Studies on genetic variability and heritability for quality traits of tomato (Lycopersicon esculentum Mill.) under heat stress conditions.
2005
Singh, Hardevinder | Cheema, D.S.
The present investigation was aimed to study the variation and heritability of quality characters in tomato genotypes raised under normal and high temperature conditions of Punjab. Fifteen advanced generation breeding lines of tomato along with four checks were evaluated for quality characters under normal and stress (high temperature) conditions. Maximum TSS, pericarp thickness, fruit firmness, acidity, lycopene content and dry matter was recorded in LT-36, LT-10, LT-39, LT-41, LT-16A and LT-36. Both genotypic and phenotypic components of variance were high during February planting for all the characters except for lycopene content and dry matter. High heritability coupled with low genetic advance for all the characters suggested the involvement of non-additive gene action in their inheritance which can be exploited through heterosis breeding.
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