1. State Key Laboratory of Plant Physiology and Biochemistry, National Maize Improvement Center of China, MOA Key Laboratory of Maize Biology, Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing 100193 China
2. Maize Research Center Beijing Academy of Agriculture and Forestry Sciences Beijing 100097 China
3. National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University Wuhan 430070 China