Inter-laboratory validation by event-specific qPCR methods for the detection of genetically modified insect and herbicide-tolerant maize DBN9501

文献类型： 外文期刊

第一作者： Wang, Jing

作者： Wang, Jing;Zhang, Ruiying;Guan, Haitao;Yang, Yang;Ding, Yijia;Yuan, Ran;Zhang, Xiaolei;Wen, Hongtao;Xiao, Bing;Xiao, Bing;Li, Lingyan;Liang, Jingang

作者机构：

关键词： Genetically modified maize; DBN9501; GMO; Event-specific method; Inter-laboratory ring trial; RT-PCR

期刊名称：JOURNAL OF CONSUMER PROTECTION AND FOOD SAFETY （ 影响因子：2.4； 五年影响因子：1.5 ）

ISSN： 1661-5751

年卷期： 2023 年

页码：

收录情况： SCI

摘要： DBN9501 is a new maize transgenic event characterised by being resistance to insects and herbicides. To meet genetically modified (GM)-labeling requirements and monitor the unintended release of genetically modified organisms (GMOs), developing a creditable and applicable method for identifying and quantifying GM events is essential. Herein we developed an event-specific method and validated it through inter-laboratory ring trials using blind samples. The limit of detection (LOD) and limit of quantification (LOQ) of copy number ratio were confirmed at 0.05% and 0.1%, respectively. The quantitative bias ranged from -3.52 to 10.38%, and the relative standard deviation (RSD) of the method was < 25%. Furthermore, the expanded uncertainty for the blind samples S1 - S5 was 0.22%, 0.10%, 0.05%, 0.03%, and 0.02%. These results demonstrated that the event-specific quantitative PCR method could identify and quantify GM DBN9501 for further routine lab analysis.

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