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

西葫芦果径主基因-多基因混合遗传分析(英文)

[Objective] The aim was to provide scientific basis for breeding on the fruit width of summer squash.[Method] Inheritance of the fruit width traits of summer squash in P1,P2,F1,BC1,BC2 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 fruit width was controlled by B-1 model.Heritability values of the major genes of F2 were relatively high and the environmental effect was relatively low.[Conclusion] The fruit width breeding of summer squash should be selected in early generation selection.

[目的]为西葫芦果径育种提供依据。[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F26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6个世代群体果径进行了多世代联合分析。[结果]2个组合的西葫芦的果径性状遗传为加性-显性-上位性2对主基因(B-1)遗传模型;2个组合F2的主基因遗传率较高,环境影响相对较小。[结论]西葫芦果径育种宜早代选择。