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Published on: February 20, 2012
Development and evaluation of event-specific quantitative PCR method for genetically modified soybean A2704-12
Reona Takabatake1, Hiroshi Akiyama, Kozue Sakata
1Analytical Science Division, National Food Research Institute, National Agriculture and Food Research Organization, Ibaraki 305-8642, Japan.
Summary
A new real-time PCR method accurately quantifies the genetically modified soybean event A2704-12. This validated technique ensures reliable detection and measurement of this specific genetically modified organism (GMO) in soybean samples.
Area of Science:
- Agricultural Biotechnology
- Molecular Biology
- Analytical Chemistry
Background:
- Genetically modified (GM) crops require precise quantification methods for regulatory and commercial purposes.
- Event-specific detection is crucial for genetically modified soybean (GMS) event A2704-12 due to unique DNA integration.
Purpose of the Study:
- To develop and validate a novel real-time PCR method for event-specific quantification of GMS event A2704-12.
- To establish reliable analytical procedures for GMO detection and quantification.
Main Methods:
- Development of event-specific primers targeting pUC19-derived DNA sequences integrated into the A2704-12 genome.
- Construction of a standard plasmid using pBR322 for accurate quantification, avoiding non-specific signals observed with pUC19.
- Experimental determination of the conversion factor (C(f)) using Applied Biosystems 7900HT and 7500 real-time PCR instruments.
Main Results:
- The conversion factor (C(f)) was determined to be 0.98 across both real-time PCR instruments.
- Multi-laboratory blind trials validated the method's performance.
- The limit of quantitation was established at 0.1%, with bias and reproducibility (RSD(R)) both below 20%.
Conclusions:
- The developed real-time PCR method provides accurate and reliable event-specific quantification of GMS A2704-12.
- The method meets performance criteria for trueness and precision, making it suitable for practical GMO analysis.
- This analytical approach supports regulatory compliance and quality control for GMS A2704-12.
