1. What are DUS Trials?

Imagine developing a revolutionary plant variety – a disease-resistant rice strain with exceptional yield or a drought-tolerant fruit tree with unparalleled flavor. In Vietnam's Plant Variety Rights (PVR) system, proving the distinctiveness, uniformity, and stability (DUS) of your creation is the cornerstone of obtaining protection. This is where DUS trials enter the scene, acting as a rigorous assessment process to validate your variety's uniqueness and consistency.

DUS Trials: Unveiling the Details

DUS trials are essentially a series of controlled tests conducted by qualified institutions. These trials meticulously evaluate a plant variety's characteristics to ensure it meets the eligibility requirements for PVR protection. Think of it as a scientific examination process that focuses on two critical aspects:

  • Distinctiveness: Is your variety truly one-of-a-kind? The trials determine if your creation can be clearly distinguished from any existing variety in Vietnam or elsewhere. Testers achieve this by comparing your variety to known varieties, and meticulously examining relevant characteristics like plant size, flower color, fruit shape, and other defining features.
  • Stability: Will your variety's unique traits remain unchanged over time? DUS trials go beyond simply identifying distinctiveness. They involve repeated propagation through prescribed methods, often over multiple generations. This meticulous process ensures that the variety's defining characteristics remain consistent and don't fluctuate significantly across reproductions.

In essence, DUS trials act as a guardian of innovation within the PVR system. They ensure that only truly novel and stable varieties are granted protection, fostering a robust and reliable agricultural sector in Vietnam.


2. Conducting DUS Trials in Vietnam

Obtaining Plant Variety Rights (PVR) protection in Vietnam requires navigating the DUS testing process. Here's a breakdown of the key steps involved:

1. Choosing the Right Authority:

In Vietnam, the National Office of Intellectual Property of Vietnam (NOIP) oversees DUS testing. However, they don't conduct the tests themselves. Thankfully, Vietnam boasts a network of designated DUS testing stations across the country. This will help applicants only have to submit the application to a single place to get their tests.

2. Selecting the Appropriate Station:

Each designated station specializes in testing specific plant species. You'll need to choose a station that possesses expertise in the type of plant variety you've developed. For instance, a station specializing in rice testing wouldn't be ideal for evaluating a new mango variety.

3. Preparing Your Application:

Contact your chosen testing station and inquire about their specific application procedures and requirements. This might involve submitting details about your variety, such as its origin, breeding history, and desired characteristics to be tested.

4. Trial Set-Up and Comparison:

Once your application is approved, the testing station will guide you through the trial process. This typically involves planting your candidate variety alongside reference varieties with well-known characteristics. This side-by-side comparison allows for a clear assessment of distinctiveness.

5. The Endurance Test: Assessing Stability

DUS trials go beyond a single planting season. To confirm stability, the testing station will propagate your variety through prescribed methods over a defined period, often spanning multiple generations. This meticulous process ensures the variety's unique traits remain consistent across reproductions.

6. Trial Duration:

The timeframe for DUS trials can vary significantly. Fast-growing plant species might complete trials within a single year, while others with longer growth cycles might require multiple years to reach conclusive results.

7. Receiving the DUS Test Report:

Upon successful completion of the trials, the testing station issues a DUS test report. This report is a crucial document in your PVR application process. It serves as evidence to the NOIP, demonstrating that your variety meets the distinctiveness and stability requirements for protection.


  • Consulting a Vietnamese intellectual property lawyer specializing in PVRs can be invaluable. They can guide you through the intricacies of DUS trials and ensure your application aligns with PVR eligibility criteria.

By following these steps and seeking expert advice, you can navigate the DUS testing process in Vietnam effectively and pave the way for securing PVR protection for your innovative plant variety.


3. Outcomes of DUS Trials

DUS trials in Vietnam's Plant Variety Rights (PVR) system play a pivotal role in determining the fate of your application. After the trials conclude, you'll receive a DUS test report, acting as the official verdict on your variety's distinctiveness and stability. Here's a closer look at the potential outcomes:

Favorable Outcome: Securing PVR Protection

The ideal scenario is receiving a DUS test report confirming both distinctiveness and stability. This report serves as a powerful piece of evidence for your PVR application with the NOIP (National Office of Intellectual Property of Vietnam). It demonstrates that your variety meets the key criteria for protection, significantly increasing your chances of obtaining PVRs. This is, of course, the best-case scenario, but you should be prepared for other not-so-fortunate outcomes, as follows:

Unfavorable Outcome: Reassessment and Next Steps

If the DUS test report reveals insufficient distinctiveness or stability, don't be discouraged. Here's how to proceed:

  • Understanding the Reasons: The testing station should provide a detailed explanation for the unfavorable outcome. This will help you identify areas where your variety might not have met the requirements.This will help you refine your program further.
  • Refining Your Breeding Program: Based on the feedback, you can revisit your breeding program and make necessary adjustments to enhance the distinctiveness or stability of your variety. This might involve further selection within your existing breeding lines or potentially incorporating new genetic material.
  • Repeat Testing: Once you've made improvements, you can consider re-submitting your variety for DUS testing. This allows you to demonstrate that your efforts have addressed the initial shortcomings.

Seeking Expert Advice:

In any case, you should consider consulting with a Vietnamese IP lawyer. Consulting a Vietnamese intellectual property lawyer specializing in PVRs can be invaluable in navigating an unfavorable DUS test report. They can:

  • Analyze the Report: They can help you interpret the test results and identify potential reasons for the outcome, which help develop potential strategies
  • Develop Strategies: Your lawyer can advise on strategies for refining your breeding program or exploring alternative approaches to enhance your variety's distinctiveness or stability. This will help guide the re-application process.
  • Guide the Re-application Process: If you decide to re-submit your variety for testing, your lawyer can guide you through the application process and ensure it aligns with PVR requirements.

Remember: DUS trials are a crucial step in securing PVR protection. While an unfavorable outcome might require additional work, it's not an insurmountable obstacle. By understanding the process, seeking expert advice, and making necessary adjustments, you can increase your chances of obtaining PVRs and safeguarding your innovative plant variety in Vietnam


4. Additional Considerations

DUS trials are a vital step in securing Plant Variety Rights (PVR) protection for your creation in Vietnam. However, beyond the core testing process, there are some additional factors to consider for a smooth and successful journey:

  • Cost Considerations: DUS trials come with associated costs. These can vary depending on several factors, as listed below:
    • Plant Species: Testing complex or less common plant varieties might require more specialized expertise and resources, potentially increasing the cost.
    • Testing Complexity: The specific procedures and analyses involved in the trials can influence the overall cost. 
    • Trial Duration: Fast-growing plants with shorter trial periods might be less expensive compared to varieties requiring multiple growing seasons for conclusive results.
  • Planning for Success: Early consultation with a Vietnamese intellectual property lawyer specializing in PVRs is highly recommended. This can potentially:
    • Assess Your Variety: They can help you evaluate your variety's potential for meeting PVR eligibility criteria, including distinctiveness and stability.
    • Guide Through the Process: Your lawyer can navigate you through the DUS testing process, ensuring you choose the appropriate station and understand the application procedures.
    • Minimize Costs: By strategically planning your DUS trials, your lawyer can help you optimize costs while ensuring you meet all the necessary requirements.
  • International Recognition (optional): In some cases, international DUS test reports might be accepted by the NOIP, potentially reducing the need for local testing in Vietnam. However, this depends on agreements between Vietnam and the country that issued the report. Here's what to consider:
    • Validity of International Reports: Not all international reports are automatically accepted. Consult the NOIP for a list of recognized countries and their specific requirements.
    • Translation Requirements: If an international report is accepted, it might need to be translated into Vietnamese by a certified translator.
    • Cost-Effectiveness: Evaluate the cost of obtaining an international report compared to local testing in Vietnam. In some cases, local testing might be more cost-effective.

5. Conclusion

DUS trials are an essential yet sometimes daunting step in securing Plant Variety Rights (PVR) protection for your creation in Vietnam. By understanding the process – from choosing the right testing station to interpreting the outcomes – you can navigate the system with confidence.

Remember, DUS trials are not just an obstacle, but a valuable validation process. A successful DUS trial strengthens your PVR application and paves the way for recognition and reward for your innovation. Consulting with a Vietnamese intellectual property lawyer specializing in PVRs can be your key ally throughout this process. Their expertise can help you optimize costs, ensure proper testing procedures, and ultimately, increase your chances of securing PVR protection for your plant variety.

So, embrace DUS trials as a crucial step in your journey. With careful planning, expert guidance, and a deep understanding of the system, you can transform your innovative plant variety into a protected asset, contributing to the growth and prosperity of Vietnam's agricultural sector.

If you need further explanation on this subject, please don't hesitate to contact us through email at lienhe@luatminhkhue.vn or phone at: +84986 386 648. Lawyer To Thi Phuong Dzung.