西葫芦果柄长主基因-多基因混合遗传分析

Analysis of Fruit Stalk Length Using Mixed Major Gene and Polygene Inheritance Model in Summer Squash

[目的]为西葫芦果柄长育种提供依据。[方法]选用西葫芦自交系配制q-1×23-4G(组合1)和q-1×A-7(组合2)2个组合,构建P1、F1、P2、BC1、BC2和F2 6个家系世代群体,应用植物数量性状主基因-多基因混合遗传模型对该6个世代群体果柄长进行多世代联合分析。[结果]2个组合西葫芦的果柄长性状遗传为加性-显性-上位性2对主基因(B-1)遗传模型;2个组合F2的主基因遗传率较低,环境影响相对较大。[结论]西葫芦果柄长育种宜采用个体选择法,可在晚世代选择。

[Objective] The aim was to provide scientific basis for breeding on the fruit stalk length of summer squash.[Method] Inheritance of the fruit stalk length traits of summer squash in P1,P2,F1,BC1,C2 and F2 from two crosses q-1×23-4G（cross 1） and q-1×A-7（cross 2） was investigated by the mixed major gene and polygene inheritance model of quantitative traits.[Result] The results showed that the fruit stalk length was controlled by B-1 model.Heritability value of the major genes of F2 was relatively low and environmental effect was relatively high.[Conclusion] To fruit stalk length,the method of individual selection on high separated generations was effective.