Establishment of a screening method for genetically modified potatoes using multiplex PCR.

Area of Science:

• Agricultural Biotechnology
• Food Safety
• Molecular Biology

Background:

• Global increase in genetically modified (GM) potato commercialization necessitates robust import regulations.
• Korea maintains a strict zero-tolerance policy for unauthorized GM potatoes due to lack of authorization.

Purpose of the Study:

• To develop and validate a highly specific and sensitive screening method for unauthorized GM potatoes in Korea.
• To ensure compliance with import regulations and protect the food supply.

Main Methods:

• Development of a multiplex PCR screening method targeting key genes (UGPase, T-Nos, Innate-construct, AV43-6-G7) from 51 GM potato events.
• Validation of specificity against 6 GM potato events and 13 non-GM crops.
• Assessment of sensitivity with a detection limit of 0.05% and applicability in processed food samples.

Main Results:

• The multiplex PCR method demonstrated high coverage and specificity for detecting GM potato events.
• Sensitivity analysis confirmed a low detection limit of 0.05%.
• The method was successfully applied to detect unauthorized GM potatoes in processed food samples, including a spiked sample.

Conclusions:

• The developed GM potato-specific screening method is effective for detecting and managing unauthorized events.
• This method supports Korea's zero-tolerance policy and regulatory requirements for imported food products.