激光与60Coγ射线复合处理对小麦细胞遗传学效应和诱发突变的影响

本实验利用氮分子激光、⁶⁰Coγ射线和激光加⁶⁰Coγ射线分别照射小麦干种子，对其苗高根长、根尖细胞分裂指数、染色体畸变和 M₂性状变异进行了测定。发现激光能促进幼苗和胚根的生长，射线能使幼苗和胚产生辐射损伤效应。激光与γ射线复合，不但能修复γ射线的损伤效应，而且能提高γ射线的诱变效力。

Effect of Laser and Gamma Radiation on Cytogene tics and Modicficnal Mutation of the Wheat

In the present experiments,dry wheat seeds were expos ed to N₂ laser ⁶⁰Coγ rays and N₂ laser+⁶⁰Coγ rays.Seedling height,root length,index of cells division of root tip,chromosomal aberrations and form of variability ia M₂ generation have been determined in this experiment.Laser radiations stimulated growth of the root and the seedling,but damage effect of seedling and root was produced by γ-rays.Chromosomal aberrations and form of variability in M₂ generation were caused by both laser and gamma radiations.The results indicated that the yields of mutagenic by laser post-treatment were markedly higher than the treatment with r-rays alone,but laser is efficient to repair the damage induced by gamma radiations too.