Comparative Analysis on Starch Properties of Different Buckwheat Cultivars Collected from the Major Buckwheat Planting Area in Guizhou Province

Currently,physiochemical,rheological,and in-vitro simulated digestive properties of starches extracted from the 11 buckwheat cultivars grown in Wei-ning county,Guizhou province,were investigated. The results showed that starches from different buckwheat cultivate possessed varied physicochemical,rheological and in-vitro simulated digestive properties. Starches extracted from "QK No.8","QK No.5","GZS No.1" and "GBM No.16" showed higher transparency,and those extracted from "DK No.1","QBK No.1" and "QK No.3" presented better freeze-thaw stability. "GZS No.1","QK No.5",and "GBM No.16" had a strong property retrogradation. Microstructure analysis indicated that buckwheat starch granules were irregular polygon with sharp edges and corners. The highest storage modulus and best anti-digestion capability were presented in starch of QK No.3 and QK No.5,respectively. Conclusively,"QK No.5" buckwheat starch possessed better processing and digestion resistant properties,which is more suitable for processing of functional food.