Genetic variability and correlation studies on growth, yield and quality of tomato (Solanum lycopersicum L.)

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dc.contributor.advisorKumar, Udit
dc.contributor.authorPatel, Pushpam
dc.date.accessioned2018-02-07T10:21:05Z
dc.date.available2018-02-07T10:21:05Z
dc.date.issued2017
dc.description.abstractA study was conducted at Vegetable Research Farm, Dr. RPCAU, Pusa, Samastipur, Bihar during rabi 2015-16 to evaluate the genotypes of tomato (Solanum lycopersicum L.) for yield and quality. Investigation was carried out on variability, character association, path analysis and genetic divergence for morpho-physiological characters viz., Plant height at maturity, Number of primary branches per plant, Days to flower initiation, Days to fruit initiation. Days to fruit maturity at physiological stage, Diameter of fruit, Length of fruit, Number of locules per fruit, Number of fruits per plant, Average fruit weight, Fruit yield per plant, Fruit yield per hectare, Total soluble solid, Titrable acidity, Zinc content, Iron content, Lycopene content and Ascorbic acid content. 24 genotypes were grown in Randomized Block Design with three replications. Analysis of variance revealed highly significant differences among the genotypes for all the characters except iron content. The genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were high for lycopene content, average fruit weight, number of fruits per plant, fruit yield per hectare, fruit yield per plant, titrable acidity, number of locules per fruit, number of primary branches per plant, ascorbic acid and plant height at maturity. All characters were highly heritable in broad sense except iron content. All the characters had showed high heritability coupled with high genetic advance as per cent of mean except days to flower initiation, days to fruit initiation, days to fruit maturity at physiological stage, zinc & iron content indicating the presence of additive gene effects which may be utilized for improvement through phenotypic selection for yield improvement. Character association among the yield and yield attributing traits and identify better combinations as selection criteria for developing high yielding tomato genotypes. Fruit yield per plant was positively correlated with number of primary branches per plant, fruit diameter, fruit length, number of fruits per plant, average fruit weight, total soluble solid, days to flower initiation and titrable acidity suggesting that selection based on these characters would result better genotypes with higher yield. Among them number of primary branches per plant, fruit diameter, fruit length, number of fruits per plant were highly significantly correlated with yield per plant and average fruit weight and total soluble solid significantly correlated with yield per plant. Path coefficient analysis study revealed positive direct effect for plant height at maturity, number of primary branches per plant, days to flower initiation, days to fruit maturity at physiological stage, fruit length, number of locules per fruit, number of fruits per plant, average fruit weight, total soluble solid, titrable acidity and ascorbic acid on fruit yield per plant and selection based on these 18 characters would be more reliable for yield improvement. The 24 genotypes of tomato were grouped into five clusters using Tocher method. The genotypes in cluster IV and cluster II followed by cluster III and II and cluster V and II, due to maximum inter cluster distance between them, exhibited high degree of genetic diversity and thus may be utilized under inter varietal hybridization programme (transgressive breeding) for getting high yielding recombinants. Cluster IV was suitable for number of primary branches per plant, diameter of fruit, length of fruit, average fruit weight, yield per plant and yield per hectare. Therefore, selection of parents from this cluster for these traits would be effective. Maximum contribution towards divergence was obtained by lycopene content, average fruit weight, & ascorbic acid. All together they have contributed 67%.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810040562
dc.keywordsTomato, Genetic variability, Correlation, Solanum lycopersicum, Character association, Path analysisen_US
dc.language.isoenen_US
dc.pages78+xvii+iien_US
dc.publisherDr. Rajendra Prasad Central Agricultural University, Pusa (Samastipur)en_US
dc.subHorticultureen_US
dc.subjectnullen_US
dc.themeGenetic variability and correlation studies of tomatoen_US
dc.these.typeM.Scen_US
dc.titleGenetic variability and correlation studies on growth, yield and quality of tomato (Solanum lycopersicum L.)en_US
dc.typeThesisen_US
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