Forty improved rice varieties developed in Jilin province were genealogized, and their inheritance were analysed in this text. The result showed that most of the improved rice varieties in Jilin province had a close blood relationship with Japanese varieties. They were divided into five derivative systems as Aikoku, Kame no o, Bozu. Hokai No. 1 and Asahi. The main sources of their cytoplasms originated from four Japanese ancestral varieties: Higashigo No. 2 Sekiyama ine, Hojo and Bozu. And the main sources of their cellnucleuses originated from seven Japanese ancestral varieties. Kame no o, Aikoku, Higashigo No. 2, Bozu, Sekiyama ine, Asahi and Shonai wase. In order to increase yield potency of the rice variety it is necessary to collect and introduce various new rice resistant sources and new rice genotypes widely in the world.