Abstract:Protoplasts were isolated from sterile hypocotyls of Chinese cabbage Hetouzao A,Hetou zao B,Qingmaye C,Qingmaye D,Shite No.1,Shite No.2,Yuqing,Yunnong No.1 and were cultured on DPD medium containing 1.5 mg/L NAA,0.6 mg/L TDZ,BA,0.5 mg/L 2,4-D.The first ce