齐319携带的南方玉米锈病抗性基因的遗传初析  

Inheritance of Resistance to Southern Corn Rust in the Inbred Line Qi319

作　　者：陈翠霞[1] 杨典洱[1] 王振林[2] 金德敏[1] 王洪刚[2] 王斌[1] 

机构地区：[1]中国科学院遗传与发育生物学研究所,北京100101 [2]山东农业大学农学院,泰安271018

出　　处：《Acta Genetica Sinica》2002年第10期903-906,T002,共5页

基　　金：国家"十五"攻关课题 (0 4-0 13 );"863"课题 (2 0 0 1AA2 11111)资助~~

摘　　要：我国选育的优良玉米自交系齐 319高抗南方玉米锈病。通过用病原菌接种齐 319分别与 5个不同感病自交系的杂交、回交 4个世代的P1、P2 、F1、F2 、BC1F110个分离群体和抗病感病参数的调查结果表明 :F1整齐一致 ,表现抗病 ;F2 和BC1F1抗感分离 ,经 χ2 检验分别符合 3∶1和 1∶1的分离比例。据此 ,齐 319携带的南方玉米锈病抗性基因是由显性单基因所控制。Southern corn rust (SCR) is a destructive disease in maize. The inbred line Qi319 is highly resistant to southern corn rust. The inheritance of resistance to southern rust in Qi319 was investigated. Five F 1 hybrids were derived from Qi319 crossed with five susceptible inbred lines respectively. The F 2 generations were produced by F 1 self pollinated and BC 1F 1 generations were abtained by backcrossing F 1 with the susceptible parents. Inoculation of the P 1\,P 2\,F 1 s and 10 individuals of F 2?BC 1F 1 were completed with the southern corn rust pathogen and showed that all of the 10 F 1 s were resistant,the all 5 F 2 populations segregated in a ratio of 3R∶1S,and all of the 5 BC 1F 1 populations segregated in a ratio of 1 R∶1S. Therefore,it is considered that Qi319 carries one dominant gene for resistance to southern corn rust.

关 键 词：齐319 南方玉米锈病 抗性基因 遗传分析 玉米自交系 

分 类 号：S435.13[农业科学—农业昆虫与害虫防治]