Abstract:

The seeds of Paeonia suffruticosa were radiated by the different dosages of 60Co-γ ray, and the seed germination rate and seedling growth were observed, which were to lucubrate radioactive breeding of Paeonia suffruticosa, which were to resolve radiation dosages of Paeonia suffruticosa, and which were to select choiceness and new variety of Paeonia suffruticosa having economy value. The results showed that the seed germination rate increased along with the increase of radiation dosage at 8.73-17.46 Gy, and 17.46 Gy was tiptop, but the seed germination rate decreased at 17.46-52.38 Gy. The emergence rate, seedling height, and root length of seeds which were radiated were higher than CK. The emergence rate was 92.4%, and seedling height was 6.65 cm when radiation dosage was 17.46 Gy. Radiation could promote seedling growth and could make the germination rate increased. 17.46 Gy was suitable for the peony seeds based on the influence of germination rate and seedling growth. There was no obvious effect on the root length by the dosage of 60Co-γ ray.