Abstract:To investigate the geographical distribution profile of adzuki bean resistant starch and cooking hardness, analyze the correlation between cooking hardness and nutritive index, and screen the high resistant starch content or low cooking hardness germplasm resource, 140 adzuki bean resources were collected from different provinces in China. The results were that: The average content of 140 adzuki bean resistant starch and cooking hardness were 14.25 % and 150.72 g, respectively. Adzuki bean germplasm resource in Jilin province had the highest resistant starch content (15.71 %), while in Inner Mongolia had the lowest cooking hardness (96.42 g). There was a highly significant negative correlation between total starch and resistant starch. Cooking hardness showed no significant correlation with total starch or protein, but positive and significant correlation with resistant starch. And 12 elite resources with resistant starch content > 17.83 % and 9 resources with cooking hardness < 76.48 g were screened respectively. The screened high resistant starch germplasm resources could be used for diabetic special adzuki bean breeding and product development, while the low cooking hardness resources could be utilized in bean meal or gruel manufacture.