Y射线是诱变育种利用得最多的诱变因素，其对不同作物有不同的适宜辐照剂量．剂量过低、过高都会降低诱变效率和选择效果．本研究旨在研究一CO－y射线辐照黄瓜、苦瓜、西瓜和社豆的适宜诱变剂量，为这些作物的辐射育种的开展提供依据．l，材料与方法1．l材料“夏青三号”黄瓜、 Y-rays are the most commonly used mutagenic factors in mutagenesis breeding and have different suitable radiation doses for different crops. Low doses, too high will reduce the mutagenesis efficiency and the choice of effect. The purpose of this study was to study the suitable mutagenic doses of Cu-Hg, Balsam pear, Watermelon and Soybean irradiated by CO-y rays, which provided the basis for the radiation breeding of these crops. l, materials and methods 1. l Material “Xia Qing three” cucumber,