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本研究通过8个杂交组合F_1、F_2、F_3和B_1代的调查统计分析,研究大豆对灰斑病抗病性的遗传。结果表明:F_1代抗灰斑病为完全显性;F_2代抗病与感病按3:1比例分离;F_2代抗病单株后代(F_3代)即出现一定比例的抗病系。抗病性分离系与抗病系分离比例为2:1。F_1代以抗病亲本回交所产生的B_1代,均表现抗病;以感病亲本回交的B_1代,抗病与感病的分离比例为1:1。因此,大豆对灰斑病抗病性是由一对基因控制的简单遗传。
In this study, we investigated the inheritance of soybean disease resistance against Cercospora sojina by investigation and analysis of F_1, F_2, F_3 and B_1 generations in 8 hybrid combinations. The results showed that the resistance to gray leaf spot in F_1 generation was completely dominant; the resistance and susceptibility in F2 generation were separated by 3: 1 ratio; and the F_2 generation of offspring (F_3 generation) showed a certain proportion of resistant lines. Disease-resistant isolates and resistant lines isolated ratio of 2: 1. The F1 generation had the resistance to disease in generation B_1, which was produced by the backcross of the resistant parents. In the B_1 generation of backcrossing parents, the isolation ratio of disease resistance to susceptible was 1: 1. Therefore, the resistance of soybean to Cercospora sojae is a simple inheritance controlled by a pair of genes.