Search

ObjectiveThe status of genetically modified ingredients in prepackaged food was investigated and analyzed， and the labeling system and practical use of genetically modified food in China was discussed.MethodsGB/T 38505—2020 General detection methods for genetically modified products were used to detect 5 genetically modified crops （soybean， maize， rape， rice， and potato） in processed products. Ten exogenous gene fragments of five crops that could cover all commercial genetically modified events were tested at one time.ResultsAmong the 42 products sampled， 6 batches of soybean products， 1 batch of potato products， and 3 batches of corn products containing genetically modified components were detected.ConclusionA certain proportion of genetically modified ingredients in the existing prepackaged food products can be detected， and this needs to be further regulated by a strict food labeling system.

In order to investigate and analyze whether transgenic soybean lines are mixed into conventional soybean breeding in China, 706 soybean lines were selected for PCR amplification of several regulatory elements (CaMV35S promoter, FMV35S promoter and NOS terminator), as well as the main herbicide tolerant transgenic soybean transformants (GTS40-3-2 and MON89788) approved for import in China. Meanwhile, a specific qualitative PCR detection method for soybean event (MON89788) was established and 5' and 3' flanking sequences were designed. The products of 445 bp and 340 bp were amplified by primers, which can be applied to the detection of MON89788 soybean. Finally, of all the samples selected, the proportion of transgenic components containing CaMV35S promoter, FMV35S promoter, NOS terminator and herbicide tolerant transgenic line MON89788 was 1%, 0.85%, 0.71% and 0.85% respectively, so as to evaluate the proportion of transgenic soybeans and provide consumers with the share of transgenic soybeans. To provide a strong basis for the agricultural genetically modified soybean regulatory authorities to carry out monitoring work to provide data support. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)