Abstract
Present study was carried out to determine the breeding potential ten tomato (Lycopersicon esculentum) varieties to develop resistant varieties for fruit borer, fruit cracking, blossom end rot, cat face, sunscald and blotchy ripening. Coefficients of variation, heritability and correlation coefficients were determined for this purpose. Significant varietal difference for all the resistant measured was observed. The coefficients of variability for phenotype were always greater then genotypic and environmental coefficients of variation for under study characters. High heritability for fruit borer resistant, cracked resist fruit, blossom end rot resist fruit, cat face resist fruit was observed. The positive significant relationships were obtain for Cracked resist fruit-Cat face resist fruit, Blossom end rot resist fruit-Sunscald resist fruit and Cracked resist fruit-Blotchy ripened resist fruit pairs.
Highlights
Tomato (Lycopersicon esculentum M., 2n=2x=24) is one of the Solanaceae fruit vegetable frequently eaten raw or cooked and processed whereas unripe green fruits are used for preparation of pickles and chutney [1]
The phenotypic appearance of the plant characters is primarily controlled by genetic constitution of a strain and the influence of environment on these characters, the genetic variance of any quantitative trait is composed of additive variance and non-additive variance and include dominance and epitasis [4]). 22.39-37.79 % loss in tomato yield was recorded in Karnataka state of India due to fruit borer (Helicoverpa armigera) [5]
This research provide the information on the resistant variation in the ten tomato genotypes assessed which can invariably serve as an index to selecting putative parents in breeding for new tomato varieties have more resistant against these disorders
Summary
Tomato (Lycopersicon esculentum M., 2n=2x=24) is one of the Solanaceae fruit vegetable frequently eaten raw or cooked and processed whereas unripe green fruits are used for preparation of pickles and chutney [1]. It is important as a chief source of lycopene (an antioxidant), ascorbic acid and ß-carotene and valued for its colour and flavor [2]. Varietal improvement demands a systematic study comprising identification and characterization of different varieties It is important for utilizing the suitable trait, and essential in the present time for protecting the distinctiveness of varieties [3].
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