The frequency of shoot regeneration from cotyledon explants of fifty days fast vegetable and Zhejiangzaoshu No. 5 is higher. So both varieties were used as the material for transgenic experiment.

• 子叶外植体的芽分化率以50天快菜和浙江早熟5号为高，故此以这两个品种作为转基因的试验材料。