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Cryopreservation is an effective and efficient strategy for the long-term conservation of clonally propagated crops. Plant material is stored at ultra-low temperatures in the vapor or liquid phase of liquid nitrogen (-196°C) and at this temperature physiological, chemical, and metabolic activities slow to an extremely low rate. Germplasm can theoretically remain viable for centuries. CIP began cyroperserving potatoes in 1996 and after experimenting with a wide range of protocols and variables, the CIP genebank adopted the PVS2-droplet method, originally developed for the Musa (banana) collection. The CIP genebank has improved the protocol where to date the genebank successfully cryopreserves >450 potato accessions per year (Link to potato OP).