EVALUATION OF ADVANCED LINES OF OKRA [Abelmoschus esculentus (L.) Moench] FOR PRODUCTIVITY AND QUALITY TRAITS
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Date
2016-12
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University of Horticultural Sciences, Bagalkot
Abstract
Forty seven advanced lines of okra along with check Arka Anamika were
evaluated in randomized block design with two replications at Department of
Biotechnology and crop improvement, College of Horticulture, Bagalkot (Haveli),
during kharif season 2016 and assessed for their genetic variability, heritability and
genetic advance for thirty two parameters concerned with growth, yield and quality.
Analysis of variance revealed highly significant differences among the advanced lines
for all the traits studied. The genotypic and phenotypic coefficient of variability, high
heritability coupled with high genetic advance over mean was observed for plant
height (45 DAS and 90 DAS), number of leaves per plant (45 DAS and 90 DAS),
internodal length (45 DAS and 90 DAS), number of nodes per plant, number of
branches per plant (45 DAS and 90 DAS), leaf area, first flowering node, total
number of fruits per plant, total fruit yield per plant, fruit diameter, marketable yield
per plant, flesh thickness, crude fiber, fruit firmness, vitamin-C, phenol, rind
thickness, number of seeds per fruit, seed yield per fruit, 100-seed eight, days to
50 per cent flowering, average fruit weight, fruit length, moisture, total reducing
sugar, indicating predominant additive gene action offering scope for improvement of
these characters through direct selection.
Correlation studies revealed significant and positive association of fruit yield
per plant with plant height (45 DAS and 90 DAS), number of leaves per plant
(45 DAS and 90 DAS), number of branches per plant (45 DAS and 90 DAS),
internodal length (90 DAS), first flowering node, number of nodes per plant, number
of fruits per plant, average fruit weight, fruit length, fruit diameter, days to 50 per cent
flowering. Path analysis studies revealed high direct effect of number of fruits per
plant, average fruit weight on total yield per plant. Mahalanobi’s D2 analysis grouped
the 47 advanced lines of okra and including Arka Anamika into eight clusters.
The maximum difference among the genotypes within the same cluster was shown by
cluster I. Cluster VIII and I showed maximum inter cluster distance. Fruit diameter
contributed maximum (37.77 %) to the genetic diversity followed by leaf area (30.59
%), marketable yield per plant (30.41%). In the present investigation, the advanced
lines viz., UHSB-ADL-15, UHSB-ADL-26, UHSB-ADL-27, UHSB-ADL-32,
UHSB-ADL-34, UHSB-ADL-39, UHSB-ADL-43 recorded higher fruit yield per
plant. The promising genotypes can be further tested for their performance.
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