普通烟草栽培种内株高性状主基因加多基因遗传分析

Genetic Analysis of Plant Height using Mixed Major Gene plus Polygenes Inheritance Model in Culture Spawn of Nicotiana Tabacum L.

摘要: 以普通烟草栽培种烤烟类型品种分别与香料烟、白肋烟和名优晾晒烟类型品种组配的F1、F2及其亲本为研究对象，利用数量性状主基因+多基因遗传体系分离分析方法分析了3组合4世代株高性状的遗传规律。结果表明，3个组合的株高性状遗传均符合两对加性-显性-上位性主基因+加性-显性多基因混合遗传模型（E1），同时均存在加性、显性遗传效应。各主基因和多基因遗传率计算结果，烤烟与晒晾烟、烤烟与香料烟组合的主基因遗传率较高，分别为71.60%和88.55%，可作为烟草株高性状早期世代选择的理论依据。

Abstract: The mixed major-gene plus polygene inheritance model was used to analyze the inheritance of plant height in culture spawn of Nicotiana tabacum L. cross between flue-cured tobacco and burley tobacco, oriental tobacco, sun-cured tobacco. The results showed that the plant height was controlled by the same model (E1), and there were additive gene effect and dominant gene effect in the three cross combinations; the heritability of major genes for G-28×Qiancengta and G-28×Basma, were 71.60% and 88.55% respectively. The higher heritability will provide the theoretical basis for choosing the plant height at earlier generation.