Genetic Studies on Neutraceuticals, Industrial Quality Traits and Yield Components of Tomato (Solanum lycopersicum L.)
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Date
2016-07
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University of Agricultural Science, Dharwad
Abstract
ABSTRACT
Present study involved two different experiments of which first was to find genetic diversity and variability for neutraceuticals, industrial quality traits, yield and yield components in twenty eight genotypes of tomato. Diversity studies indicated that intercluster distance was maximum between clusters VIII and IX. Hence, it could be expected that the cross combinations involving genotypes from each of these clusters as parents might produce heterotic hybrids. Lycopene showed moderate to high coefficient of variation, whereas β-carotene, ascorbic acid and pH showed high PCV and GCV. Majority of yield related characters showed high PCV and GCV. The second experiment consisted of comparing the variability in two F2 populations of double cross hybrids of tomato and understanding the nature and type of dependency between characters. It was found that all major characters had higher PCV and GCV in double cross F2 populations. High heritability and genetic advance as per cent over mean was exhibited by both the populations for all characters except number of fruits per plant, number locules other wise which exhibited low to moderate heritability and GAM. The number of fruits and number of clusters were positively and highly associated with fruit yield per plant in both F2 populations. Polar length showed significant correlation only in the cross TSH-2 X TSH-3 F2. Path analysis revealed that number of fruits per plant exhibited highest positive direct effect on yield followed by average fruit weight, equatorial length, number of clusters, plant height and primary branches. Number of locules had exhibited significant negative direct effect on fruit yield per plant in both F2 populations.