1. Department of Agronomy and Range Science, University of California, Davis, CA 95616, USA.
2. U.S. Department of Agriculture–Agricultural Research Service, Albany, CA 94710, USA.
3. Department of Biological Sciences, Michigan Technological University, Houghton, MI 49931, USA.
4. Purdue University Genomics Core, Purdue University, West Lafayette, IN 47907, USA.
5. Department of Genetics, University of Georgia, Athens, GA 30602, USA.