黄瓜黄色线与瓜长比的主基因+多基因的遗传分析

选用2个性状稳定的自交系黄瓜,配成正反2个组合,测定结果表明,正反交组合黄色线与瓜长比的差异不大,表明黄色线遗传受核基因控制。应用主基因 多基因混合模型分析方法对黄瓜组合(M25×M67)的6个家系世代(P1,P2,F1,B1,B2,F2)的黄色线和瓜长比进行遗传分析。结果表明:黄色线比例遗传受1对加性-显性主基因 加性-显性多基因(D模型)控制。分离世代中,B1,B2,F2世代的主基因遗传率(h2mg)为95.8%,93.39%和14.99%;多基因遗传率(h2pg)在1.36%~54.04%。主基因加性效应(d)和显性效应(h)值分别为-41.78和-35.96。黄色线的遗传可能是受1对加性-显性主基因 加性-显性多基因控制。

Inheritance on Major Gene Plus Poly-genes of Yellow Line and Fruit Length Ratio of Cucumber

Select two cucumbers which were stable personality and different ecotype.Then mix two positive and negative combinations.The result of joint analysis showed that it was not obvious discrepancy between the positive and negative combinations about ratio of yellow line and fruit length.It showed that yellow line was subjected by nucleus gene.In this paper inheritance of the yellow line and fruit length ratio of cucumber was investigated by joint analysis and the major gene plus poly-genes model of quantitative traits analysis of multi-generation(P1,P2,F1,B1,B2,F2).Another analysis showed that the inheritance of yellow line ratio was controlled by a major gene with additive-dominance effects plus polygene with additive-dominance effects(the D model).Heritability values of the major genes of B1,B2 and F2 population were estimated as 95.8%,93.39%and 14.99%.Heritability values of poly-genes were between 1.36% and 54.04%.The major gene plus poly-genes effect(d)and dominance effect(h)was-41.78 and-35.96 respectively,and the additive-dominance effects of this analysis were both negative with small difference.So the inheritance of the yellow line may be controlled by a major gene with additive-dominance effects plus polygene with additive-dominance effects.