Genetic variability, heritability and correlation studies on onion (Allium cepa. L). genotypes

The present investigation on “Genetic Variability, Heritability and Correlation Studies on Onion (Allium cepa L.) Genotypes” was conducted in Allahabad, Uttar Pradesh, India on fourteen (14) genotypes of onion for selecting superior onion genotypes. The phenotypic coefficient of variation (PCV) was higher than the genotypic coefficient of variation (GCV) for all traits. Traits like plant height (0.928cm), leaf height (0.935cm), number of leaves (0.604), plant girth (0.795cm), leaf girth (0.857cm), biomass yield per plant (0.9761gm), bulb weight per plant (0.993gm), number of scales (0.823), bulb size in diameter (0.826mm) showed positive correlation with bulb yield per plot. The gross yield had strong positive correlation with bulb diameter. Higher genetic advance was found in high for biomass yield per plot(gm), bulb weight per plot (kg), where as high heritability and high genetic advance (as percent of mean) was recorded for the traits like biomass yield per plant (gm), bulb weight per plant (gm), bulb yield per plot (kg) and except plant height (cm), leaf height (cm), number of leaves, plant girth (cm), leaf girth (cm), bulb size in diameter (mm), number of scales.In view at the contribution of traits towards bulb yield, selection on basis of horticultural traits viz, bulb weight and bulb yield per plot would be a paying preposition in the genotypes included in the study.