GENETIC DIVERGENCE IN BRINJAL (Solanum melongena L.)
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Date
2006
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Indira Gandhi Krishi Vishwavidyalaya Raipur
Abstract
The present investigation entitled “Genetic divergence in brinjal (Solanum
melongena L.)” was carried out at the Horticultural Research Farm, College of
Agriculture, Indira Gandhi Agricultural University, Raipur (Chhattisgarh) during
2005-06. The experimental material comprised of seventy five diverse genotypes of
brinjal. The material was grown in randomized block design with three replications.
Analysis of variance revealed that the mean sum of square due to genotypes
were significant for all the traits.
The high estimates of phenotypic coefficient of variation (PCV) coupled with
genotypic coefficient of variation (GCV) recorded in number of fruits per plant,
average fruit weight and fruit yield per plant. High heritability alongwith high genetic
advance as percentage of mean were recorded average fruit weight, number of fruits
per plant, plant spread, plant height and fruit girth. Whereas, fruit yield per plant had
significant positive correlation with number of fruits per plant and average fruit
weight at phenotypic and genotypic level.
In association analysis, fruit yield per plant exhibited significant and positive
association with number of fruits per plant and average fruit weight at phenotypic and
genotypic level. Number of fruits per plant and average fruit weight exhibited positive
direct effect on fruit yield per plant at phenotypic and genotypic level.
Genetic divergence analysis concluded that cluster VII and III had
highest number of genotypes. The maximum intra-cluster distance was obtained in
cluster VI, while inter-cluster distance was highest between cluster II and IV. Cluster
IV exhibited high cluster mean value for fruit length, fruit girth and average fruit
weight whereas, cluster VI showed high cluster mean value for plant height, plant
spread. While, lowest cluster mean value in cluster VII for number of fruits per plant,
days to 50 per cent flowering and days to first fruit set.
Divergence analysis provide a measurement of relative contribution of
different components on diversity. The cluster pattern of different genotypes
indicating no parallelism between geographical distribution and genetic diversity.
This suggested that, causes other than geographical suppression were also responsible
for diversity and characters like number of fruits per plant and fruit weight played an
important role in divergence and contributed maximum to genetic diversity in brinjal.
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94 p.