论文部分内容阅读
用不同能量、不同注量的MEV级12C离子束辐照玉米和冬小麦干种子,用MEV级16O离子束辐照冬小麦干种子,研究其对M1代幼苗生长的影响和M2代的诱变效应。结果表明,在一定离子通量(注量)下,所用注入能量范围内的离子束对幼苗造成的辐射损伤随辐射能量的增加而增大。用12~16MEV/U的12C离子束辐照玉米和8MEV/U16O离子束辐照小麦,对M1代幼苗造成的辐射损伤比贯穿能量(45MEV/U)下的辐射损伤明显加重。12C离子束可以诱发玉米产生植株矮化、雄性不育、白化苗、多穗型等多种类型变异,多数白化苗能够转绿并正常结实。12C和16O离子束诱发冬小麦产生的早熟和矮杆突变最多,12C辐照冬小麦原冬6产生的早熟突变在辐照能量为8MEV/U、离子通量为80×107/CM2时高达10.7%;矮秆突变在辐照能量为8MEV/U、离子通量为120×107/CM2时高达7.59%。品种间的变异频率也存在差异。
The seeds of corn and winter wheat were irradiated by MEV grade 12C ion beams with different energy and different fluence. The dry seeds of winter wheat were irradiated with MEV grade 16O ion beam to study their effects on the growth of M1 seedlings and the mutagenic effects of M2 generation. The results show that under a certain ion flux (fluence), the irradiation damage caused by the ion beam in the injected energy range to seedlings increases with the increase of radiant energy. Irradiation of wheat on M1 seedlings was significantly more severe than that of radiation at the penetration energy (45 MEV / U), when irradiated with 12-16 MEV / U 12C ion beam and 8MEV / U16O ion beam. 12C ion beam can induce maize plant dwarfing, male sterility, albino seedling, panicle and other types of variation, most of the albino seedlings turn green and normal and strong. Early maturing and dwarfing mutants were induced by 12C and 16O ion beam in winter wheat. The early maturing mutation of Haidong6 produced by 12C irradiation was as high as 10.7% when the irradiation energy was 8 MEV / U and the ion flux was 80 × 107 / CM2. The dwarf mutation was as high as 7.59% at an irradiation energy of 8 MEV / U and an ion flux of 120 × 10 7 / cm 2. The frequency of variation among varieties is also different.