What does PBR mean in plants?

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Tags

1. #rights
2. #culture
3. #flowers
4. #divisions
5. #variety
6. #material
7. #foliage
8. #control
9. #including
10. #exclusive
11. #known
12. #propagating
13. #plant
14. #fruit
15. #breeder
16. #cuttings
17. #granted
18. #breeders
19. #tissue
20. #harvested