This spring, Bejo Zaden BV in Warmenhuizen acquired plant breeders’ rights for the True Potato Seed (TPS) Oliver variety. This raises the question of how the plant breeders’ rights protocol has been adapted for this TPS variety. Lysbeth Hof and Jan Kees Schipper of Naktuinbouw (the Netherlands Inspection Service for Horticulture) answer this question. They also look forward to a possible admission of TPS material on the National Varieties List.


Jaap Delleman


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