1. Maize Research Institute, Sichuan Agricultural University , Wenjiang 611130, Chengdu, Sichuan , China
2. College of Grassland Science and Technology, Sichuan Agricultural University , Wenjiang 611130, Chengdu, Sichuan , China
3. Sichuan Rural Science and Technology Development Center, Science and Technology Department of Sichuan Province , Wuhou 610041, Chengdu, Sichuan , China
4. Rice Research Institute, Sichuan Agricultural University , Wenjiang 611130, Chengdu, Sichuan , China