不同品种稻米中硒、锌、铁含量比较及其膳食摄入量评估

Genotypic Variations in Concentrations of Selenium,Iron and Zinc in Rice Grain and Its Dietary Exposure Assessment

采用电感耦合等离子体质谱ICP-MS法测定种植在广西天然富硒土壤上的113个我国主栽水稻品种稻米硒、铁、锌含量。结果表明,稻米硒、铁、锌含量存在显著基因型差异,其中"两优287""宜香99E-4"稻米硒含量较高,"惠优287""顺优109"稻米铁含量比较高,"华优229""武育糯16号"稻米锌含量较高,可作为高富微量元素水稻种质资源应用于富硒、富铁、富锌稻米生产,食用高硒、高铁、高锌稻米可以提高居民硒、铁、锌摄入量,且摄入硒、铁、锌的量是安全的。试验结果为高含量微量元素稻米生产和中国居民微量元素精准补充提供科学依据。

The concentrations of selenium(Se),iron(Fe)and zinc(Zn)in rice grain of 113 rice(Oryza sativa L.)genotypes grown in natural selenium-rich soil of Guangxi were examined by ICP-MS.The results showed that significant differences among the 113 genotypes were found for grain Se,Fe and Zn concentrations.Among these tested rice genotypes,"Liang you 287"and"Yi xiang 99 E-4"contained high grain Se concentration,"Hui you 287"and"Shun you 109"contained highest grain Fe concentration,and"Hua you 229"and"Wu yunuo 16"contained highest grain Zn concentration,which mean that they could be used as germplasm resources of high-trace element rice germplasm resources in the production of Se-,Fe-and Zn-enriched rice.Assessment of Se,Fe and Zn intake for the Chinese population based on these rice genotypes showed that consumption of Se,Fe and Zn enrichment in rice grain could increase the Se,Fe and Zn intake of residents,and didn’t exceed the safe daily the intake level.The results were useful for developing micronutrient biofortification strategies.