General and specific combining abilities (GCA and SCA) were estimated using six diverse lines of tomato. To obtain F₁s lines were crossed in full diallel mating fashion (Including reciprocal) to know combining ability effects for quality traits. The results indicated in general, that a particular cultivar or hybrid cannot be used to evaluate all studied characters with equal efficiency. Based on gca effects, parent P₆ and P₅ were found to be the good general combiner for shelf-life and titratable acidity whereas, parent P₅ and P₃ for ascorbic acid and P₅ for lycopene. The obtained results further illustrated that the best hybrid combination that exhibited highest positive values of SCA can combine to produce a hybrid with good general performance. F₁ hybrids from cross combinations, P₁ × P₆, P₃ × P₁ and P₆ × P₂ were recorded with good specific combiner for fruit shape index; P₁ × P₆, P₂ × P₅ and P₁ × P₅ for shelf-life; P₁ × P₃ and P₂ × P₃ for total soluble solids; P₁ × P₃, P₅ × P₆ and P₅ × P₂ for ascorbic acid; P₁ × P₄ for lycopene; P₄ × P₂, P₁ × P₅ and P₁ × P₆ for titratable acidity; P₁ × P₆ and P₂ × P₁ for number of locules per fruit; P₁ × P₅, P₆ × P₁ and P₂ × P₃ for pericarp thickness; P₁ × P₅, P₅ × P₂ and P₅ × P₄ for fruit colour.