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以叶数较少、叶面积较小的烤烟品种丸叶为母本(P1),以叶数较多、叶面积较大的烤烟品种Coker319为父本,构建了6个世代分离群体,利用植物数量性状主基因+多基因混合遗传模型的联合分离分析方法,分析烤烟杂交组合丸叶×Co-ker319叶数、叶面积的遗传效应。结果表明:烤烟的叶数和叶面积均受2对加性-显性-上位性主基因+加性-显性-上位性多基因(E0)控制,其中叶数遗传以加性效应及显性×显性上位性效应为主,叶面积几种遗传效应差不多,其上位性效应>加性效应>显性效应,叶数和叶面积在B1世代的主基因遗传率分别为36.91%和2.13%,多基因遗传率分别为31.00%和19.53%,B2世代的主基因遗传率分别为51.60%和50.92%,多基因遗传率分别为16.84%和13.26%,F2世代的主基因遗传率分别为42.63%和30.32%,多基因遗传率分别为42.08%和12.18%,叶数和叶面积的主基因遗传率较高,适合在早代选择。
Flue-cured tobacco varieties with smaller leaf area and smaller leaf area were used as female parent (P1). Six generations of flue-cured tobacco Coker319 were used as the male parent with more leaves and larger leaf area. Quantitative trait gene + polygene mixed genetic model of the joint separation and analysis methods, hybrid combinations of flue-cured tobacco leaf × Co-ker319 leaf number, leaf area of the genetic effects. The results showed that leaf number and leaf area of flue - cured tobacco were controlled by two pairs of additive - dominance - epistatic major genes + additive - dominance - epistatic polygene (E0). The leaf number was inherited by additive effect and significant Sex × dominance epistasis, leaf area several genetic effects, the epistatic effect> additive effect> dominant effect, leaf number and leaf area in the B1 generation of the major gene heritability were 36.91% and 2.13 % And polygene heritabilities were 31.00% and 19.53% respectively. The heritability of major genes of B2 generations were 51.60% and 50.92%, respectively. The heritabilities of polygene were 16.84% and 13.26% respectively. The heritability of major genes of F2 generations were 42.63% and 30.32%, respectively. The polygene heritabilities were 42.08% and 12.18% respectively. The heritability of main genes of leaf number and leaf area was high, which was suitable for early generation selection.