Vol. 13 No. 3
Genetic variability, heritability and genetic advance studies in onion (Allium cepa L.)
Author(s): P. P Mohapatra, S. Bhoi, T. K. Maity, A. Majhi and J. Tarafdar
Abstract: Sixteen onion genotypes were evaluated for nine quantitative characters. Difference between GCV and PCV were found minimum for plant height, polar diameter, equatorial diameter, total yield, whereas, difference between GCV and PCV was observed high for the other traits like, bolting percentage, double bulb percentage, split bulb percentage, neck thickness, number of leaves. The narrow difference between GCV and PCV indicated that these characters were least influenced by the environment. On the other hand, the wide difference between GCV and PCV designated that environment had major role for phenotypic expression of these traits. High heritability accompanied with high genetic advance was noticed for all characters except found for boliting per cent, number of leaves, split bulb percentage, neck thickness, showed low heritability with low genetic advance indicating that simple selection may be effective to fix and improve such traits. As a result, selection of these this character was not to be effective. But, on the contrary, moderate to high heritability concomitant with high genetic advance reflected for the characters like plant height, polar diameter, equatorial diameter, total yield.
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