1. State Key Laboratory of Plant Physiology and Biochemistry and National Maize Improvement Center Department of Plant Genetics and Breeding China Agricultural University Beijing 100193 China
2. State Key Laboratory of Plant Physiology and Biochemistry College of Biological Sciences China Agricultural University Beijing 100193 China
3. State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing 100101 China
4. Waksman Institute of Microbiology Rutgers University Piscataway NJ 08854‐8020 USA
5. Center for Crop Functional Genomics and Molecular Breeding China Agricultural University Beijing 100193 China