水稻抗性淀粉含量的研究

抗性淀粉是近年来发展起来的一个新概念,在代谢特性上类似于膳食纤维,具有非常重要的生理功能,可降低糖尿病患者饭后血糖值、控制体重、有效防止肠道疾病及降血脂等功效。开发大米抗性淀粉产品,具有广阔的市场前景。抗性淀粉具有较小的分子结构,是白色无异味的多孔性粉末。抗性淀粉分为四类:RS1(物理包埋淀粉)、RS2(抗性淀粉颗粒)、RS3(回生淀粉)和RS4(化学改性淀粉)。直链淀粉、支链淀粉和基因类型影响着抗性淀粉的含量。通过筛选突变体,可以培育出RS含量较高的水稻新品种(系)。

Study on Resistant Starch Content of Rice

Resistant starch is a new developing concept.Like food fiber in metabolism,resistant starch plays a very important role in lowering diabetics' blood sugar concentration after meals,maintaining body weight,controlling intestinal disease and lowering blood lipids.Resistant starch is a white and unscented multiple-hole powder with a small molecular structure,which is divided into four types: RS1(physic investing starch),RS2(resistant starch granule),RS3(retrogradation starch) and RS4(chemical modified starch).The resistant starch content is determined by amylose content,amylopection content and gene type.The rice variety with high resistant starch content can be bred through screening mutants.