西葫芦果肉厚主基因-多基因混合遗传分析(英文)

目的]分析西葫芦果肉厚遗传特性,指导西葫芦果肉厚育种实践。方法]通过西葫芦自交系配制q-1×23-4G(组合1)和q-1×A-7(组合2)2个组合,构建6个世代群体,应用植物数量性状主基因-多基因混合遗传分析方法,分析不同组合西葫芦果肉厚的遗传表现。结果]2个组合的西葫芦的果肉厚性状遗传为一对加性主基因+加性-显性多基因(D-2)遗传模型;2个组合以多基因的显性效应为主;F2的基因遗传率较低,环境影响较高。结论]西葫芦果肉厚育种宜采用个体选择法,可在晚世代选择。

Analysis of Flesh Thickness of Summer Squash by Using Mixed Major Genes and Polygene Inheritance Model

Objective]The aim was to study the inheritance of flesh thickness,so as to provide a theoretical basis for breeding of thicker-flesh summer squash variety.Method]Using mixed major genes and polygene inheritance model,a joint analysis of six generations from two crosses q-1×23-4G(Cross 1)and q-1×A-7(Cross 2)was conducted to investigate the inheritance of the flesh thickness of summer squash.Result]The results showed that the flesh thickness was controlled by D-2 model(a pair of additive major genes plus additive-dominant polygene);genetic effect of flesh thickness in the two crosses was mainly the dominant effect of polygene.Heritability values of the genes of F2 generation were relatively low,while the environmental effect was great.Conclusion]To flesh thickness,the method of individual selection on high separated generations was effective in the breeding of summer squash with thick flesh.