1. State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100083, China
2. National Maize Improvement Center of China, Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100083, China
3. College of Biological Science and Technology, Shenyang Agricultural University, Shenyang 110866, China
4. Broad Institute of MIT and Harvard University, Cambridge, Massachusetts 02142
5. Department of Plant Biology, University of Georgia, Athens, Georgia 30602
6. School of Integrative Plant Science, Cornell University, Ithaca, New York 14853