Abstract
Genetic variability, correlations and path coefficients were studied in desi (Indian) cotton (Gossypium arboreum L.) taking 20 phenotypically diverse genotypes along with two viz., PA- 402 and PA- 255, one NH-615 and one hybrid check NHH-44. A wide range of variation was found for almost all the characters. All the characters showed very small difference between genotypic coefficient of variation (GCV) and respective phenotypic coefficient of variation (PCV), indicated that all the characters were least affected by environment. The high heritability estimates coupled with high expected genetic advance were observed for number of monopodia plant-1, number of sympodia plant-1, plant height, number of bolls plant-1, average boll weight, lint yield plant-1, harvest index, oil content, seed cotton yield plant-1, 2.5% span length and micronaire value indicting the presence of additive gene action and phenotypic selection may be more fruitful. The correlation studies revolved positive and significant genotypic and phenotypic correlation for most of the characters. Considering the association and path analysis, lint yield plant-1, bolls plant-1, ginning outturn, lint index, total biomass, number of sympodia plant-1 and plant height had high positive effect on seed cotton yield plant-1. Key words: Genetic variability, correlation, path analysis, Gossypium arboreum.
Highlights
Full Length Research PaperCorrelation and path analysis among different traits in desi cotton (Gossypium arboreum L.)
Cotton (Gossypium spp.) is an important fibre and cash crop of the country which provides lint as raw material to the textile industry (Perchival and Kohel, 1990)
In the last few years there has been a significant reduction in area of G. arboreum cotton across the country and in Maharashtra because of lower productivity and inferior fibre properties as compared to tetraploid cotton in rain fed eco-system and non availability of Bt variety / hybrid
Summary
Correlation and path analysis among different traits in desi cotton (Gossypium arboreum L.). Correlations and path coefficients were studied in desi (Indian) cotton (Gossypium arboreum L.) taking 20 phenotypically diverse genotypes along with two viz., PA- 402 and PA- 255, one NH-615 and one hybrid check NHH-44. The high heritability estimates coupled with high expected genetic advance were observed for number of monopodia plant-1, number of sympodia plant-1, plant height, number of bolls plant-1, average boll weight, lint yield plant-1, harvest index, oil content, seed cotton yield plant-1, 2.5%. The correlation studies revolved positive and significant genotypic and phenotypic correlation for most of the characters. Considering the association and path analysis, lint yield plant-1, bolls plant-1, ginning outturn, lint index, total biomass, number of sympodia plant -1 and plant height had high positive effect on seed cotton yield plant -1
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