Studies on genetic variability in bitter gourd (Momordica charantia L.)
Loading...
Date
2020-11
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present investigation was carried out in Vegetable Research Center, G.B. Pant University of Agriculture and Technology Pantnagar, Udham Singh Nagar Uttarakhand during summer 2019. Twenty-four genotypes of bitter gourd were grown in randomized block design with three replication including one check (Pant Karela-1) to assess variability, heritability, genetic
advance, correlation coefficient, path coefficient and D2 analysis. Observations were recorded on thirteen quantitative characters viz., days to first male flower, days to first female flower, node number to first male flower, node number to first female flower, days to first harvest, number of fruits per plant, average fruit weight, average fruit length, average fruit diameter, vine length,
internodal length, fruit yield per plant and fruit yield per hectare. Analysis of variance revealed significant difference among all the genotypes for all the characters. On the basis of yield contributing characters the following genotypes were found superior than the check (Pant Karela-1) viz., PBIG-10 (172.64 q/ha), PBIG-22 (149 q/ha), PBIG-5 (142.92 q/ha), PBIG-9 (139.89 q/ha), PBIG-8 (134.9 q/ha). High heritability coupled with high genetic advance was recorded for number of fruit per plant, node number to first male flower, fruit yield per plant, fruit yield per hectare and average fruit weight, average fruit length, internodal length, vine length, node to first female flower indicating high opportunity for high selection response. Correlation coefficient studies indicated that Fruit yield per plant exhibit highly significant and positive correlation with number of fruit per plant, average fruit weight, average fruit diameter and vine length, while it showed highly significant and negative correlation with days to first male flower, days to first female flower, node number to first male flower, node number to first female flower and days to first harvest. Path coefficient analysis showed that the highest positive direct effect towards fruit yield per plant contributed by days to first harvest and average fruit weight followed by number of fruit per plant, internodal length, vine length and days to first male flower, whereas negative direct effects on fruit yield per plant was exhibited by days to first female flower, average fruit diameter, node number to first female flower, node number to first male flower, average fruit length. Clustering through D2 analysis revealed maximum inter-cluster distance between cluster III and cluster V (6767.90) followed by cluster II and cluster V (5218.09), thus the genotypes grouped
under cluster II, III and V may yield maximum heterosis upon hybridization and also create wide variability including transgressive segregants in selfed generation.