Abstract: 【Objective】 In order to understand the genetic diversity basis of quinoa germplasm resources,improve the efficient use of germplasm resources,and promote the breeding process. 【Methods】101 quinoa germplasm resources were collected at home and abroad for determination of phenotypic traits and analysis of genetic diversity. Phenotypic traits included growth period,plant height,stalk diameter,kernel weight per plant,thousand kernel weight,protein content,lysine content,etc. 【Results】The coefficient of variation of each phenotype was significantly different. The largest one was coefficient of variation of grain weight per plant,which was 36.0%,and the smallest one was growth period,which was 5.2%. The range of phenotypic traits genetic diversity index was 1.960-2.085. Among all the genetic diversity indexes,the largest one was growth period,which was 2.085,and the smallest one was kernel weight per plant,which was 1.960. Through the correlation analysis of phenotypic traits,it showed different degrees of significant negative correlation （-0.36 and -0.32） between the grain weight per plant and the content of protein or lysine. Cluster analysis was grouped 101 quinoa germplasm accessions into four clusters. Among them,the first group contains 29 accessions of material,the second groups includs 30 copies of materials,the third group includs 18 copies of material,and the fourth group contains 24 copies of material. 【Conclusion】It is necessary to pay attention to improving both grain yield and nutritional quality at the same time in quinoa breeding.

Key words: Quinoa, Germplasm resources, Phenotypic traits, Genetic diversity