STUDIES ON GENETIC VARIABILITY IN TOMATO (Solanum lycopersicumL.) GENOTYPES FOR DIFFERENT HORTICULTURAL TRAITS

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dc.contributor.advisorBHARDWAJ, M.L.
dc.contributor.authorNITISH, KUMAR
dc.date.accessioned2017-05-12T08:01:26Z
dc.date.available2017-05-12T08:01:26Z
dc.date.issued2014
dc.description.abstractABSTRACT The present investigations entitled “Studies on genetic variability in tomato (Solanum lycopersicum L.) genotypes for different horticultural traits” was carried out at the Research Farm, Department of Vegetable Science, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.) during Kharif, 2013 to evaluate diverse germplasm of tomato. The experiment was laid out in a RCBD with three replications. In this study, thirty five genotypes including one check cultivar were evaluated for different horticultural traits. The observations were recorded on days to 50% flowering, number of fruits per cluster, number of fruits per plant, average fruit weight (g), fruit yield per plant (kg), fruit yield per plot (kg), fruit yield per hectare (q), fruit shape index, number of locules per fruit, pericarp thickness (mm), plant height (cm), harvest duration (days), days to marketable maturity, total soluble solids ( o B), ascorbic acid content (mg/100g), fruit colour, buckeye rot incidence (%) and alternaria blight severity (%). Analysis of variance showed significant differences among genotypes for all the characters under study. The genotypes JTS-10-1, JTS-10-2, Yalabingo, EC-37239, EC-267727, LE-79-5, BT-10, EC-191535-3 and JTS-1-1 gave highest fruit yield. High phenotypic and genotypic coefficients of variation were depicted for the character like number of fruits per plant, fruit yieldper plant, fruit yield per plot, fruit yield per hectare and plant height. High heritability coupled with high genetic gain were recorded for number of fruits per plant, plant height, average fruit weight and fruit yield per plant,per plot and per hectare. Hence selection can prove effective for improvement in yield. High heritability coupled with moderate genetic gain was observed for number of fruits per cluster, harvest duration and ascorbic acid content. Therefore, these characters also show some scope for improvement through selection. A highly significant and positive phenotypic and genotypic correlation of fruit yield per plant was observed with plant height,number of fruits per plant, harvest duration, number of fruits per cluster, total soluble solids and average fruit weight. Maximum positive direct effect towards fruit yield per plant was contributed by number of fruits per plant followed by harvest duration and average fruit weight. The maximum negative direct effect towards yield was recorded by days to marketable maturity. Further, these genotypes were grouped into four divergent clusters and hybridization between cluster I and IV gives maximum heterotic combinations.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810011059
dc.keywordstomato (Solanum lycopersicum L.,genetic variability ,genotypes for different horticultural traitsen_US
dc.language.isoenen_US
dc.publisherUHF,NAUNIen_US
dc.subVegetable Scienceen_US
dc.subjectnullen_US
dc.themetomato (Solanum lycopersicum L.,genetic variability ,genotypes for different horticultural traitsen_US
dc.these.typeM.Scen_US
dc.titleSTUDIES ON GENETIC VARIABILITY IN TOMATO (Solanum lycopersicumL.) GENOTYPES FOR DIFFERENT HORTICULTURAL TRAITSen_US
dc.typeThesisen_US
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