Genetic variability, correlation and path analysis in onion seed crop

Genetic variability, interrelationship and path coefficients were studied in seed crop of 12 varieties of common onion. Moderate to high heritability, GCV and genetic gain were recorded for number of seed stalks/plant and flowers/umbel, seed yield, diameter of umbel and 1,000-seed weight, which could be improved by simple selection. Seed yield showed positive and significant genotypic and phenotypic correlation with number of seed stalks/plant, flowers/umbel, diameter of umbel and 1,000-seed weight. Path analysis showed that 1,000-seed weight and number of seed stalks/plant had high positive direct effect on seed yield and relatively high and positive indirect effect through each other on seed yield suggesting to give emphasis on such traits while imposing selection for amenability in seed yield of common onion.