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Usefulness of Expired Proprietary (Ex-PVP) Maize (Zea Mays L.) Germplasm for U.S. Northern Breeding Programs
(North Dakota State University, 2014)
Maize (Zea mays L.) inbred lines and hybrids are protected by U.S. Patent and/or Plant Variety Protection Act (PVPA). Protection lasts 20 years and it affects breeding access in a highly confidential and competitive market. ...