Abstract
Large and small starch granules were isolated and characterized from grains of 6 cultivars of barley, one with waxy and 5 with nonwaxy endosperms, including types with both high protein and high lysine, and high-lysine types. Large granules of a given nonwaxy cultivar contained more amylose than small granules of the cultivar. Large granules of a cultivar contained more long B chains of amylopectin and had the lower ratio of Fr. Ill to Fr. II, which represent one of the structural characteristics of amylopectin, than those of small granules of the cultivar. Small granules had higher conclusion temperature and smaller heat of gelatinization than those of large granules of the cultivar by DSC. Small granules of a nonwaxy cultivar were digested about 4 times or more faster than large granules of the cultivar by Rh. glucoamylase.
