A complete random test was conducted by a 3-factor experiment that virus-flee plandets of different varieties of potato （Atlantic and Dianshu No.6 ） were cultured on the MS media by used in which the sucrose or white crystal sugar was used as carbon source and chlorocholine chloride at 0mg·L^-1l,100mg·L^-1, 150mg·L^-1, 200 mg·L^-11, 250mg·L^-1, and 300mg·L^-1 was contained respectively. We have comparatively studied the agronomical characters of the virus-free plantlets of potato in different treatments. The results showed that the grow...
