^(60)Co-γ射线对新农1号狗牙根辐射诱变初探  

Preliminary study on irradiation of ^(60)Co-γ radial on Cynodon dactylon cv.Xinnong No.1

作　　者：李培英[1] 孙宗玖[1] 阿不来提[1] 

机构地区：[1]新疆农业大学草业工程学院新疆草地资源与生态自治区重点实验室,新疆乌鲁木齐830052

出　　处：《草原与草坪》2007年第6期22-25,共4页Grassland and Turf

基　　金：新疆维吾尔自治区资源与生态重点实验室项目(XJDX0201-2005-04;XJDX209-2007-01);科技部国家科技支撑项目(2006BAD01A19-2-3);新疆农业大学教研项目资助

摘　　要：利用不同剂量的60Co-γ射线对新农1号狗牙根种子与匍匐茎进行处理,结果表明:新农1号狗牙根干种子诱变半致死剂量为308.6 Gy,匍匐茎的诱变半致死剂量为60.7 Gy;146.1 Gy辐射剂量促进新农1号狗牙根干种子萌发,且随着剂量的增加,对种子萌发的抑制作用加强。匍匐茎经辐射处理后,新农1号狗牙根的叶长、节间长度变短,降幅分别为17.60%~32.10%、17.40%~28.60%,叶宽与茎粗变幅分别为-5.40%~12.20%与-7.00%~28.10%。色泽上,辐射能够使叶色变深,且接近半致死剂量辐射狗牙根匍匐茎,可以获得优良的变异。The seeds and stolons of Cynodon dactylon cv. Xinnong No. 1 were irradiated with different doses of ^60Co-γ radial. The results show that the semilethal doses for seeds and stolons were 308.6 Gy and 60.7 Gy respectively. Irradiation dose of 146. 1 Gy could promote seed germination,the restraint on seed germination increased gradually with the increasing of dose. After stolon being irradiated, the length and internode of leaves were shortened to 17.60%-32.10% and 17.40%-28.60% respectively,and the variation range of leaf width and internode were -5.40%-12.20% and -7.00%-28.10% respectively. Meanwhile,the leaf color turned to be darkening. Irradiating the stolon of Cynodon dactylon cv. Xinnong No. 1 with a dose close to the semilethal could lead to excellent variation.

关 键 词：新农1号狗牙根 辐射 半致死剂量 变异 

分 类 号：S543.035[农业科学—作物学]