Mutagenic Effects Of Different Doses Of (12)~C Heavy Ion Radiation On Oat

The dry oats’ seeds of Dingyou-7、Dingyou-4、Bayou-8and Huazao-2were irradiated by12C heavy ion irradiation set with doses of0、50、100and150Gy and to observe the mutagenic effect of different doses radiation on morphology, aboveground dry matter accumulation, photosynthetic, physiology, and yield for four varieties oats. Hoping to reach the purpose of this paper was that the radiation doses range that was suitable for different oats varieties were preliminarily selected, and to identify the priority order of planting for four oat varieties, so the theoretical foundation for the application of heavy ion radiation in oats mutation breeding was provided. The results show that:1. The mutagenic effect of12C heavy ion irradiation on different oats was depended on crop variety, and its complex effect was mainly embodied in two aspects:The different doses of radiation had a different mutagenic effect on one oat and the same doses of radiation had a different radiation response to the different oats varieties, such as form, aboveground dry matter accumulation, photosynthetic, physiology, and yield.2. Some relatively regular changes were found among the complex radiation effect. The accumulation of MDA for all kinds of oats were increased under the12C heavy ion irradiation with doses of0、50、00and150Gy, in turn it demonstrated that as an adversity stress12C heavy ion irradiation had a damage impact on plasmalemma of oats. The other indexs include chlorophyll, grain weight per panicle and thousand seed weight also had a similar phenomenon.3. The grain yield of Dingyou-7, Dingyou-4and Huazao-2were increased when using the12C heavy ion irradiation with lower dose of50Gy, and the selection of priorities for oats varieties were Dingyou-4> Dingyou-7>Huazao-2.4. The straw yield of Dingyou-7and Bayou-8were increased when using the12C heavy ion irradiation of higher dose of150Gy, and the selection of priorities for oats varieties were Bayou-8>Dingyou-7. The straw yield of Dingyou-4was increased under the12C heavy ion irradiation with doses of50Gy.In conclusion, to choose a suitable dose range of radiation, the crop strains, variety and the main goal of variety breeding were needed to consider when applying this way of12C heavy ion irradiation on variety breeding, according to the complexity of12C heavy ion irradiation on variety breeding.