In order to provide the oretical basis for cultivar regionalization andbreeding vtilization ofplum germplasm resources, The hardiness of 36 typicalplum cultivars or types which belong to Prunussalicina, P. domestica, P. simonii, P. nibs, P. americana, P. ussuriensis, P. cerasdera and natural hybridbetween plum andapricot respectively have been determined by means of electronic conductivity, growthreinstatement and tissue browning evaluation methods with dormant shootsin 1995 ~ 1996 at Xiongyue,Liaoning. The...