Studies on genetic variability for morpho-economical traits in tomato (Solanum lycopersicon (Mill.) Wettsd.)
Loading...
Date
2016-07-05
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
ANDUAT, Kumarganj, Ayodhya
Abstract
The present investigation entitled “Studies on genetic variability for morpho-economical traits in tomato (Solanum lycopersicon (Mill.) Wettsd.)” was executed at Main Experiment Station, Department of Vegetable Science, Narendra Deva University of Agriculture and Technology, Narendra Nagar (Kumarganj), Faizabad. during Rabi, 2014-2015, to assess variability, heritability and genetic advance for quantitative characters, to estimate correlation coefficients among the important economic traits, to find out the direct and indirect effect of yield components on yield by path coefficient analysis and to judge the genetic divergence in the available genotypes of tomato. Experimental material for the study consisted of 46 genotypes including 3 checks (DVRT-2, H-24, H-86). The experiment was conducted in Randomized Complete Block Design with three replications. Each treatments consisted of 20 plants in two row, having spacing of 60 cm X 45 cm. Observations were recorded on thirteen quantitative characters viz. days to 50 per cent flowering, plant height (cm.), primary branches per plant, number of fruits per plant, days to first fruit harvest, average fruit weight (g.), fruit circumference (cm), pericarp thickness (cm), number of locules per plant, TSS (%), fruit length (cm), harvesting duration and fruit yield per plant (kg).
The analysis of variance revealed that the mean sum of squares due to treatments was found highly significant for all the characters. The higher magnitude of coefficient of variation at phenotypic as well as genotypic levels was observed for number of locules per fruit and plant height (cm). While low GCV and PCV were observed for days to 50 per cent flowering and days to first fruit harvest. High heritability coupled with high genetic advance in per cent of mean was recorded for number of fruits per plant, plant height, primary branches per plant, fruit circumference and number of locules per fruit indicating that these traits were less influenced by environment. The most important trait yield per plant had exhibited highly significant and positive phenotypic correlation with number of fruits per plant, plant height (cm), primary branches per plant and fruit length (cm). The highest positive direct effect on fruit yield per plant was exerted by number of fruit per plant followed by average fruit weight (g), pericarp thickness (cm), plant height (cm), number of locules per fruit, fruit circumference (cm) and harvest duration (days).
Description
Thesis