Studies on multiple correlation between bulb yield, growth and yield attributes in different genotypes of onion (Allium cepa L.) under irrigated conditions

Thirteen onion genotypes having distinct diversity in morphology and performance were evaluated in randomized block design with three replications in medium black soils at the Agricultural Research Station, Hiriyur under irrigated conditions both in kharif and rabi seaons. Eleven morphological quantitative characters were measured on randomly selected plants at harvest. The data were subjected to a standard statistical procedure to study the correlation between the bulb yield and vegetative characters and yield components. The values of correlation coefficients (r) were calculated and tested for their significance. The results revealed that plant height, number of leaves per plant, neck thickness, number of rings per bulb, ring thickness, weight of bulb and volume of bulb had positive and significant correlation with the bulb yield. Thus, the above characters deserve adequate consideration for better production of bulb yield.