1. Department of Plant Genetics and Breeding College of Agronomy and Biotechnology China Agricultural University Beijing China
2. Beijing Key Laboratory of Crop Genetic Improvement and Genome Ministry of Agriculture Beijing China
3. Forage Crop Research Institute Japan Grassland Agricultural and Forage Seed Association Nasushiobara Tochigi Japan
4. Institute of Animal Science Jiangsu Academy of Agricultural Sciences Nanjing China
5. Agronomy Department University of Florida Gainesville Florida USA