Event-specific PCR methods to quantify the genetically modified DBN9936 maize
2022
Abstract The genetically modified (GM) maize DBN9936 that has been granted a biosafety certificate needs to be regulated in China. An event-specific PCR assay targeting the junction region between the left border of its T-DNA and the flanking genomic DNA (gDNA) was established to be able to specifically identify the DBN9936 event from other GM maize and non-GM maize. Both qPCR and duplex ddPCR achieved accurate measurement of DBN9936 content in blind matrix and gDNA samples with acceptable precision in terms of a relative standard deviation (RSD) of
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