GENETIC VARIABILITY FOR HORTICULTURAL AND NUTRITIONAL TRAITS IN ONION (ALLIUM CEPA L.)S.M. Kale, P.S. Ajjappalavara, Sachin Utagi, H.B. Patil and K.M. Muthal
An experiment was conducted during 2012-13 to study the genetic variability, correlation and path analysis in 44 onion genotypes for growth, yield, quality and nutrient composition related traits. The range of variation was maximum for bulb yield/plot (2.09 to 7.15 kg) followed by average bulb weight (29.86 to 35.18 g) and TSS (8 to 22.6 0Brix). Genotypic coefficient of variation and phenotypic coefficient of variation were high for magnesium and bolting percent. Heritability in broad sense ranged from 27.90 (days to 50 % neck fall) to 99.18 (TSS). The genetic advance as percentage of mean varied from 3.44 (days to 50% neck fall) to 109.62 (magnesium mg/100 g). The character association studies revealed that bulb yield showed positive and significant correlation with growth related as well as bulb related traits. Results of path analysis revealed that plant height, number of leaves per plant, leaf area, bulb polar bulb diameter, neck thickness, pyruvic acid, calcium, fibre, vitamin C and average bulb weight exhibited desirable positive and high direct effect on bulb yield.
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