西葫芦果柄长主基因-多基因混合遗传分析

摘要

[ 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.%[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P、F、P、BC、BC和F6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.