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Qualitative and quantitative event-specific PCR detection methods for oxy-235 canola based on the 3' integration
Litao Yang1, Jinchao Guo, Haibo Zhang
1GMO Detection Laboratory, SJTU-Bor Luh Food Safety Center, Ministry of Education, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
Journal of Agricultural and Food Chemistry
|February 27, 2008
Summary
This study developed specific PCR methods for identifying and quantifying genetically modified (GM) Oxy-235 canola. These validated assays accurately detect GM canola events down to 0.1%.
Area of Science:
- Agricultural Biotechnology
- Molecular Biology
- Genetics
Background:
- Event-specific PCR is crucial for identifying and quantifying genetically modified organisms (GMOs).
- Commercialization of genetically modified (GM) crops necessitates reliable detection methods.
Purpose of the Study:
- To develop and validate event-specific qualitative and quantitative PCR assays for GM canola Oxy-235.
- To identify the 3' flanking sequence of the exogenous DNA integration in Oxy-235 canola.
Main Methods:
- Thermal Asymmetric Interlaced PCR (TAIL-PCR) was used to reveal the 3' flanking sequence.
- PCR primers and a TaqMan probe were designed based on the identified sequence.
- Qualitative and quantitative PCR assays were established and validated.
Main Results:
- The 3' flanking sequence of Oxy-235 canola integration was successfully identified.
- Validated qualitative PCR assay showed a relative limit of detection (LOD) as low as 0.1%.
- Validated quantitative PCR assay demonstrated absolute LOD and LOQ of 10 and 20 copies of canola genomic DNA, respectively.
Conclusions:
- The developed PCR methods are suitable for the reliable identification and quantification of GM canola Oxy-235.
- These assays provide accurate detection in practical sample analyses.
- The study contributes to the safety and traceability of GM crops.
