Abstract
The resources, distribution, relevant environmental factors and seed traits of Jatropha curcas (Euphorbiaceae) occurring in Yunnan Province were investigated and studied in the present paper. The results showed that the average thousand-seed weight, kernel percentage, kernel oil percentage and seed oil percentage are 567.9 g, 56.671%, 61.781% and 35.133%, respectively. There are very significant differences in thousand-seed weight, kernel percentage, kernel oil percentage and seed oil percentage among populations. The populations marked as Lijiang A, Honghe D, Lijiang B, and Yuxi A are evaluated as the most potential ones for future development. Temperature is the most significant limitation factors on distribution of J.curcas. There is a remarkable negative correlation between altitude and mean annual temperature of the distribution areas. The dry-hot valleys in Jinshajiang River and Yuanjiang River are the most suitable areas for J.curcas plantation, and followed by the hot and low elevation areas in Lincang, Baoshan, Puer and Xishuangbanna prefectures. Suggestions were proposed for further studies and development in Yunnan Province.
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