How does the PCR method for GMO detection work? An accurate testing solution for businesses

1. What is the PCR method?

- PCR (Polymerase Chain Reaction) is a molecular biology technique that helps amplify DNA targets millions of times, thereby allowing the presence of genetic material to be detected with very high accuracy.

👉 In food testing, PCR is applied to:

- Detect genetically modified DNA (GMO)

- Check the origin of raw materials

- Determine whether a product contains GMO or not

🧬 The principle of PCR in GMO detection

- The PCR process works by selectively copying the target DNA through thermal cycles:

* Main steps:

1. Denaturation

Separating the two DNA strands at high temperature

2. Annealing

The primer binds to the target GMO DNA segment

3. Extension

The enzyme synthesises new DNA

👉 After many cycles, the target DNA is strongly amplified → easy to detect.

2. What is the target DNA in GMO testing

In GMO testing, PCR does not look for the entire DNA but focuses on the characteristic segments of GMO, for example:

- Promoter 35S (from cauliflower mosaic virus)

- NOS terminator

- FMV promoter

👉 These are the “genetic traces” that help determine:

- Whether the product is GMO or not

- Which type of GMO it belongs to

3. Sensitivity and specificity of PCR

* High sensitivity

- Detects extremely small amounts of DNA

- Suitable for processed samples

* High specificity

- Accurately identifies each type of GMO

- Limits errors

This is why PCR is regarded as the: “Gold standard” in GMO testing

4. Applying PCR in real GMO testing

PCR is widely used in:

- GMO testing in soybean, corn, rice

- Control of animal feed

- Analysis of raw materials for export

- Testing in the QC lab

5. R-Biopharm's PCR solution for GMO testing

The PCR kits from R-Biopharm offer many benefits:

* Outstanding advantages:

- High accuracy, meeting international standards (AOAC, ISO)

- Simple process, easy to implement

- Fast analysis time

- Suitable for QC and laboratory

👉 Helps businesses:

- Ensure regulatory compliance

- Avoid export risks

- Enhance product reputation

⚠️ Notes when using PCR for GMO testing

- Ensure the sample DNA is not degraded

- Avoid cross-contamination during handling

- Control the PCR temperature precisely

- Use standard kits and equipment

6. Conclusion

- The PCR method is the most powerful and reliable tool in GMO testing by PCR, helping businesses control quality and meet the requirements of the international market.

- In an increasingly strict export environment, applying PCR is not only an advantage but also a mandatory factor for competing.