Exploring Variability, Heritability and Genetic Advances: Case study in Okra [Abelmoschus esculentus (L.) Moench] through Four Distinct Crosses in F2

Author: Parth Bagadiya, Priya Patel, C.G. Intwala, Jwala Pranati, Vidyut Balar

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Abstract

The goal of the current research was to investigate the effects of different quantitative traits on fruit yield in F2 populations of okra, including their genotypic and phenotypic coefficients, broad sense heritability, and genetic progress. This research material contained four crosses viz., first cross (Arka Abhay × NOL 17-6), second cross (Arka Anamika × NOL 17-6), third cross (Arka Abhay × NOL 18-02) and fourth cross (AOL 10-22 × NOL 18-02) together with their parents, F1 and the segregating F2 population. Due to the involvement of the segregating F2 generation, the crosses were examined in a non-replicated manner. Twelve characters with varying degrees of variability were observed. The number of branches per plant at final harvest, followed by fruit yield per plant, internodal length, fruits per plant, and plant height at final harvest, were found to have the highest magnitudes of PCV and GCV. The study encountered various difficulties, including the difficulty of reliably quantifying trait heritability due to environmental factors, as well as the complexity of analysing the genetic improvements. Despite these obstacles, the research gives vital insights into the variability and genetic potential of Okra, helping to develop breeding programmes for this crop. Most of the traits in the four crossings showed substantial genetic advancement along with high heritability.

Keywords

Genetic advance, Heritability, GCV, PCV, Okra, Variability

Conclusion

The results of the current study showed that the PCV was larger than the matching GCV for all of the characteristics, suggesting that there may be some degree of genotype-environment interaction. Strong genetic advance as a percentage of mean and high heritability estimations gives us idea about the governance of additive genes for the characters. It also suggests selection would be rewarding for high yielding genotypes as those characters mentioned above were governed by additive genes. Thus, we should focus on those yield attributing characters which is giving higher response of high estimates of heritability along with high genetic advance.

References

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How to cite this article

Parth Bagadiya, Priya Patel, C.G. Intwala, Jwala Pranati and Vidyut Balar (2023). Exploring Variability, Heritability and Genetic Advances: Case study in Okra [Abelmoschus esculentus (L.) Moench] through Four Distinct Crosses in F2. Biological Forum – An International Journal, 15(5): 765-772.