1. Maize Research Institute State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region Ministry of Agriculture Sichuan Agricultural University Wenjiang Sichuan China
2. Department of Agronomy Iowa State University Ames IA USA
3. College of Agronomy Sichuan Agricultural University Wenjiang Sichuan China
4. State Key Laboratory of Crop Biology Shandong Key Laboratory of Crop Biology Shandong Agricultural University Tai'an Shandong China