Contact for information?

Do you have a question when applying for Plant Breeders’ Rights or registration? Please contact us at or

Telephone number:

+31 (0)71 332 6137

You can also go to the contactpage (click here)


Board for Plant Varieties

Visiting address:

Sotaweg 22, 2371 GD Roelofarendsveen, The Netherlands


Postal address:

P.O. Box 14, 2370 AA Roelofarendsveen, The Netherlands


Bankaccount: IBAN: NL82RABO0300017057

Technical DUS-test

After the aforementioned administative tests, the DUS test begins.

In the technical DUS test Naktuinbouw establishes if the new variety is clearly distinguishable from all other existing varieties within the specie concerned (Distinct), whether the variety remains uniform during propagation (Uniform) and whether the characteristics of the variety remain stable during repeated propagation (Stable). In field tests and greenhouse tests, Naktuinbouw investigates individual plants of the variety and of the comparison varieties. For determination of distinctness Naktuinbouw uses panels of experts or walking reference collections. Naktuinbouw investigates applications for Dutch Plant Breeders' Rights (for the Board for Plant Varieties) as well as applications for European Plant Breeders' Rights (for the CPVO).

Send samples on time and correctly

It is important that a sample of a new variety is submitted in time - before the start of a new season. A closing date or submission period applies for each specie.
The sample must meet a number of demands, such as the nature of the material, the size of the sample and the health status. Seed must not have been treated, unless with express prior permission Seed may never be pelleted or primed, as these treatments can mask the characteristics of the seed and influence the germinating power, and therefore subsequent specie development.
Attention: although Naktuinbouw performs the technical DUS tests for EU Plant Breeders' Rights, the closing dates and conditions set by the CPVO may differ from those stated here. The website of the CPVO states the submission requirements for applications for European Plant Breeders' Rights in the S2 publication.
If the identity sample is not submitted in time or fails to meet these demands, the Board for Plant Varieties will automatically withdraw the application. 

New characteristic - tell us at once

Naktuinbouw performs tests according to CPVO protocols (Community Plant Variety Office), UPOV-directives (International Union for the Protection of New Varieties of Plants) or National protocols.
Does the distinctness of a new variety depend on a characteristic that has not already been included in one of these protocols? Please report this when submitting the application. Normally, being able to work with a new characteristic requires permission in a separate procedure. This is time consuming and delays the granting of Plant Breeders' Rights if this is only made known at a later stage.

During the test

Technical DUS testing usually takes one growing cycle. A growing cycle is the time the test takes to observe all the characteristics which are required for the DUS test. The final report usually follows after the first growing cycle. If there are still any aspects that are not clear, an extra growing cycle may be necessary. The applicant will receive an interim report stating the current status and the plans for the next growing cycle. Test fees will be charged for each growing cycle.
Naktuinbouw will invite the applicant to come and visit the trial. If Naktuinbouw encounters any problems during the test, the applicant will be informed at once.