烤烟淀粉含量的配合力与遗传分析

为了解烤烟烤后中部烟叶淀粉含量的遗传规律,选用K326、NC89、翠碧一号和红花大金元等4个品种,按完全双列杂交设计,采用Griffing方法Ⅰ进行配合力分析,并应用植物数量性状"主基因+多基因"混合遗传模型对K326×红花大金元组合P1、P2、F1和F2等4个世代群体进行遗传分析。结果表明:烤烟烤后中部叶淀粉含量的遗传主要受细胞核效应的影响,一般配合力方差和特殊配合力方差达极显著水平,一般配合力方差大于特殊配合力方差,翠碧一号的一般配合力表现为较高的正向效应,K326的一般配合力表现为较高的负向效应;K326×红花大金元组合烤后中部叶淀粉含量的遗传符合2对加性-显性-上位性主基因+加性-显性多基因模型(E-1),主基因遗传率(h_(mg)~2)为49.53%。

Analysis of Combining Ability and Inheritance on Starch Content in Flue-cured Tobacco Leaves

In order to understand the genetic regularities of starch content in flue-cured tobacco leaves,four flue-cured tobacco varieties were used as the parents in a complete diallel mating design.Analysis of combining ability was conducted by Griffing-Ⅰ.Inheritance of starch content in flue-cured leaves in P1,P2,F1 and F2 from the cross K326× Honghuadajinyuan was investigated by the mixed major gene plus polygene inheritance model of quantitative traits.The results indicated that starch content in the flue-cured tobacco was controlled by nucleolus inheritance.The significant differences in starch content of GCA and SCA effects existed among parents,and the GCA effect was mainly.The GCA of Cuibiyihao showed positive effect,the GCA of K326 showed negative effect.Starch content in flue-cured leaves of the cross K326×Honghuadajinyuan was controlled by two adding-dominanceepistatic major gene plus adding-dominance polygene model.The heritability of major gene was 49.53％.