GENETIC EVALUATION OF TOMATO (Solanum lycopersicum L.) GERMPLASM FOR YIELD AND QUALITY TRAITS
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Date
2019-11-14
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COLLEGE OF HORTICULTURE AND FORESTRY, DR Y S P UHF, NERI, HAMIRPUR
Abstract
The present investigation entitled “Genetic evaluation of tomato (Solanum lycopersicum L.) germplasm for yield and quality traits” was conducted at the experimental farm of RHR&TS, Jachh, Kangra, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh during the year 2018. Twenty five diverse genotypes of tomato comprising of eleven varieties, ten exotic lines and three local collections along with one standard check Solan Lalima were evaluated in Randomized Complete Block Design with three replications to ascertain extent of variability, heritability, genetic advance and gain, correlation and path coefficient analysis for yield and other horticultural traits along with the estimation of genetic divergence among the genotypes. Analysis of variance revealed significant differences among all the genotypes for all the characters under study. On the basis of overall performance, EC-802557, LC-2 and Arka Alok were found superior for marketable fruit yield and other important horticultural traits. They could be the promising parents for utilization in further breeding programmes. The estimates of PCV and GCV were high for marketable fruit yield per plant, number of locules per fruit, average fruit weight, harvest duration, shelf life and number of fruits per cluster. High heritability estimates were observed for all the traits among all genotypes while high estimates of genetic gain were observed for marketable fruit yield per plant, average fruit weight, harvest duration, shelf life, number of fruits per cluster, number of locules per fruit, number of fruits per plant, fruit breadth, pericarp thickness, number of fruit cluster per plant, fruit length and plant height. The correlation studies revealed that marketable fruit yield per plant had positive and significant correlation with fruit length, fruit breadth, average fruit weight, number of fruit clusters per plant, number of fruits per plant, number of locules per fruit, harvest duration, shelf life, pericarp thickness and total soluble solids. The path coefficient analysis revealed that maximum positive direct effect towards marketable fruit yield per plant was contributed by average fruit weight followed by fruit length, number of locules per fruit, fruit breadth and total soluble solids. Under genetic divergence studies, 25 genotypes were grouped in to five clusters and maximum inter cluster distance was recorded between cluster I and IV and lowest was observed between cluster I and V. Therefore, hybridization among the genotypes of cluster I and IV can be utilized to obtain superior hybrids or recombinants in later segregating generations.
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