K. Keerthivarman, S. Subhashini, Banoth Madhu, K. Aravind, G Ariharasutharsan, M. Akilan
The F2 population of the crosses MCU 5 × KC 3 and MCU 5 × NDLH 1755 were taken for the investigation of variability and heritability studies to understand the gene action contributing to the each and every trait taken under study. The phenotypic coefficient of variation (PCV) in both the crosses were found to have environmental influence as it was greater than the genotypic coefficient of variation (GCV) for all the traits under study. The studies of heritability and genetic advance as percent of mean helps us to identify the trait is additive or epistatic in nature, therefore undergo suitable breeding programmes for the improvement of the population. Among all the characters taken under study, the seed cotton yield per plant alone was found to have additive gene action with high heritability and high genetic advance as percent of mean hence could be involved in direct selection as it is the major trait for improvement of the population of that trait in the cross MCU 5 × KC 3. The cross MCU 5 × NDLH 1755 the traits namely, number of sympodial branches per plant, number of bolls per plant and seed cotton yield per plant had high heritability and high genetic advance as percent of mean hence additive in nature hence could be taken for direct selection for the improvement of the population. Other traits in both the crosses had non- additive or epistatic gene action with either high heritability with medium or low genetic advance as percent of mean which could be improved through heterosis breeding programmes. Since traits are contributed by complex gene action.
Variability, Heritability, GCV, PCV, G. hirsutum L. and F2 population
Cite this paper
K. Keerthivarman, S. Subhashini, Banoth Madhu, K. Aravind, G Ariharasutharsan, M. Akilan. (2023) Assessment of Genetic Variability Parameters for Yield and Fibre Quality Traits of Cotton (Gossypium Hirsutum L.) in F2 Population. International Journal of Agricultural Science, 8, 265-271