论文部分内容阅读
本文通过超低能（１１０ｋｅＶ）离子注入和同步辐射碳光辐照两种手段处理了小麦种子，经萌发在其根尖细胞中均观察到了多种类型的染色体时变，而且同对照相比，均有明显的微核率与染色体总畸变率。根据理论分析和一些有关的实验证据，超低能离子注入小麦种子，因离子本身射程非常短（＜１μｍ），不可能直接损伤麦皮下面的胚细胞，而由注入离子在作物种子内产生的各种特征Ｘ－射线，只要剂量足够，却能达到较深的部位，通过它们的间接作用就会损伤胚细胞造成生物学效应。因此，赵低能离子注入作物种子激发产生的特征Ｘ－射线是其诱变育种的一种重要机制．
Wheat seeds were treated by both ultra-low energy (110 keV) ion implantation and synchrotron radiation carbon light irradiation. Various types of chromosomal changes were observed in root apical cells after germination. Compared with the control There is a clear micronucleus rate and total chromosome aberration rate. According to theoretical analysis and some related experimental evidence, ultra-low energy ion implantation of wheat seeds can not directly damage the germ cells below the wheat bran due to the very short range of the ions themselves (<1μm) Species X-ray, as long as the dose enough, but can reach deeper parts, through their indirect effect will damage the embryonic cells resulting in biological effects. Therefore, the characteristic X-ray induced by seed excitation of Zhao low energy ion implanted crops is an important mechanism of mutation breeding.