近赤外分光法による米デンプンの消化性とグリセミック・インデックスの推定

日本作物学会紀事

井上 直人¹  大澤 実² 

[1] 信州大学大学院総合工学研究科;群馬県農業技術センター

关键词: Near-infrared spectroscopy;    近赤外分光法;    Glycemic index;    グリセミック・インデックス;    Rice;    ç±³;    Digestion rate;    消化速度;    Starch hydrolysis;    デンプン消化;   

DOI  :  10.1626/jcs.77.443

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Near-infrared reflectance spectroscopy (NIRS) was applied to develop a conventional method for estimating the glycemic index (GI) and starch digestion pattern with α-amylase of brown-rice flour. The digestion pattern was expressed by a non-linear equation including 3 parameters, "parameter a" that expresses the digestible fraction by prepared heat treatment, "parameter b" t hat expresses the amount of digestible fraction during digestion trials, and "parameter c" that expresses the starch hydrolysis rate. The GI value was expressed by the EGI obtained from the in vitro starch digestion trial. The accuracy of the validation was evaluated by the evaluation index and the ratio of standard deviation of reference data in prediction sample set to the standard error of prediction. The results of validation showed that the estimation method by NIRS was useful to estimate the value of "parameter c" and EGI and for primary screening of the varieties in the rice breeding system, suggesting that it was useful to select the rice varieties having a lower rate of starch digestion. The results also suggested that the sample segregation by the rice subspecies or production region was useful to improve the accuracy of estimation.

【 授权许可】

Unknown