The regeneration systems in vitro had been systematically established in You Nane (Prunus salicina Lindl cv. Younai) and its genetic transformation was preliminarily studied. As to regeneration systems, an optimal regeneration system was established by shoot tip culture; another good regeneration system which the test-tube plantlet stem segments could regenerate adventitious buds directly, had also been established; moreover, adventitious buds regenerated from leaf of test-tube plantlet, cotyledon and epico...