During the study of genetic activity of a number of chemical and physical mutagens about 1000 morphological mutants of different types were derived. Such mutagens as nitrosomethyl urea (NMU), nitrosoethyl urea (NEU), ethylenimine (EI), ethylenoxide (EO), nitrosodirnethyl urea (NDMU), dimethyl-sulfate (DMS), and gaunna rays were used. As the initial material for mutations induction, varieties \u27Lanka\u27, \u27Hybrid 89-10\u27, \u27Kirovogradskaya 4\u27, \u27VNEEMK 9186\u27 and \u27Peremoga\u27 were used
