Fifty buckwheat varieties were grown in our experimental farm and their proximate and medicinal constituents were analyzed and compared. These determinants might provide crucial information for the development of buckwheat as a nutraceutic product. The results showed that the protein, fat and ash contents of Tartar dehulled buckwheat were higher than those of common buckwheat varieties by 37.7%, 10.7% and 26.8%, respectively, but the starch content was lower by 7.1%. Moreover, Tartar buckwheat comprised 8.3 and 7.2 times of rutin and quercetin in comparison with common buckwheat varieties. The amounts of potassium, magnesium, ion, and manganese in Tartar buckwheat were found higher than those in common buckwheat varieties by 35.5%, 32.8%, 16.0%, and 17.2%, respectively. It is recommended that Tartar buckwheat is suitable for development of nutraceutic products.

Key words: buckwheat, medicinal constituent, rutin, quercetin.