The effect of irradiation and chemical mutagen (EMS) in creating desirable mutants for yield and its components in tuber, selfed potato seed was studied at Jalandhar. Both EMS and the low irradiaton dosages upto 8 Kr (Co 60 source) gave useful mutations and led to selection of clones with better tuber characters, higher yield and earliness in maturity. The spectrum of variabillty was higher for mutagen treated populations compared to untreated crossed and selfed populations. Irradiation beyond 8 Kr adversely affected the tuber yield, number and size of tubers. Irridiation of whole tubers slowed down sprouting during storage at room temperature.
