Division of Genetics, Indian Agricultural Research Institute, Delhi-12
*Present Address: University of Agricultural Sciences, Hebbal, Bangalore 24.
Acute and chronic gamma irradiations produced more or less the same type of mutations in bread wheat (N.P. 868) but the mutation frequency was considerably higher (49 per cent.) in chronic irradiated plants (10.7 kr.) as compared to acute treatment with 30 kr.
