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2017 - 201912020 - 20231
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Subject: Vegetable Science × Author: ARALIKATTI, OMKAR ×
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    ThesisItemOpen Access
    HETEROSIS AND COMBINING ABILITY STUDIES IN CHERRY TOMATO
    (UHF,NAUNI, 2023-02) ARALIKATTI, OMKAR; RAMESH KUMAR
    ABSTRACT The present study entitled “Heterosis and combining ability studies in cherry tomato” was carried out during the Kharif, 2020 and 2021 at the Experimental Farm, Department of Vegetable Science, College of Horticulture, Dr YSPUH&F, Nauni-173 230, Solan (HP), India to elucidate the information on the extent of parameters of variability, mean performance, heterosis, combining ability and nature and magnitude of gene action for various horticultural traits. The experimental material consisted of fifteen diverse parents (twelve lines and three testers) and thirty six F1 hybrids developed from line × tester design and a standard check. The genotypes were evaluated in Randomized Complete Block Design with three replications during Kharif, 2021. The analysis of variance indicated highly significant differences for all the traits studied. High coefficients of variation were found in number of number of fruits per 500g, number of fruits per cluster, number of fruit clusters per plant and average fruit weight. High heritability along with high estimates of genetic gain was observed for number of fruits per 500g, number of fruit clusters per plant, average fruit weight, fruit yield per plant, plant height and number of fruits per cluster. The Line × Tester studies concluded that parents UHF-CT-L-5, UHF-CT-L-7, UHF-CT-L-8, UHF-CT-L-11, UHF-CT-L-12, Punjab Red Cherry and Punjab Kesar Cherry and cross combinations UHF-CT-L-6 × Punjab Red Cherry, UHFCT- L-5 × Punjab Kesar Cherry, UHF-CT-L-3 × Punjab Red Cherry, UHF-CT-L-6 × Punjab Kesar Cherry, UHF-CT-L-11 × Punjab Red Cherry and UHF-CT-L-4 × Punjab Kesar Cherry on the basis of mean performance, general combining ability, specific combining ability and heterosis studies excelled well for all the traits studied. Gene action studies indicated predominance for non additive gene action for all the traits. Hence, these parents and cross combinations can be released as a substitute of already existing varieties/hybrids of cherry tomato after multi-locations testing.
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    ThesisItemOpen Access
    STUDIES ON GENETIC VARIABILITY IN TOMATO (Solanum lycopersicum L.)
    (UHF,NAUNI, 2017) ARALIKATTI, OMKAR; KANWAR, H.S.
    ABSTRACT The present investigation entitled “Studies on genetic variability in tomato (Solanum lycopersicum L.)” was carried out at Vegetable Research Farm, Department of Vegetable Science, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan (HP) during kharif season, 2016. The experiment was laid out in RCBD with three replications comprising of twenty five diverse genotypes of tomato including Solan Lalima as check variety. The observations were recorded on various characters viz., number of primary branches, plant height (cm), number of fruits per cluster, number of fruits per plant, number of fruit clusters per plant, average fruit weight (g), fruit yield per plant (kg), fruit yield per hectare (q), fruit shape index, pericarp thickness (mm), number of locules per fruit, total soluble solids (°B), harvest duration (days) and buckeye rot incidence (%).A wide and significant range of variability was observed for all the characters under study in all the genotypes. In the present investigation, it is concluded that the genotypes namely, UHSB-34, UHSB-28, UHSB-22, UHSB- 8 gave higher yield compared to rest of the genotypes, but the check variety Solan Lalima performed better over all the genotypes with respect to yield. High coefficients of variation were found in number of fruits per plant, number of locules, number of seeds per fruit, fruit yield per plant and fruit yield per hectare. High heritability along with high estimates of genetic gain was recorded for number of fruits per cluster, number of seeds per fruit, average fruit weight, fruit yield per plant and fruit yield per hectare. The path coefficient analysis depicted that number of fruits per cluster had the maximum positive direct effect on fruit yield per plant. The genetic divergence study depicted that the maximum inter cluster difference is in between the Cluster II and V.