Correlation and Path Coefficient Analysis between Seed Cotton Yield and its Attributing Characters in Intra Hirsutum Cotton Hybrids

Abstract

This study was carried out to determine direct and indirect effects of some characters ( Days to 50 per cent flowering, plant height (cm), Number of monopodial branches per plant, Number of Sympodia per plant, Number of bolls per plant, Mean boll weight (g), Ginning percentage, Seed index (g) and Lint index (g)) on seed cotton yield. The experiment was carried out with 48 F 1 hybrids have produced through Line 800x600 × Normal 0 7.8 pt 0 2 false false false EN-US ZH-CN X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:Table Normal; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:Times New Roman,serif;} Tester mating design using 6 hirsutum non Bt lines (RAH 318, RAH 243, RAH 128, RAH 146, RAH 97 and RAH 124) and 8 hirsutum non Bt testers ( SC 14, SC 18, SC 7, SC 68, RGR 32, RGR 24, RGR 58 and RGR 37)were sown in a randomized complete block design (RCBD) with two replications at the Agricultural Research Station, Bavikere, UAS, Bangalore. Seed cotton yield per plant was significantly and positively genotypic correlation with days to 50 per cent flowering (0.359), plant height (0.443), bolls per plant (0.590), mean boll weight (0.422) and ginning per cent (0.379) but significantly and negatively correlated with seed index at genotypic level. The phenotypic correlation values also revealed that seed cotton yield per plant had highly significant and positive phenotypic correlation with bolls per plant (0.624), significantly and positively phenotypic correlation found between seed cotton yield per plant and mean boll weight (0.327). Path coefficients were computed to estimate the contribution of individual characters to yield in cotton. The path analysis indicated high positive direct effect of monopodia per plant (0.619) and mean boll weight (0.321) on seed cotton yield. Sympodia per plant exhibited high positive indirect effect on seed cotton yield via seed index (0.374), the result of this mean boll weight had high positive correlation with seed cotton yield and sympodia per plant recorded low positive correlation with seed cotton yield. Key words: Yield, Path Coefficient, Correlation, Attributing Characters, Cotton