【摘要】 冬小麦经电子束、中子和γ射线辐照后,均产生生物效应。电子束对中子和γ射线的相对生物效应（RBE）值均小于1,中子对γ射线的RBE值远远大于1。这说明电子束的M₁生物效应远远小于中子的M₁生物效应而与γ射线的M₁生物效应相近。对于电子束辐照,M₁的半致死剂量范围是185～370Gy,更靠近370Gy,致死剂量是740～925Gy。 对于M₂的诱变效率,电子束>中子>γ射线。电子束辐照可以扩大突变谱,提高诱变效率,最佳诱变剂量范围是370～555Gy,中子比γ射线诱变效率高,较适宜的辐照剂量为25Gy。当M₁生物损伤稍大于50%时,用电子束进行辐照,M₂代的诱变频率较高。更多还原

【Abstract】 After winter wheat was irradiated by electron beam, fast neutron and Y?rays, respectively, the RBE value of electron beam to both fast neutron and Y-rays was less than one,the RBE value of fast neutron to Y-rays was largely more than one. This results indicated that biological effect of M: generation induced by electron beam was less than that of fast neutron very much,and similar to Y-rays irradiation. With electron beam irradiation, the half-lethal doses of MI generation were from 185 to 370Gy, closer to 370Gy, the lethal doses from 740 to 925Gy. Larger M2 mutation efficiency with electron beam treatment as compared with that with both fast neutron and Y-rays. Wider mutation spectrum and higher mutation efficiency than that with other physical mutagens can be obtained with electron beam irradiation, higher about 30% than that with Y-ray irradiation.The best doses of irradiation using electron beam were from 370 to 555Gy.Fast neutron, better dose of which was 25Gy, could induce more mutants than that with Y rays in M2 generation. The dose in which biological injury reached to 5Q% was best dose for M2 mutants by electron beam irradiation.更多还原