1. College of Agronomy, Northeast Agricultural University, 600 Changjiang Road, Harbin, Heilongjiang 150030, P. R. China
2. Industrial Crop Research Institute, Heilongjiang Academy of Agricultural Sciences, 368 Xuefu Road, Harbin, Heilongjiang 150086, P.R. China
3. College of Agronomy and Life Sciences, Zhaotong University, 1 Guoxue Road, Zhaotong, Yunnan 657000, P.R. China
4. Fredericton Research and Development Centre, Agriculture and Agri-Food Canada, 95 Innovation Road, Fredericton, New Brunswick E3B 4Z7, Canada