1. State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, National Yangling Agricultural Biotechnology & Breeding Center, Shaanxi Key Laboratory of Crop Heterosis, and College of Agronomy, Northwest A&F University , Yangling 712100, Shaanxi , China
2. Ningxia Agricultural Technology Extension Station , Yinchuan 750001, Ningxia , China