1. Institute of Crop Germplasm Resources, Shanxi Academy of Agricultual Sciences, Taiyuan, Shanxi, China;
2. Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau, Ministry of Agriculture, Taiyuan, Shanxi, China;
3. Shanxi Key Laboratory of Genetic Resources and Genetic Improvement of Minor Crops, Taiyuan, Shanxi, China;
4. Ningxia University, School of Life Science, Yinchuan, Ningxia, China