Estimates of variability, Heritability and Genetic Advance for Yield and Quality Traits in Vegetable Cowpea (Vigna unguiculata sub sp. sesquipedalis (L.) Verdcourt)

Author: Airina C.K. and Sarada S.

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Abstract

The phenotypic coefficient of variation (PCV), genotypic coefficient of variation (GCV), heritability and genetic advance were estimated for the 19 quantitative characters in fifteen crosses of vegetable cowpea in an experiment conducted at the Department of Vegetable Science, College of Agriculture, Vellayani in 2022-23. The PCV values for all the characters were found to be higher than the GCV values but in smaller magnitude, which implied a lesser influence of environmental factors for these characters. The Highest PCV and GCV values were observed for pod weight (52.80 and 51.60, respectively), followed by pods per plant (43.25 and 32.88, respectively). The highest values for heritability and genetic advance were recorded for pod weight (95.80 and 104.22, respectively). High heritability estimates coupled with genetic advance for characters such as vine length, terminal leaf width, lateral leaf width, pod length, pod weight, number of seeds per pod, 100 seed weight, protein content and keeping quality suggest the relevance of additive gene action in the improvement of these traits.

Keywords

Yard long bean, variability, GCV, PCV, heritability, genetic advance

Conclusion

High PCV, GCV, heritability and genetic advance were observed for lateral leaf width, pod length and pod weight. The magnitude of PCV and GCV were highest for pod weight, while heritability estimates were highest for pod length and genetic advance for pods per plant. High estimates of heritability combined with genetic advance for traits, such as protein content, keeping quality, number of seeds per pod, 100 seed weight, vine length, terminal leaf width, lateral leaf width, pod length, pod weight, and pods per plant imply the importance of additive gene action in improving these traits. For characters such as days to flowering and days to harvest, though high heritability is recorded, genetic advance is moderate, which suggests the presence of non-additive gene action and the scope of improvement through suitable hybridization programmes.

References

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How to cite this article

Airina C.K. and Sarada S. (2024). Estimates of variability, Heritability and Genetic Advance for Yield and Quality Traits in Vegetable Cowpea (Vigna unguiculata sub sp. sesquipedalis (L.) Verdcourt). Biological Forum – An International Journal, 16(1): 59-63.