Genetic Variability, Heritability and Genetic Advance for Growth, Yield and Quality Parameters among Orange-Fleshed Sweet Potato [Ipomoea batatas (L.) Lam.] Genotypes

Author: Pallavi Wani, Ambresh and Shantappa T.

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Abstract

Sweet potato (Ipomoea batatas (L.) Lam.) is the one of most important food crop in the world. In other countries, sweet potato is used as a staple food crop because of it’s easy propagation, rich in nutrient content and high yield under varied climatic conditions. Orange fleshed sweet potato (OFSP), in particular case produces storage roots that are rich in β-carotene, a precursor of Vitamin A. Therefore, OFSP is a promising genotype to address the Vitamin A deficiency needs of women & children and to prevent malnutrition in poverty & tribal areas. The current study was undertaken to estimate the genetic variability, heritability and genetic advance for growth, yield and quality parameters among sixteen genotypes of orange fleshed sweet potato (Ipomoea batatas L. Lam.). In a randomized block design with three replications during rabi 2020-21 at Regional Horticultural Research and Extension centre (RHREC), (Kumbapur Form), Dharwad. Analysis of variance revealed that highly significant differences among the genotypes were observed for all the characters under study. The PCV was higher than GCV for all the characters. High (> 20 %) genotypic coefficient of variation (GCV) and phenotypic coefficient variation (PCV) were observed for number of leaves per vine at 60 and 120 DAP, leaf area at 60, 90 and 120 DAP, mean weight of tuber, yield of tuber per vine, yield of tuber per plot, yield of tuber per hectare. It indicates the existence of broad genetic base, which would be useful for further selection. High heritability (> 60 %) coupled with high genetic advance as per cent over mean (> 20 %) were recorded for the characters such as, vine length, number of leaves per vine, leaf area, inter- nodal length, total number of tubers per vine, girth of tuber, weight of tuber, yield of tuber per vine, yield of tuber per plot, yield of tuber per hectare, starch content, dry matter percentage and beta carotene content indicates the prevalence of additive gene action for these traits. Thus, there is ample scope for improving these characters through direct selection in crop improvement programme.

Keywords

Orange Fleshed Sweet Potato genotypes, Variability, Heritability, Genotypic coefficient, Phenotypic coefficient of variation

Conclusion

In conclusion, analysis of variance showed the presence of highly significant differences among the tested genotypes for the characters considered which indicates the existence of notable genetic variability among the genotypes for all the characters studied viz., vine length, number of branches per vine, number of leaves per vine, inter nodal length, leaf area, number of tuber per vine, tuber length, tuber girth, tuber weight, total tuber yield per vine, total tuber yield per plot, total yield per hectare, starch content, beta-carotene, and dry matter content indicates the presence of sufficient amount of variability in all the characters under study.

References

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How to cite this article

Pallavi Wani, Ambresh and Shantappa T. (2023). Genetic Variability, Heritability and Genetic Advance for Growth, Yield and Quality Parameters among Orange-Fleshed Sweet Potato [Ipomoea batatas (L.) Lam.] Genotypes. Biological Forum – An International Journal, 15(1): 405-411.