CPC encourages practitioners to collect from the rarest plant populations as these have high extinction risk. Some of the rarest species may not have populations large enough to support a collection of 3000 seeds, the number of seeds for a collection suggested by National Laboratory for Genetic Resources Preservation (NLGRP). Note that 3000 seeds is a target, not a dictum. If you are lucky enough to make a collection of more than 3000 seeds, it will mean more seeds will be available for future uses. For collections of 100 to 3000+ seeds, follow the practices outlined in CPC Best Practices Section “Cleaning, Processing, Drying, and Packaging Seeds for Conventional Storage.” This section pertains to or those collections that have fewer than 100 seeds.
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IUCN seed specialist group. Accessed August 4, 2017.
Maunder, M., C. Huges, J. A. Hawkins, and A. Culham. 2004. Hybridization in ex situ plant collections: conservation concerns, liabilities, and opportunities. Pages 325–364 in Guerrant, E. O., Jr., K. Havens, and M. Maunder, editors. 2004. Ex situ plant conservation: supporting species survival in the wild. Island Press, Washington, DC.
Millennium Seed Bank Partnership (MSB). 2015. Seed conservation standards for “MSB Partnership Collections.” Royal Botanic Gardens, Kew, UK.
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U.S. Department of Agriculture. Forest Service. F. T. Bonner and R. Karrfalt, editors. 2008. The woody plant seed manual (No. 727). Government Printing Office, Washington, DC.
Willis, C. G., Baskin, C. C., Baskin, J. M., Auld, J. R., Venable, D. L., Cavender-Bares, J., Donohue, K., and Rubio de Casas, R. 2014. The evolution of seed dormancy: environmental cues, evolutionary hubs, and diversification of the seed plants. New Phytologist 203:300–309.