大豆抗胞囊线虫基因不同世代遗传率的变化  

Analysis of Heritability of Genes Resistant to Soybean Cyst Nematode(Heterodera glycines Ichinohe) in Different Generations of Soybean

作　　者：卢为国[1,2] 袁道华[1,2] 李金英[2] 李海朝[2] 文自翔[2] 张辉[2] 

机构地区：[1]河南农业大学农学院,河南郑州450002 [2]河南省农业科学院经济作物研究所/国家大豆改良中心郑州分中心,河南郑州450002

出　　处：《河南农业科学》2010年第2期24-27,共4页Journal of Henan Agricultural Sciences

基　　金：国家科技支撑计划项目(2006BAD13B05);国家863计划(2006AA100104);河南省创新型科技人才队伍建设工程项目

摘　　要：大豆胞囊线虫(Heterodera glycines Ichinohe)是我国大豆的主要病害之一,研究大豆对胞囊线虫的抗性遗传对于培育抗病品种有重要意义。将大豆Essex×ZDD2315组合衍生的后代F2、F2∶3、BC1F2和BC1F4分别接种大豆胞囊线虫1号和4号生理小种,以研究大豆抗胞囊线虫基因不同世代抗性遗传率的变化。结果表明:ZDD2315对1号生理小种的抗性受主效基因控制,未发现多基因效应,在F2∶3、BC1F2和BC1F4世代,主基因遗传率分别为62.15%、72.02%和90.91%;ZDD2315对4号生理小种的抗性受主基因和多基因控制,在F2、F2∶3、BC1F2和BC1F4世代,主基因遗传率分别为65.03%、57.81%、67.76%和95.91%。说明大豆对胞囊线虫1号和4号生理小种的抗性主要受主效基因控制,主基因遗传率比较高,但不同世代检测到的主基因数不同,不同世代主基因遗传率不同,随着世代的提高,主基因遗传率也在提高,因此,育种上高世代选择效果更佳。Soybean cyst nematode （SCN） is one of the most important nation-wide soybean disea ses in China, study on the genetic rule of soybean resistance to SCN is of great importance to the development of resistant varieties . In the present study, inheritance of resistance to race 1 and race 4 of SCN was analyzed using different generations, F2, F2.3 , BC1 F2 and BC1 F4 of cross Essex× ZDD2315. Results showed that, in ZDD2315, major genes controlled the resistance to race 1. The heritability of major genes in F2：3, BC1F2 and BC1F4 were 62.15%, 72.02% and 90.91%, respectively. Both major genes and polygene controlled the resistance to race 4 in ZDD2315. The heritability of major genes in F2, F2= 3, BC1 F2 and BCI F4 were 65.03%, 57.81%, 67.76% and 95.91%, respectively. Therefore, SCN resistance of soybean was mainly controlled by major genes. Different number and heritability of major genes were detected in different gener- ations. The heritability of major genes increased in advanced generations. It could be concluded that selecting resistant lines in advanced generations will be reasonable.

关 键 词：大豆 胞囊线虫 遗传率 主基因+多基因混合遗传模型 

分 类 号：S565.1[农业科学—作物学]