1. State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
2. University of Chinese Academy of Sciences, Beijing, China
3. USDA-ARS-MWA-Cereal Crops Research Unit, Madison, Wisconsin 53726
4. Arizona Genomics Institute, School of Plant Sciences, BIO5 Institute, University of Arizona, Tucson, Arizona 85721
5. Department of Horticulture, University of Wisconsin-Madison, Madison, Wisconsin 53706
6. Department of Plant Biology, Department of Horticulture, Michigan State University, East Lansing, Michigan 48824