A study was conducted on morphological and cytogenetic changes induced by gamma rays, EB, NMU and SA on 3 indica cvs of rice viz., Aditya, Annada and IR-36. The main objectives were to assess the relative effectiveness and efficiency of the mutagens employed and to evaluate the mutational response of cvs for induction of viable morphological, cytogenetic and chlorophyll mutants. Seedling and mature plant characters, types of cytological aberrations in M1, frequency and spectrum of chlorophyll and other morphological mutants in M2 were studied. Cytological aberrations were detected in...