The experimental material comprising six generations viz. P1 (P 4-5-2), P2 (Nemadoro), their F1, F2, BC1 and BC2 were used to study gene effects in tomato for seven economic characters. Additive-dominance model was adequate to explain total genetic variability for pH, number of locules and pericarp thickenss. For TSS, fruit shape index, fruit weight and total yield, degenic interaction model was adequate thus revealing the absence of higher order gene interactions. Based upon the best fit model, it is concluded that additive gene effects ([d] and [i]) were more important for TSS, number of locules and pericarp thickness. Non-additive gene effects ([h] and [i]) were more important for fruit shape index and fruit weight where as both additive and non-additive gene effects were important for total yield.
Gene effects, Genetic improvement, inheritance, L. esculantum
