Zarei Iman, Luna Emily, Leach Jan E, McClung Anna, Vilchez Samuel, Koita Ousmane, Ryan Elizabeth P
Department of Environmental and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO 80523, USA.
Metabolites. 2018 Oct 9;8(4):63. doi: 10.3390/metabo8040063.
Rice ( L.) processing yields ~60 million metric tons of bran annually. Rice genes producing bran metabolites of nutritional and human health importance were assessed across 17 diverse cultivars from seven countries using non-targeted metabolomics, and resulted in 378⁻430 metabolites. Gambiaka cultivar had the highest number and Njavara had the lowest number of metabolites. The 71 rice bran compounds of significant variation by cultivar included 21 amino acids, seven carbohydrates, two metabolites from cofactors and vitamins, 33 lipids, six nucleotides, and two secondary metabolites. Tryptophan, α-ketoglutarate, γ-tocopherol/β-tocopherol, and γ-tocotrienol are examples of bran metabolites with extensive cultivar variation and genetic information. Thirty-four rice bran components that varied between cultivars linked to 535 putative biosynthetic genes using to the OryzaCyc 4.0, Plant Metabolic Network database. Rice genes responsible for bran composition with animal and human health importance is available for rice breeding programs to utilize in crop improvement.
水稻（L.）加工每年产生约6000万吨米糠。利用非靶向代谢组学技术，对来自七个国家的17个不同品种水稻中产生具有营养和人类健康重要性的米糠代谢产物的基因进行了评估，共鉴定出378 - 430种代谢产物。甘比亚卡品种的代谢产物数量最多，而尼亚瓦拉品种的代谢产物数量最少。不同品种间有显著差异的71种米糠化合物包括21种氨基酸、7种碳水化合物、2种来自辅因子和维生素的代谢产物、33种脂质、6种核苷酸和2种次生代谢产物。色氨酸、α - 酮戊二酸、γ - 生育酚/β - 生育酚和γ - 生育三烯酚是米糠代谢产物中品种差异大且具有遗传信息的例子。利用水稻代谢途径数据库OryzaCyc 4.0，将不同品种间存在差异的34种米糠成分与535个假定的生物合成基因联系起来。负责米糠成分且对动物和人类健康具有重要意义的水稻基因可供水稻育种计划用于作物改良。
