International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 3
First page : (403) Last page : (406)
Article doi: http://dx.doi.org/10.18782/2320-7051.5053
Genetic Variability and Character Association in Intra-Hirsutum Hybrids
P. K. Prem Meena* and Harphool Meena
Agriculture Research Station, Kota (Agriculture University Kota, Rajasthan-324 001)
*Corresponding Author E-mail: pkp_meena@rediffmail.com
Received: 12.06.2017 | Revised: 21.06.2017 | Accepted: 22.06.2017
ABSTRACT
Variability and correlations were studied in 24 cotton hybrids of Gossypium hirsutum of diverse origin. Significant difference among the hybrids for all the seven characters was revealed. The components viz., phenotypic (σ2p), genotypic (σ2g) and environmental (σ2e) variances were used for estimation of phenotypic and genotypic coefficient of variations. The phenotypic coefficient of variation (PCV), which measures the total variation, was found to be greater than genotypic coefficient of variation (GCV). Moderate to high estimates of heritability along with high genetic advance were noticed for lint index, seed index, number of bolls/ plant, seed cotton yield/plot and lint yield, indicating the presence of additive gene action in the expression of these traits. Genotypic and phenotypic correlation showed that seed cotton yield/plot had significant positive association with ginning outturn (%) at genotypic level, while lint index, seed index and number of bolls/plant showed significant positive association with seed cotton yield at genotypic and phenotypic levels. The positive significant correlation was observed for both the characters viz., seed index (g) and lint index (g) with number of bolls/plant at genotypic and phenotypic levels. Thus, for increasing seed cotton yield in cotton, due emphasis should be given to ginning outturn (%), lint index (g), seed index (g) and number of bolls/plant. All the characters which had high heritability and highly significant positive association with seed cotton yield can be increased through selection in cotton.
Key words: Cotton, variability, PCV and GCV, Genetic advance, heritability, correlation.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Meena, P.K.P. and Meena, H., Genetic Variability and Character Association in Intra-Hirsutum Hybrids, Int. J. Pure App. Biosci.5(3): 403-406 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5053
