普通煙草栽培種內(nèi)株高性狀主基因加多基因遺傳分析

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

摘要: 以普通煙草栽培種烤煙類型品種分別與香料煙,、白肋煙和名優(yōu)晾曬煙類型品種組配的F1、F2及其親本為研究對象,，利用數(shù)量性狀主基因+多基因遺傳體系分離分析方法分析了3組合4世代株高性狀的遺傳規(guī)律,。結(jié)果表明，3個組合的株高性狀遺傳均符合兩對加性-顯性-上位性主基因+加性-顯性多基因混合遺傳模型（E1）,，同時均存在加性,、顯性遺傳效應(yīng)。各主基因和多基因遺傳率計算結(jié)果,，烤煙與曬晾煙,、烤煙與香料煙組合的主基因遺傳率較高，分別為71.60%和88.55%,，可作為煙草株高性狀早期世代選擇的理論依據(jù),。

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.