Title |
Event-specific detection of transgenic potato AV43-6-G7 using real-time and digital PCR methods
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Published in |
BMC Biotechnology, October 2016
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DOI | 10.1186/s12896-016-0303-8 |
Pubmed ID | |
Authors |
Hongwei Gao, Xiaofan Yu, Tingting Deng, Min Sun, Xizhi Xiao, Xin Huang, Ying Chen, Ronggui Li |
Abstract |
The isolation of unknown DNA sequences flanked by known sequences is an important task in the event-specific detection of GMOs. None of event-specific detection method was developed based on the junction sequence of an exogenous integrant in the transgenic potato AV43-6-G7. The flanking sequence between the exogenous fragment and recombinant chromosome of this potato was successfully acquired through exogenous gene 5'-RACE. The event-specific primers and Taqman probe were designed to amplify fragments spanning the exogenous DNA and potato genomic DNA. The specific real-time PCR and digital PCR detection methods for AV43-6-G7 potato were established based on primers designed according to the flanking sequences. The detection limit of the qualitative PCR assay was 0.01 % for AV43-6-G7 potato in 100 ng of potato genomic DNA, corresponding to approximately 11.6 copies of the potato haploid genome. The ddPCR assays for Potato AV43-6-G7 achieved a limit of quantification of approximately 58 target copies, with RSD ≤ 25 %. The aLOQ of this system was approximately 1.2 copies. These results indicated that these event-specific methods would be useful for the identification of potato AV43-6-G7. |
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