Department of Botany, S.G.R.R. College, Dehradun, India.
Theor Appl Genet. 1985 Apr;70(1):80-4. doi: 10.1007/BF00264486.
Sixty families from two tomato triple test crosses (S120 x EC61747 and EC31513 x 'Tusa Ruby') were raised in complete randomized blocks in two replications and two environments (two fertilizer levels). Jinks and Perkins' (1970) analysis was used to detect and estimate the additive, dominance and epistatic components of genetic variation for flowering time, maturity period, number of branches per plant, final height, shape index of fruit, locule number, number of fruits per plant, yield per plant and weight per fruit. The j & 1 type epistasis was more important than the i type epistasis in the first cross, while in the second cross the two components of epistasis played almost equal roles in the control of characters studied. Both the D (additive) and H (dominance) components were significant for most of the characters in both crosses and in both the environments. The D component was relatively more important than the H component in the first cross, while the situation was just the reverse in the second cross. Dominance was directional in 8 out of 36 cases. Ambidirectional dominance was observed in 27 cases. A real absence of dominance was observed in one case only.
从两个番茄三交组合（S120xEC61747 和 EC31513x'Tusa Ruby'）中选出的 60 个家系，在两个环境（两种施肥水平）的两个重复完全随机区组中种植。采用 Jinks 和 Perkins（1970）的分析方法，检测和估算开花时间、成熟期、株分枝数、株高、果实形状指数、心室数、每株果数、单株产量和单果重的遗传变异的加性、显性和上位性分量。在第一个杂交中，j&1 型上位性比 i 型上位性更重要，而在第二个杂交中，上位性的两个分量在控制所研究的性状方面几乎起着同等的作用。在两个杂交和两个环境中，大多数性状的 D（加性）和 H（显性）分量都是显著的。在第一个杂交中，D 分量比 H 分量相对更重要，而在第二个杂交中则恰恰相反。在 36 个案例中有 8 个存在显性方向，在 27 个案例中存在双向显性，只有 1 个案例不存在显性。
