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大豆胞囊线虫病(Soybean cyst nematode)严重危害我国大豆生产。我国大豆胞囊线虫有8个生理小种,其中,4号生理小种致病力最强,主要分布在黄淮海大豆产区。了解抗源的遗传模式有助于抗病基因的定位和分子标记的开发。以对大豆胞囊线虫4号生理小种高抗抗源CBL黑豆为父本、高感材料品75-14为母本,构建了F_1、F_2和F_(2∶3)3个世代群体,利用植物数量性状主基因+多基因混合遗传模型的联合分离分析方法,分析CBL黑豆抗大豆胞囊线虫4号生理小种的遗传效应。结果表明:CBL黑豆对胞囊线虫4号生理小种的抗性受2对加性-显性-上位性主基因和加性-显性-上位性多基因控制,F2世代主基因遗传率为64.47%,F_(2∶3)世代主基因遗传率为75.99%。主基因遗传率较高,育种可以在早代选择。
Soybean cyst Nematode seriously jeopardizes soybean production in China. China soybean cyst nematode 8 physiological races, of which 4 physiological races the strongest, mainly distributed in the Huang-Huai-Hai soybean production areas. Understanding the genetic mode of resistance helps in the mapping of disease resistance genes and the development of molecular markers. The three generations of F_1, F_2 and F_ (2: 3) population were constructed by using CBL black bean as the male parent and high sensitivity material 75-14 as the female parent. Genetic Analysis of CBL Black Bean Resistant to Soybean Cyst Nematode 4 by Means of Combined Analysis of Major Quantities + Multiple Genes. The results showed that the resistance of CBL black bean to cyst nematode 4 was controlled by two pairs of additive - dominance - epistatic genes and additive - dominance - epistatic polygenes. The heritability of the major gene of F2 generation was 64.47%, F_ (2: 3) generations of the main gene heritability was 75.99%. The heritability of major genes is high, breeding can be selected in the early generation.