DNA barcoding coupled with high-resolution melting analysis for nut species and walnut milk beverage authentication.

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ID: 84052
2020
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Abstract
Walnut (Juglans regia L.) is one of the most widely cultivated nuts. Walnut milk beverage is very popular in China due to its nutritional value. However, adulterated walnut milk ingredients have been detected in the Chinese market. Peanut and soybean are sold at much lower prices than walnut and are reported as common adulterated species in the industrial chain of walnut milk production. Therefore, the purpose of this study is to develop an accurate and efficient method for detecting the authenticity of raw materials of walnut milk beverage.DNA barcoding and high-resolution melting (HRM) analysis were used to identify common adulterated raw ingredients such as peanut and soybean in commercial walnut milk beverage samples. The chloroplast psbA-trnH gene was used for sequencing, and HRM analysis was performed. We also prepared in laboratory experimental mixtures with different quantities of walnut, peanut and soybean. HRM analysis of the experimental mixtures clearly distinguished all of them. Results revealed that most of the walnut milk beverage samples fell in the same cluster of walnut species. Several samples fell in the cluster of peanut, confirming that they were adulterated walnut milk products.The results revealed that HRM analysis based on the psbA-trnH barcode sequence can be used to identify raw ingredients in walnut milk beverages. This article is protected by copyright. All rights reserved.
Reference Key
ding2020dnajournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Ding, Yanfei;Jiang, Guangze;Huang, Lihong;Chen, Chengtong;Sun, Junwei;Zhu, Cheng;
Journal Journal of the science of food and agriculture
Year 2020
DOI
10.1002/jsfa.10241
URL
Keywords
dna barcoding authentication high-resolution melting walnut milk beverage psba-trnh

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