GENETIC ANALYSIS AND HETEROTIC STUDIES IN TOMATO (SOLANUM LYCOPERSICUM L.) HYBRIDS FOR FRUIT YIELD AND ITS RELATED TRAITS

A study was conducted to determine the types of gene action different yield-related traits in tomato and combining ability four advanced lines. The heterotic response hybrids also assessed. Analysis variance (ANOVA) revealed significant differences (P ≤ 0.05) among all traits. General (GCA) specific (SCA) for chosen were computed using Griffing’s approach diallel. Combining additive non-additive genetic effects selected T-1360 found as a good general combiner number cluster plant-1, average fruit weight, flowers cluster-1, length, yield. GCA SCA ratio less than 0.5 each trait, which confirmed presence action. results higher magnitudes phenotypic coefficient (PCV) genotypic (GCV). high heritability (72% 92%) advance (36.63% 139.72%) weight (g), fruits Among crosses, cross ST-100 × showed maximum positive heterosis over mid parent (566.6%) better (455.5%). identified genotypes can be used further breeding programs improve yield other