【摘要】 以茎/叶性状不同的3个茎瘤芥自交系为亲本配制了2个杂交组合,对其P1、P2、F1、F2群体茎/叶性状的遗传体系应用主基因+多基因混合遗传模型分离分析方法进行了研究。结果表明:2个杂交组合的茎/叶性状遗传体系均由1对加性-显性主基因+加性-显性-上位性多基因(D-0)构成;F2世代的主基因遗传率为60.17%～68.74%,多基因遗传率为6.83%～10.23%;主基因以加性效应为主,且均有不同程度的负向显性效应。更多还原

【Abstract】 Three inbred lines with different ratio of stem and leaf were used as parents and deveoped 2 hybrids. Their genetic systems in stem/leaf ratio of P1 ,P2 ,F1 and F2 were analyzed by method of joint segregation analysis of major gene plus polygenes mixed inheritance model.The results showed that the genetic systems in stem/leaf ratio of these 2 hybridized combinations were constructed by one pair of additive-dominant major genes plus additive-dominant-epistatic polygenes(D-O).Heritability of the major genes and polygenes in F2 generations were 60.17%-68.74% and 6.83%-10.23%,respectively.The additive effects of the major genes were more important than their dominant effects,and dominant effects showed negative in various degrees in 2 hybridized combinations.更多还原