Abstract: quantitative characteristics of 60 wolfberry germplasms were investigated at Wolfberry Genetic Collection in Yinchuan, Ningxia from 1998 to 2006. The characteristics including average quantity of shoot growing, percentage of drop, flower diameter, leaf length, leaf width, leaf thickness, leaf stalk,length, internode length and first inflorescence length were analyzed statistically. The results showed that the coefficients of variation of all quantitative characteristics were above 18% and all frequency distributions were
in normal distribution. Grade index was given by statistical data for wolf berry description. The grade indexes were recorded on 1 - 5 scales, and the third grade as a middle one occupied the most distribution. In general,one or two reference cultivars for each grade were given, which are planted or used by breeders widely in China.

Key words: wolfberry, germplasm resource, botanical quantitative characteristic, evaluation criteria