1. State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Chengdu 611130 Sichuan China
2. Maize Research Institute Sichuan Agricultural University Chengdu 611130 Sichuan China
3. Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region Ministry of Agriculture Chengdu 611130 Sichuan China
4. Mianyang Academy of Agricultural Sciences Mianyang 621023 Sichuan China
5. Crop Characteristic Resources Creation and Utilization Key Laboratory of Sichuan Province Mianyang China
6. Department of Plant Breeding The Swedish University of Agricultural Sciences P.O. Box 190 SE‐23422 Lomma Sweden
7. College of Resources Sichuan Agricultural University Chengdu 611130 Sichuan China
8. International Maize and Wheat Improvement Center Texcoco Mexico