MORPHOLOGICAL AND MOLECULAR CHARACTERIZATION OF ORIENTAL PICKLING MELON (Cucumis melo var. conomon) GENOTYPES FOR PRODUCTIVITY TRAITS
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Date
2018-10-11
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K.R.C. COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
A field experiment was conducted during Kharif 2017-18 to study the
Morphological and molecular characterization of Oriental pickling melon (Cucumis
melo var. conomon) genotypes for productivity traits with 40 genotypes in randomized
block design with two replications. Analysis of variance had shown highly significant
(P=0.01) difference among genotypes for all twenty one parameters related to growth,
yield and quality traits except number of primary branches and 100 seed weight. The
estimate of PCV is higher than GCV in all the characters studied indicating influence of
environment of expression of characters. High GCV and PCV (>20%) were observed as
for nodes at first female flower appearance, number of male flowers, number of female
flowers, average fruit weight, number of fruits per vine, fruit yield per vine, Vitamin –C
and seed weight per fruit. High heritability (>60%) coupled with high GAM (>20%)
were observed for almost all the traits like number of nodes at 30 DAS, vine length at
30 and 60 DAS, number of male flowers, number of female flowers, sex ratio, fruit
length, fruit width, average fruit weight, number of fruits per vine, fruit yield per vine,
flesh thickness, seed cavity diameter, seed weight per fruit, Vitamin –C and TSS.
The traits like number of nodes at 60 DAS, average fruit weight, fruit length,
flesh thickness, seed cavity diameter and seed weight per fruit had significant and
positive correlation with fruit yield per vine with positive direct effect revealed by
correlation and path analysis studies. Direct selection of these traits is effective for
increasing the fruit yield per plant.
Mahalanobis D2 analysis indicated considerable diversity and 40 genotypes were
grouped into 7 clusters. The cluster V showed maximum intra cluster diversity. Inter
cluster distance revealed the maximum divergence between clusters IV and VI followed
by cluster III and VI.
Molecular characterization was carried out to know the genetic diversity using
PCR based SRAP markers. The similarity matrix coefficient ranged from 0 to 100 per
cent, suggesting a low to higher genetic variation within oriental pickling melon
genotypes. Cluster analysis of oriental pickling melon genotypes by employing
Jaccard’s Co-efficient method led to the grouping of the genotypes into two distinct
major clusters. In the present study it can be concluded that genotypes Manabagi-1, SS-
14, Local-5, Siddapur-1 and SS-16 recorded higher yield and found superior over all
other genotypes.
Description
TH-659
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