1. College of Forestry, Sichuan Agricultural University, Huimin Road 211, Wenjiang District 611130, Chengdu City, Sichuan Province, China.
2. Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, KW Neatby Bldg., Central Experimental Farm, 960 Carling Avenue, Ottawa, ON K1A 0C6, Canada.
3. Triticeae Research Institute, Sichuan Agricultural University, Huimin Road 211, Wenjiang District 611130, Chengdu City, Sichuan Province, China.