Department of Agronomy, Purdue University, 915 W. State St., Lilly Hall, West Lafayette, IN, 47907, USA.|Department of Plant Science, University of California, 3134 Batchelor Hall, Riverside, CA, 92521, USA.|Department of Animal Science, Purdue University, 915W. State St., Lilly Hall, West Lafayette, IN, 47907, USA.|Department of Agronomy, Purdue University, 915 W. State St., Lilly Hall, West Lafayette, IN, 47907, USA. krainey@purdue.edu.