摘要
12个不同类型栽培稻品种的干种子经120-480Gy^(137)Csγ射线辐照后,根尖细胞有丝分裂指数(MI)和微核细胞率分别与照射剂量呈显著相关。随着辐照剂量的增加,有丝分裂指数下降。微核细胞率增加。协方差分析表明,不同类型栽培稻的辐射细胞学效应差异不显著,而品种间差异显著,因此在辐射育种选择亲代材料时,应考虑其辐射敏感性。
After dry seeds of twelve cultivars belonging to different types of cultivated rice were treated bt ^(137) Cs Gamma—rays, their dose—effects of mitotic index and micronucleus cell rate in root tip cells were fitted by linear regression equations.As the dose increased, the mitotic index decreased but the micronucleus cell rate increased.Among the different types of rice, the differences of radiation cytological effects were not significant but significant among the cultivars.It is necessary to consider the radio—sensetivity of species when selecting the material on radiation breeding.
出处
《浙江农业学报》
CSCD
1992年第A09期25-29,共5页
Acta Agriculturae Zhejiangensis
关键词
Γ射线
水稻
细胞学效应
Gamma-rays
Mitotic index
Micronucleus cell rate
Linear regression equation
Cultivated rice
