Analysis of Genetic Effects of Major Agronomic and Quality Characters in Tobacco(Nicotiana tabaccum L.)
烟草主要数量性状的遗传效应分析 Analysis of Genetic Effects of Major Agronomic and Quality Characters in Tobacco(Nicotiana tabaccum L.)

Two tobacco F1 hybrids,F2s,backcrosses B1s and B2s and their parents P1 and P2 were used to estimate the gene effects for 7 agronomic and 4 quality characters.The additive dominance genetic model was not fit for all characters.The additive effects and the epistatic effects of most characters were significant,but the dominant effect not.The epistatic effects could not be ignored in tobacco breeding.They were one of main causes of heterosis for most characters.