Biofortification in a food chain approach for rice in China

摘要：

According to the available data on zinc requirements and food intake, the proportion of national population at risk for low Zn intake and hence Zn deficiency related health problems, is 68％-95％ in South and South-East Asia, Africa and the Eastern Mediterranean regions where diets are largely plant based (IZiNCG, 2004). At global level this problem is being approached by a Global Challenge Program aiming at breeding for micronutrient-rich staple crops, biofortification. In China a food chain approach has been tested in an area where flooded rice is gradually replaced by aerobic rice production and proved to assist in setting realistic biofortification objectives. Important results are that the change in rice production systems leads to lower uptake of Zn by rice plants, the use of fertiliser can only to a limited extend enhance Zn content in grain as a threshold seems to exist, and the habit of eating white rice does not require breeding for low-phytate as polishing removes most of the phytate. Therefore, breeding objectives consist of breeding for high Zn efficiency, high Zn harvest index and enhanced translocation of Zn to the grain. Genetic modification might be needed to overcome the mentioned threshold. Breeding for low phytate in rice is not recommended as it hardly contributes to increased Zn supply from rice and because other dietary components, such as soybean products, provide much more phytate potentially inhibiting Zn uptake from the entire meal.

关键词： biofortification food chain phytate rice zinc breeding targets

作者: MA Slingerland Zhang FS TJ Stomph Gao XP JF Liang Wen Jiang

作者单位: Wageningen University, Crop and Weed Ecology Group, PO Box 430, 6700 AK Wageningen, the Netherlands China Agricultural University, College of Resources and Environmental Science, Beijing 100094, China China Agricultural University, College of Food Science and Nutrition Engineering, Beijing 100083, Ch China Agricultural University, College of Resources and Environmental Science, Beijing 100094, China

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 293-294

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）