Genetic diversity in asiatic cotton (Gossypium arboreum L.)
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Date
2012
Authors
Rumesh Ranjan
Journal Title
Journal ISSN
Volume Title
Publisher
CCSHAU
Abstract
The present study was undertaken to estimate the genetic diversity in Asiatic Cotton (G. arboreum L.). The material for the present investigation comprised of sixty genotypes of G. arboreum from different origin. The experimental material was grown at research area of Cotton Section, Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar, during Kharif 2011 in a randomized block design with three replications. The present investigation was done on assessment of variability, association analysis, path co-efficient analysis and assessment of genetic diversity. Genetic variability revealed that seed cotton yield per plant provided high estimates of genotypic and phenotypic coefficients of variation coupled with high heritability and expected genetic gain as a percent of mean, which provides better scope for improvement through direct selection. Association analysis revealed high positive significant correlation of seed cotton yield per plant with days to first flower, plant height, number of bolls per plant, number of monopods, boll weight and seed index. Path analysis revealed high positive and direct effect of days to first flower, number of bolls per plant, boll weight and lint index on seed cotton yield. The noticeable genetic diversity was observed for days to first flower, seed cotton yield per plant and number of monopods. All the sixty genotypes were grouped into eight clusters containing one to fourteen genotypes. The use genotypes from cluster VI, VIII and V would be useful to generate desirable genetic variability.
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Keywords
Organic compounds, Livestock, Biological phenomena, Proteins, Concentrates, Biological development, Sampling, Developmental stages, Fruits, Irrigation