1. MOE Key Laboratory of Crop Heterosis and Utilization, National Maize Improvement Center of China China Agricultural University Beijing 100094 China
2. Maize Research Institute Jilin Academy of Agricultural Sciences Gongzhuling 136100 China
3. Key Laboratory of Soybean Molecular Design Breeding, Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130102 China
4. Sanya Institute of China Agricultural University Sanya 572025 China