Correlation Studies on Yield and its Components in Inter Specific Cotton Hybrids (<i>G. hirsutum</i>x<i>G. barbadense</i>) for Developing Heterotic Box

Abstract

This present study was conducted with 92 F 1 cotton hybrids to provide information on interrelationships of seed cotton yield with some characters (plant height (cm), number of monopodial per plant, number of sympodia per plant, number of bolls per plant, mean boll weight (g), reproductive points on sympodia, sympodial length at 50 % plant height (cm), inter branch distance (cm), seed index (g), ginning outturn (%) and lint index (g) and to partition the observed correlations into their direct and indirect effects. In this experiment, 92 inter specific crosses ( G.hirsutumxG.barbadense ) along with three checks (MRC 6918 Bt check, RAHB 87 and DCH 32 non Bt checks) were subjected to LinexTester analysis (23 hirsutum testers and 4 barbadense lines). This experiment was laid out in Randomized Block Design (RBD) with two replications at University of Agricultural Sciences, Dharwad, Indis. Seed cotton yield exhibited significant positive correlation with mean boll weight (0.1123), ginning outturn (0.1339) and lint index (0.1020). Among these, seed cotton yield recorded significant positive strong correlation with ginning outturn.The direct effect on seed cotton yield was positive in plant height (0.0274), number of monopodia per plant (0.0480), number of sympodia per plant (0.0103), mean boll weight (0.1241), sympodial length at 50% plant height (0.0601) and lint index (0.6884), while the direct effect on seed cotton yield was negative in number of bolls per plant (-0.0024), reproductive points on sympodia (-0.0687), inter branch distance (-0.0571), seed index (-0.4620) and ginning outturn (-0.4280).