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Interlaboratory Trial Validation of an Event-Specific Qualitative Polymerase Chain Reaction-Based Detection Method for Genetically Modified RT73 Rapeseed

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The qualitative event-specific polymerase chain reaction detection method of genetically modified (GM) RT73 rapeseed was developed based on the cloned 3 end flanking sequence of RT73 rapeseed integration. The specificity of the method for GM RT73 rapeseed was validated using several different GM rapeseed lines, GM maize lines, GM soybean line, non-GM rapeseed, and other non-GM crops. In this study, the developed method was validated through an interlaboratory study by 12 laboratories from 6 countries. The sensitivity of this method was evaluated using several mixed rapeseed meals with different GM RT73 rapeseed contents from 5.0 to 0.01 prepared by our laboratory. The evaluated results showed that all of the rapeseed endogenous reference high mobility group protein gene (HMG I/Y), figwort mosaic virus 35S (FMV 35S) promoter, and RT73 event-specific fragment could be detected from rapeseed samples at 0.1 (w/w) with a confidence level of more than 95. All results from the 12 laboratories indicated that the developed method could be considered fit for the detection and identification of GM RT73 rapeseed.
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Document Type: Research Article

Affiliations: 1: Shanghai Entry-Exit Inspection & Quarantine Bureau, GMO Detection Laboratory, 1208 Minsheng Rd, Shanghai 200135, People's Republic of China. 2: Shanghai Jiao Tong University, School of Life Sciences and Biotechnology, 800 Dongchuan Rd, Shanghai 200240, People's Republic of China. 3: Federal Institute for Risk Assessment, Thielallee 88-92, 14195 Berlin, Germany. 4: East China University of Science and Technology, Bio-Engineer College, 130 Meilong Rd, Shanghai 200237, People's Republic of China.

Publication date: November 1, 2007

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  • The Journal of AOAC INTERNATIONAL publishes refereed papers and reviews in the fields of chemical, biological and toxicological analytical chemistry for the purpose of showcasing the most precise, accurate and sensitive methods for analysis of foods, food additives, supplements and contaminants, cosmetics, drugs, toxins, hazardous substances, pesticides, feeds, fertilizers and the environment available at that point in time. The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better methods of preparing samples for analysis; collaborative studies substantiating the performance of a given method; statistical techniques for evaluating data. The Journal will also publish other articles of general interest to its audience, e.g., technical communications; cautionary notes; comments on techniques, apparatus, and reagents.
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