【摘要】 用60～100 keV氮离子和75 keV碳离子的不同剂量注入4个甜菊品种的干种子,研究其对产量和糖甙含量的影响。结果表明,不同能量和剂量的氮离子注入济宁种后,使甜菊的糖甙产量和成分发生变化,以75 keV,5×10¹⁴N⁺/cm²的氮离子注入最佳,其总甙和优质糖甙（R-A）分别比对照提高4.74％和14.08％。碳离子对甜菊糖甙成分的影响大于氮离子。离子注入杂种一代丰₁×日原和日原×丰₂的效应大于纯品种济宁和丰₂。获得糖甙成分和产量明显改善的有7个突变系。初步证实离子注入在甜菊育种中具有较好的应用价值。更多还原

【Abstract】 Dry seed of stevia were implanted with 60-100 keV nitrogen ion and 75 keV carbon ion of various doses, and the effects of the composition and yield of stevioside were studied. The results showed that ion beam could induce variation in total stevioside yield and the composition of the plant. The best treatment was 75 keV nitrogen ion with 5 X 1014 N+/cm2, the stevioside yield and Rebaudioside A (R-A) content were increased by 4.74% and 14.08% respectively. The effects induced by implantation of carbon ion were higher than those induced by implantation of nitrogen ion. Effects of Feng1 X Ri Yuan and Ri Yuan X Feng2 are higher than those of Ji Ning and Feng2. Seven mutation lines were selected from the mutation progenies. The stevioside composition of these lines were priviously improved. The results suggest a potential application of ion implantation in stevia breeding.更多还原