HARDLY-DIGESTIBLE RICE, AND HARDLY-DIGESTIBLE STARCH

摘要

PPROBLEM TO BE SOLVED: To provide new hardly-digestible rice containing hardly-digestible starch, inhibiting abrupt increase in blood glucose caused by digestion of amylose, and allowing an eater to enjoy crispy palate feeling without high-pressure treatment. PSOLUTION: The hardly-digestible rice comprising wx/ae rice as mutant rice lack in amylose synthetic enzyme I (GBSSI) and amylopectin branching enzyme II (BEIIb), is obtained by subjecting wild nonglutinous rice to N-methyl-N-nitrosourea treatment or the like. The rice substantially contains no amylose, and contains hardly-digestible starch grains where the peak of the glucose polymerization degree (DP) of an amylopectin lateral chain falls on 13-15, and the amylopectin lateral chain having glucose polymerization of 12 accounts for 65 wt.% of the whole amylopectin side chain. PCOPYRIGHT: (C)2010,JPO&INPIT