Institution: | 1 U.S. Department of Agriculture, Agricultural Research Service, North Carolina Stale University Raleigh, NC 27695-7631, U.S.A.
2 Departments of Crop Science and Botany, North Carolina State University Raleigh, NC 27695-7631, U.S.A.
3 Phytotechnology Research Center and Department of Biological Sciences, Michigan Technological University 1400 Townsend Dr., Houghton, MI 49931-1295, U.S.A. |