DIVERGENCE STUDY IN BRINJAL (Solanum melongena L.)
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Date
2021
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DRPCAU, PUSA
Abstract
The present investigation entitled “Divergence Study in Brinjal (Solanum melongena L.)” was conducted at “Vegetable Research Farm, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar”. The experimental material consists of twenty-two genotypes of brinjal including Pant Rituraj as check and studied for eighteen quantitative traits along with five morphological traits in randomized block design (RBD) consist of three replications during the late kharif season of 2020.
The observations were recorded for eighteen quantitative traits viz. “plant height (cm), number of primary branches per plant, days to 50 % flowering (days), days to first harvest (days), fruit length (cm), fruit width (cm), fruit pedicle length (cm), number of fruit per plant (cm), average fruit weight (g), marketable fruit yield per plant (kg), unmarketable fruit yield per plant (kg), total soluble solid (degree Brix), long style flower (%), medium style flower (%), short style flower (%), pseudo-short style flower (%), shoot & fruit borer infestation (%), total fruit yield per plant (kg)” and five morphological traits namely “plant growth habit, flower colour, fruiting habit, fruit colour and fruit shape ”. All the eighteen quantitave traits were analyzed for “analysis of variance, genotypic and phenotypic variance, genotypic and
Dr. RAJENDRA PRASAD CENTRAL AGRICULTURAL UNIVERSITY, PUSA, SAMASTIPUR, BIHAR-848125
phenotypic coefficient of variation, heritability, genetic advance,genetic advance as percent of mean, correlation analysis, path analysis and genetic divergence” to study the nature and the magnitude of variability and diversity present among these genotypes.
The analysis of variance had significant variation among all the eighteen characters studied. In common, the values recorded for phenotypic coefficient of variation was higher than the values observed for the genotypic coefficient of variation with very narrow gap between these two parameters. The high genetic heritability coupled with high genetic advance was recorded for maximum number of traits namely “fruit width, fruit length, pseudo-short style flower, fruit pedicle length, short style flower, average fruit weight, unmarketable fruit yield/ plant, marketable fruit yield per plant, number of primary branches per plant, shoot & fruit borer infestation, number of fruit per plant medium style flower & total fruit yield/plant” which implies that selection for these traits is favorable.
The GCV was greater than the PCV. The total fruit yield per plant was positively and significantly associated with “number of fruit per plant, average fruit weight per plant, marketable fruit yield per plant and un-marketable fruit yield per plant”.
Maximum inter-cluster distance was exhibited between Cluster V and VI followed by Cluster IV & V, Cluster III & IV, Cluster III and IV & Cluster III and VI indicating the chances of getting high yielding recombinants would be better if the crosses are made among the genotypes of these groups. The lowest inter-cluster distance was recorded between the Clusters I and III. The highest contribution towards genetic divergence was recorded by “total fruit yield per plant followed by fruit width, medium style flower, number of fruits per plant, shoot and fruit borer infestation, unmarketable fruit yield per plant, short style flower, fruit pedicle length, fruit length, average fruit weight, marketable fruit yield per plant, total soluble solid and days to 50% flowering”, Hence, improvement of these traits can be possible.