强烈的放射线可使生物体衰变、死亡或局部组织破坏,但适量的放射线能可使生物体发生突然变异,这种变异是超出了用杂交方法或控制生活条件等方法的范围。如用X线照射家蚕(Bombyx mori L.)后,可使染色体转座,因而形成雌性卵呈黑色,雄性卵呈白色;于是再利用光电管的设备来杀死黑卵,留存白如,由于雄蚕茧子丝量多,就大大地减轻了生丝的生产成本。因为放射线的施用范围广,见效快,故 Strong radiation can degrade organism, death or local tissue damage, but the amount of radiation can make sudden changes in organisms, this mutation is beyond the method of hybridization or living conditions and other methods. Such as the use of X-ray irradiation Bombyx mori L. (Bombyx mori L.), the chromosomes can be transposed, thus forming a female egg was black, male eggs were white; then the use of photocell equipment to kill black eggs, leaving white as, due to Male silkworm cocoon silk volume, it greatly reduces the raw silk production costs. Because of the wide range of application of radiation, quick, so