A variety is eligible for protection when it confirms the

A variety is eligible for protection when it confirms Novelty, Distinctness, Uniformity and stability.
Plant variety protection provides legal protection of a plant variety to a breeder in the form of Plant Breeder's Rights (PBRs). PBRs are intellectual property rights that provide exclusive rights to a breeder of the registered variety.
The temperature fluctuation at any one point is called stability, and the largest temperature difference between any two points in the bath is called uniformity. The temperature at any point varies regularly between two limits but occasionally a larger variation is observed.