Study on Proper Dose of ~(60)Co γ-ray for Sweet Potato Seeds Radiation Breeding

The two heredity types of sweet potato seeds were radiated with 60Co γ-ray.The results showed that the seeds germinating were delayed,but the rate of germination had no difference;Seedling leaf strain rate and the average plant single biomass increased as the dose increased.Two types of materials formed by the leaves of the strain rate and the average plant biomass with 300 Gy dose or above were 50%,lower than that without irradiation;the mutation dose of 400 Gy was suitable for the two types of sweet potato seeds.