Genetic variability, correlation and path analysis in f4 generation of ridge gourd (Luffa acutangula (Roxb) L.)

Abstract

The present investigation on genetic variability, correlation and path analysis in F4 generation of ridge gourd was carried out to develop medium size, high yielding and good quality variety for Madurai condition. The selected genotypes from two crosses viz., Virudhunagar local x Periyakottai local (L3xT1) and Virudhunagar local x Alathur local (L3xT2) of ridge gourd along with their parents were evaluated in a randomized block design (RBD) with two replications. The results revealed that both crosses showed low PCV, GCV coupled with high heritability and high genetic advance for the character notes to first male flower. Whereas low PCV, GCV coupled with low heritability and low genetic advance for the character fruit diameter. This indicates selection for these traits will be effective for improving these traits in further generation. Regarding correlation studies, cross L3xT1 the trait fruit yield was found to be significantly and positively correlated with node to first male, node to first female flower, fruit weight, fruit length, number of fruits per plant and flesh thickness. Whereas cross L3xT2,fruit yield was found to be significantly and positively correlated with node to first male, node to first female flower, fruit weight, fruit diameter and flesh thickness. Path coefficient analysis showed that fruit length in L3xT1cross has contributed the maximum positive direct effect. Whereas fruit diameter in L3xT2 cross contributed the maximum positive direct effect.