Dihaploid and doubled rapeseed shoots were irradiated during micropropagation with 20-100 Gy of gamma rays and 10.00-23.33 Gy of fast neutrons. The following indices of shoot radiosensitivity were used: shoot survival, proportion or shoots without ability to propagate, propagation coefficient and proportion of small shoots It was found that the gamma ray dose should not exceed 60 Gy and that of fast neutrons — 20 Gy. The effects of the genotype, number of chromosomes and split dose were studied.