1. Dep. of AgronomyIowa State Univ. Ames IA 50011-1010 USA
2. Crop Research InstituteAnhui Academy of Agric. Sciences Hefei Anhui P.R. China
3. Dep. of Crop ScienceObihiro Univ. of Agric. and Veterinary Medicine Inada Obihiro Hokkaido Japan
4. Dep. of Genetics, Development and Cell Biology, and Bessey Microscopy FacilityIowa State Univ. Ames IA 50011-1020 USA
5. USDA-ARS-CICGR and Dep. of AgronomyIowa State Univ. Ames IA 50011-1010 USA
6. G301 Department of AgronomyIowa State University Ames Iowa 50011-1010 USA