Assessment of Genetic Variability, Heritability and Genetic Advance in Onion (Alllium cepa L.)

Author: N.V. Mane, V.S. Kale and P.J. Karande

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Abstract

This study aimed to evaluate the growth, yield and yield attributing traits of twenty-three genotypes of onion at the Instructional Farm, Department of Vegetable Science, Dr. P.D.K.V., Akola, during the year 2018-19 in the rabi season the experiment was conducted in a randomized block design (RBD) with three replications for each genotype. The observations were recorded for number of leaves/plants, plant height, leaf length, leaf area, neck thickness, bulb diameter, bulb weight, yield/plot, TSS and yield/ha. The results revealed that highly significant difference among the genotypes for all the traits studied. The phenotypic coefficient of variation was higher than the corresponding genotypic coefficient of variation for all the traits. The result revealed that the PCV and GCV mean ranged for leaf area (4.590 cm2, 2.571 cm2) to yield per plot (30.906 kg, 29.858 kg), respectively. The highest genotypic coefficient of variation as well as phenotypic coefficient of variation was observed for the trait yield per plot and yield per hectare. Almost all characters exhibited high heritability (31.364% to 94.071%), genetic advance over mean was ranged from 2.966 to 59.442 for all the characters

Keywords

Onion, Genetic advance, Genotypes, Heritability, Variability

Conclusion

The phenotypic coefficient of variation in general was greater in magnitude than the corresponding genotypic ones. The differences between PCV and GCV for many characters such as no. of leaves, height of plant, leaf length, leaf area, neck thickness, bulb diameter, bulb weight, yield per plot, TSS were found minimum indicating less environmental effect. High values of GCV and heritability estimates supplemented with greater genetic gains are also indicative of additive gene effects regulating the inheritance of such traits therefore, these characters reflect the greater selective value and offer ample scope for selection and phenotypic coefficient of variation was lessened under the influence of environment

References

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How to cite this article

N.V. Mane, V.S. Kale and P.J. Karande (2024). Assessment of Genetic Variability, Heritability and Genetic Advance in Onion (Alllium cepa L.). Biological Forum – An International Journal, 16(3): 63-66.