1. Graduate student, postdoctoral research associate, professor, respectively, Department of Food Science and Human Nutrition, Iowa State University, Ames, IA 50011.
2. Currently, postdoctoral research associate, Whistler Center for Carbohydrate Research, Purdue University, West Lafayette, IN 47907.
3. Research geneticist and biologist, respectively, USDA-ARS, Corn Genetics Research Unit, Department of Agronomy, Iowa State University, Ames, IA 50011.
4. Currently, assistant professor, Department of Food Science, The Pennsylvania State University, University Park, PA 16802.
5. Professor, Department of Statistics, Iowa State University, Ames, IA 50011.
6. Corresponding author. Phone: 515-294-9688. Fax: 515-294-8181. E-mail: pjwhite@iastate.edu