Correlation and Path Coefficient Studies in Onion

Eight inbred lines of onion with their 28 Fi hybrids derived from a diallel cross (excluding reciprocals) were studied for correlation and path analysis. There was a positive and highly significant phenotypic correlation between yield and its main contributing characters viz., bulb weight, bulb diameters (both horizontal and vertical) and plant height. Path coefficient analysis revealed that the bulb weight had the highest direct effects on the yield followed by bulb diameter (horizontal). The selection on the basis of three characters viz, bulb weight, bulb diameter (horizontal) and total soluble solids (T.S S.) will be most useful for the breeder to increase the yield and improve the dehydration and storage qualities in onion.