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利用北京正负电子对撞机直线加速器E2束流打靶产生高能混合粒子场,以185 Gy的剂量处理两个冬小麦品种SP8724和D6-3,并与相同剂量的γ射线相比较,研究其生物诱变效应。结果表明,混合粒子场处理小麦具有比γ射线处理更高的相对生物学效应,M2代诱变效果显著,总突变频率以及矮杆、早熟和穗型等有益突变频率明显高于γ射线处理的。高能混合粒子场辐照有可能成为一种新的诱变源在作物改良中发挥作用。
Beijing Institute of Science and Technology, Beijing 100083, China; 2.College of Animal Science and Veterinary Medicine, Beijing University of Chemical Technology, Beijing 100083, China) Two wheat cultivars, SP8724 and D6-3, were treated with a dose of 185 Gy and irradiated with the same dose of γ- Variable effect. The results showed that the hybrid particle field treatment had higher relative biological effects than γ-ray treatment, and the mutagenesis effect of M2 generation was significant. The total mutation frequency, the frequency of beneficial mutation such as dwarf bar, precocity and panicle were significantly higher than that of γ-ray treatment . High-energy mixed particle field irradiation may become a new mutagenesis source to play a role in crop improvement.