【摘要】 本文报道低龄雌鼠受到0.15—1.56Gy,0.05Gy/min⁶⁰Coγ射线照射后,过一定时间与正常雄鼠同笼。在胚胎满9.5—11d时活杀孕鼠,观察其染色体异常胚胎发生率及显性致死突变率与剂量的关系。结果表明,在剂量为0.15Gy时,其非整倍体胚胎发生率未见增加;在0.50Gy以上时,似随剂量增加而增加。但三体胚胎的剂量效应关系不明显。观察到的显性致死突变率与受照剂量呈直线相关。在上述剂量范围内,显性致死突变率为5.59％。显性致死突变的效应比非整倍体胚胎的效应高。更多还原

【Abstract】 Relationship between aneuploid, dominant lethal mutaions and dosesin young female mice induced by low doses γ-rays was examinated. The results sug-gest that the frequencies of aneuploid of embryos were not found increase at 0.15 Gy,but increases at over 0.50 Gy after irradiation in groups. The frequencies of ancup-loid and dominant lethal mutations were increased with increasing doses and fittedlinear relationship.The dose-response relationship of trisomic was not significant. Thefrequency of dominant lethal mutations induced by ⁶⁰Co γ irradiation is 5.59%. Theeffect of dominant lethal mutation is higher than that of the aneuploid.更多还原