Studies on the Distribution of Rice Seed Resource in the Environment of Nation Enrichment in Yunnan Province

6 121 local rice resource materials of Yunnan province and the relative information about their ecology geography and 52 nations were coordinated in criterion.The new GIS technique was used to analyze the distribution of ecology geography,distribution habit of local rice resource in Yunnan province.Results showed that south subtropic zone of southwest area of Yunnan was the center of rice resource and nation enrichment.The region of nation enrichment was also the diversity center of rice resource relatively.In the regions with great amount of nation populations,the resource amount increased relatively and there was an increasing trend with the increase of the nation populations.The two subspecies type resource of indic rice and japonica rice also showed the same distribution rule.