MAFF caused mutation by 30 Kr gamma irradiation of dry seed of Takane nishiki, and Nagano Agricultural Experiment Station carried out the individual selection of the second generation.
農林水産省にてたかね錦の乾燥種子に30Krのガンマ線を照射して突然変異を起こさせ、長野県農事試験場にて第2世代の個体選抜を実施。