BREEDING FOR THE DEVELOPMENT OF ONION HYBRIDS IN INDIA: PROBLEMS AND PROSPECTS
Male sterility from indigenous source was found in cultivar Nasik White Globe at the Indian Institute of Horticultural Research, Bangalore. Further studies indicated that a strong cytoplasmic factor was responsible for male sterility in this cultivar. The male sterility has been successfully transferred to six different genotypes which are now being used for exploiting heterosis. Out of 75 test crosses evaluated for bulb yield and quality, two were found promising. These two promising hybrids, Hybrid-1 (MS65 x SI 13–1–1–1) and Hybrid-5 (MS48 x SI 14–1–1–1), have been identified for commercial use, with high bulb yields (45–50 t/ha) and good-quality bulbs.