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为了解脂肪氧化酶(LOX)活性基因的遗传规律,利用单个分离世代群体遗传分析方法对“鲁麦22×扬麦9号”的F2群体及F2∶3家系群体的LOX活性分布、相关性及遗传组成进行了分析。结果表明,F2与F2∶3家系的LOX活性分布相似,并极显著相关(R2=0.714);该组合的LOX活性主要受两对主基因控制,且主基因显示为加性-显性-上位性效应。对于F2群体,两对主基因遗传率为78.2%,第一对主基因的加性效应、显性效应和显性度分别为4.09、-2.1和-0.51;第二对主基因分别为2.1、-0.77和-0.37;对于F2∶3家系群体,主基因遗传率为81.2%,第一对主基因加性效应、显性效应和显性度分别为3.11、-0.49和-0.159;第二对主基因分别为1.828、-0.1、-0.056。在F2及F2∶3家系中,两对主基因均表现为负向显性效应,其加性×加性上位(互作)效应、加性×显性(显性×加性)效应和显性×显性互作效应都不为0,说明二者存在明显互作效应。
In order to understand the genetic law of lipoxygenase (LOX) -activated genes, the LOX activity distribution of F2 population and F2: 3 pedigree of “Lumai 22 × Yangmai 9 ” was analyzed by single segregating population genetic analysis Sexual and genetic components were analyzed. The results showed that the LOX activities of F2 and F2: 3 families were similar and highly significant (R2 = 0.714). The LOX activity of this combination was mainly controlled by two pairs of major genes and the major genes showed additive-dominance- Sexual effects. For F2 population, the heritability of two major genes was 78.2%. The additive effect, dominant effect and dominant degree of the first pair of major genes were 4.09, -2.1 and -0.51, respectively. The second pair of major genes were 2.1, -0.77 and -0.37 respectively. For the F2: 3 pedigree population, the heritability of the major gene was 81.2%. The additive effect, dominant effect and dominant degree of the first pair of major genes were 3.11, -0.49 and -0.159, respectively. The second pair The main genes were 1.828, -0.1, -0.056. In F2 and F2: 3 pedigrees, the two major genes showed a negative dominance effect with additive × additive superior (interaction) effect, additive × dominant (dominant × additive) effect and significant Sex × dominant interaction effect is not 0, indicating that there is a clear interaction between the two effects.