Stephanie is a Supervisory Plant Physiologist and lead scientist of the Plant Preservation Program at the USDA Agricultural Research Service Plant and Animal Genetic Resources Preservation Unit. Dr. Greene is responsible for providing long term storage of the USDA National Plant Germplasm System Base seed collection. The Base collection serves as a safety back up of our Nation’s seed collection, and contains over 560,000 accessions. We also provide safety back up for domestic and international seed and microbe collections, including housing and distributing the CPPSI plant pathogen sets. Dr. Greene’s main research focus is the conservation of crop wild relative species that are native to the United States. These wild species are important genetic resources that can be used by breeders to develop productive, climate-resilient crops. She also leads a team assessing the escape of genetically-engineered genes from alfalfa into the environment to better understand transgene dispersal and possible strategies to prevent escape.