Property rights and exclusive ownership of the plant variety. PVP covers all harvested plant material, not just seed. Owners will have additional data gathering and administrative costs. A patent is only as strong as the willingness to defend it. If infringement occurs, considerable legal costs can be incurred pursuing the case.
Royalties can generate research funds for breeding or other programs.
With PVP, the private company has to pay the university for the right to use and modify the variety. While this could generate income for the university, it is likely the private seed companies will pass the cost on to growers in the form of higher seed prices. It has been suggested that the Variety Release Committee will recommend public or protected release on a case by case basis. This issue is still being discussed. The PVP holder may charge royalties, but is not required to.