Genetic Variability Studies for Seed Cotton Yield and Other Yield Attributes in the UASD Bt-78 Event Based F2 Population of Cotton (G. hirsutum L.)
Year: 2025
Type: article
Abstract: UASD cry-1Ac Bt-cotton event-78 is a novel event developed under the background of G. hirsutum L., RAH-100. In the present study early segregating F2 population derived by selfing of F1 of the cross, UASD Bt-78 × DHS-29 was evaluated for estimation of genetic variability for seed cotton yield and other yield attributes, during the kharif-2021 at Agricultural Research Station, Dharwad. For most of the traits, a wide range was observed in the segregating population, likewise analysis of variance also showed the presence of significant difference for the considered traits within the F2 population and in between checks and F2 segregants. Negatively skewed distribution was observed for the traits like seed cotton yield, plant height, average boll weight, number of bolls/plants and GOT, suggesting that mild selection is sufficient for improvement. All the yield attributes showed a leptokurtic distribution, suggesting that fewer genes control them. In the segregating population, moderate to higher to levels of variability (GCV and PCV) in association with higher per cent of heritability and genetic advance as a per cent of mean was recorded for most important traits such as seed cotton yield/plant, lint yield/plant, number of bolls/plant, number of sympodia/plant, plant height, number of monopodia/plant and sympodial length/plant, emphasising that simple selection in subsequent generations for improving these traits, as these traits are controlled by additive gene actions.
Authors: Pushpa M. Aralikatti, Manjula S. Maralappanavar, Basavaraj D. Biradar, Siddharuda B. Patil, S. Md. Akbar
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W4414829296