Year: 2018 | Month: December | Volume 11 | Issue 6
Genetic variability, Heritability and Correlation Analysis in F2 Populations of Ratoon Upland Cotton Hybrids
DOI:10.30954/0974-1712.12.2018.2
Abstract:
The success of crop improvement programs depends on variability and heritability of desirable traits. An investigation was carried out to assess the extent of variability generated by hybridization to estimate the heritability and genetic advance as percent of mean and correlation analysis for seed cotton yield and yield component traits and fibre quality traits in F2 main crop and F2 ratoon crop generations of 32 novel upland cotton hybrids. The segregating population was evaluated for fifteen traits. It was found that the F2 main crop and F2 ratoon crop populations are superior to the parents and expressed highly significant differences for all the traits. The high phenotypic coefficient of variation and genotypic coefficient of variation were recorded for traits number of monopodial branches per plant, number of bolls per plant and seed cotton yield per plant. High heritability coupled with high genetic advances was recorded for traits number of monopodial branches per plant, number of bolls per plant, lint index, seed cotton yield per plant and fibre fineness. As results of the correlation analysis, seed cotton yield was significantly positively associated with days to first flowering, number of sympodial branches per plant, number of bolls per plant, boll weight, lint index, seed index, ginning out turn and fibre fineness. Results further revealed that F2 main crop and F2 ratoon crop generations with larger genetic potential, moderate to high heritability and positive association between yield and yield contributing traits and fibre quality traits could guide intensive selection for improvement in segregating populations.
© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
Print This Article Email This Article to Your Friend
