Development of a screening method for genetically modified soybean by plasmid-based quantitative competitive...

Area of Science:

• Biotechnology
• Molecular Biology
• Food Safety

Background:

• Accurate quantification of genetically modified organisms (GMOs) like Roundup Ready soybean (RRS) is crucial for regulatory compliance and food safety.
• Existing real-time PCR methods for RRS quantification require specific validation and can be complex.
• A need exists for simpler, more stable, and precise methods for GMO detection.

Purpose of the Study:

• To develop a novel quantitative competitive polymerase chain reaction (QC-PCR) system for detecting and quantifying RRS.
• To establish a plasmid-based competitor molecule for enhanced precision and stability in GMO quantification.
• To provide a feasible alternative to existing real-time PCR methods for RRS analysis.

Main Methods:

• Development of a novel QC-PCR system utilizing a constructed plasmid as a competitor molecule.
• The competitor plasmid contains both RRS-specific and taxon-specific (lectin1) sequences with unique insertions.
• Plasmid DNA was employed as a reference molecule for precise target copy number adjustment, replacing traditional ground seeds.

Main Results:

• The developed plasmid-based QC-PCR system demonstrated effective detection and quantification of RRS.
• The use of plasmid DNA as a reference molecule ensured precise and stable adjustment of target copy numbers.
• The novel method proved to be a simple and feasible alternative for quantifying GMO content.

Conclusions:

• A novel plasmid-based QC-PCR system offers a robust method for RRS detection and quantification.
• This approach provides enhanced precision and stability compared to traditional methods.
• The developed QC-PCR system is a viable and simpler alternative for routine GMO analysis.