GENETIC VARIATION, CHARACTER ASSOCIATION AND PATH COEFFICIENT ANALYSIS IN BRINJAL (Solanum melongena L.) 2865
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2019-07
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Abstract
The study was conducted to assess genetic variation, character association and path coefficient analysis in brinjal (Solanum melongena L.) germplasm with a set of 180 genotypes and three checks in Augmented Randomized Block Design (ARBD) at Vegetable Research Station, Junagadh Agricultural University, Junagadh during late kharif 2017-18. The characters studied were days to 50% flowering, plant height (cm), plant spread EW (cm), plant spread NS (cm), days to first picking, days to last picking, number of branches per plant, fruit length (cm), fruit girth (cm), fruit weight (g), number of fruits per plant, total soluble solids (0Brix) and fruit yield per plant (kg), shoot borer infestation (%), fruit borer infestation (%) and little leaf incidence (%).
The analysis of variance revealed that mean square due to genotypes was significant for days to 50% flowering, plant height (cm), plant spread EW (cm), plant spread NS (cm), days to first picking, number of branches per plant, fruit length (cm), fruit girth (cm), fruit weight (g), number of fruits per plant, total soluble solids (%) and fruit yield per plant (kg). A wide range of variation was observed for important yield components.
Grouping of 180 genotypes with checks for fruit yield showed that among 183 genotypes evaluated, 5 were identified as higher fruit yielders; 159 had showed medium fruit yielding capacity and 19 genotypes were found as poor fruit yielders. In these case GP-127 was identified as the highest fruit yielder and the genotypes GP-196, GP-219, GP-25 and GP-126 had significantly higher fruit yield than better check GJLB-4. The genotypes GP-127, GP-219, GP-25, GP-196 and GP-94 were found to be more number of fruits per plant and the genotype GP-209 was found to have highest fruit weight. GP-81 and GP-178 were found to have longest fruit and maximum fruit girth, respectively.
The magnitude of phenotypic coefficient of variation was higher than corresponding genotypic coefficient of variation for all the characters studied. Maximum phenotypic coefficient of variation was observed for fruit yield per plant followed by number of fruits per plant. Plant height, fruit length, number of branches
Major Guide
Dr. M. A. Vaddoria
Name of Student
Sakriya Shveta Gokalbhai
per plant and total soluble solid had high heritability coupled with moderate genetic advance as per cent of mean.
Fruit yield per plant had significant and positive correlation with fruit length, plant height and number of fruits per plant at both genotypic and phenotypic levels, while significant and positive correlation only at phenotypic level with fruit girth, fruit weight and total soluble solid. Considerable amount of very high and high direct effects on fruit yield per plant were noted through number of fruits per plant and fruit weight, respectively; while positive and significant indirect effects was observed on fruit yield per plant via number of fruits per plant, plant height and fruit length.
On the basis of above studies, it can be concluded that the analysis of variance showed significant difference for most of the traits under study, indicated that there was scope for selection of promising genotypes from present germplasm for yield improvement. Due weightage should be given to fruit length, number of fruits per plant, plant height, fruit weight and fruit girth while imposing selection for genetic improvement of fruit yield in brinjal as there characters showed high to moderate heritability coupled with genetic gain and exerted strong association with desirable direct effects on fruit yield. The genotypes which had the highest value for the above mentioned characters can be further tested and utilized in the future breeding programme for development of high yielding varieties in brinjal