Estimation of Gene Effect in Ridge Gourd (Luffa acutangula L. Ruxb.) Using Six Generation Mean Analysis

Abstract

The present study was determined the scaling test and magnitude of gene effect in ridge gourd using six-generation mean analysis. Three promising F1 hybrids, namely cross-I P1 x P2 (Arka sumeet x Konkan harita), cross-II P1 x P3 (Arka sumeet x Jaipur long), and cross-III P4 x P5 (Saloni-5 x NRG-9), as well as their F2 and back crosses, were studied in two replications with randomized block design during kharif, 2021. With the exception of the cross where P1x P3 was the number of pickings, in the chi-square joint scaling test three crosses were significantly, and all three crosses carried the scaling test with significance. Additive, dominance, and epistasis were the three gene action types found in all three crosses, with the exception of additive x dominance (j), which included the number of days taken the first female flower appeared, number of pickings (cross-I P1xP2, cross-II P1xP3 and cross III P4xP5), the number of days to the first picking (cross-I P1xP2 and cross- III P4xP5), and the number of days taken last picking (cross-I P1xP2 and cross- III P4xP5). For all traits in three crosses, duplicate epistasis was observed.