| By means of polyaerylamide gel electrophoresis, peroxidase isozyme, esterase isozyme and a-amylase isozyme of Dioscorea Zingiberensis, which were gathered from different growing environment conditions, were analyzed. With the results of 3 kinds of isozyme analysis and the analysis of 15 populations morphology and climate, Dioscorea zingiberensis were divided into 5 ecotypes. The main results were shown as follows:1. The diversities, of which 15 Dioscorea zingiberensis local populations in characteristics of morphology, climate and physiology, showed the significant inner genetic diversities of the species of Dioscorea zingiberensis.2. Through the clustering analysis with the data of isozyme analysis, morphology analysis and climate analysis, 15 local populations were divided into 5 ecotypes. Ecotype I included Shanxi-fengxian, Shanxi-shiquan, Hubei-yunxi, Hubei-wudang, Hubei-yichang, Hunan- anhua, Hunan-shimen. Gansu-liangdang population was belong to ecotype II. Ecotype III consisted of Hubei-songzi and Hubei-Jingmen. Ecotype IV included 4 populations which were Hubei-fangxian, Sichuan- panzhihua, Sichuan-renshou and Yunnan-yuxi. Ecotype V was Yunnan- yongsheng populations.3. There were inner diversities of ecotype and ecotype. It seemed that they were still in the state of differentiation. Author considered that the place of origin of Dioscorea zingiberensis was Wudang of province of Hubei.4. Yunnan-yuxi population originated from Hubei province. And Yun-yongsheng population should be Dioscorea parviflora, just as the description by Pei Chien and Ting Chih-tsun.
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