文献类型：期刊文献

英文题名：The phytochemical components of walnuts and their application for geographical origin based on chemical markers

作者：Mo, Runhong[1] Zheng, Yuewen[1] Ni, Zhanglin[1] Shen, Danyu[1] Liu, Yihua[1,2]

第一作者：Mo, Runhong

通信作者：Liu, YH[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou, Peoples R China;[2]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Peoples R China

年份：2022

卷号：6

外文期刊名：FOOD QUALITY AND SAFETY

收录：;Scopus(收录号：2-s2.0-85144913228);WOS:【SCI-EXPANDED(收录号:WOS:001094886900045)】；

基金：This study was supported by the Fundamental Research Funds of Chinese Academy of Forestry (CAF) (CAFYBB2017QC002 and CAFYBB2019QD002).

语种：英文

外文关键词：Walnut; chemical marker; geographical origin; Random Forest method; discriminant model

摘要：Place of origin has an important influence on walnut quality and commercial value, which results in the requirement of rapid geographical traceability method. Thus, a method for geographical origin identification of walnuts on the basis of nutritional quality of walnuts from China was conducted. The concentrations of 43 phytochemical components were analyzed in walnut samples from five different walnut-producing regions of China. Based on 14 chemical markers selected by the Random Forest method from these phytochemical components, a new discriminant model for geographical origin was built, with the corresponding correct classification rate of 99.3%. In addition, the quantitative quality differences of walnuts from five regions were analyzed, with values of 0.17-1.43. Moreover, the top three chemical markers for the geographical origin discriminant analysis were Mo, V, and stearic acid, with contribution rates of 26.8%, 18.9%, and 10.9%, respectively. This study provides a potentially viable method for application in food authentication.