HX 3与具有不同抗病基因的抗白叶枯病近等基因系CBB2 (Xa 2 )、CBB3 (Xa 3)、CBB4 (Xa 4 )、CBB7(Xa 7)、CBB12(Xa 12 )和IRBB2 1(Xa 2 1)间的等位性分析表明 ,HX 3的抗病基因与Xa 2、Xa 3、Xa 4、Xa 7、Xa 12、Xa 2 1不等位。Through selection in vitro,a resistance somaclonal mutant HX-3 was obtained from the mutant seeds of Minghui 63 which was a restorer line susceptable to bacterial blight.The result showed the resistance of HX-3 ( indica ) could be inherited stably, and the resistance was expressed in the whole growth stages and was controlled by a pair of singly dominant gene.The allele tests between HX-3 and CBB2(Xa-2),CBB3(Xa-3),CBB4(Xa-4),CBB7(Xa-7),CBB12(Xa-12)and IRBB21(Xa-21)indicated that the resistance gene in HX-3 was nonallelic to Xa-2,Xa-3,Xa-4,Xa-7,Xa-12 and Xa-21.

关 键 词：体细胞突变体 水稻 白叶枯病 抗性遗传 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]