HARDLY-DIGESTIBLE RICE, AND HARDLY-DIGESTIBLE STARCH

摘要

PROBLEM 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.

SOLUTION: 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.

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