College of Agronomy Northeast Agricultural University Harbin 150030 P.R.China;
College of Agronomy Northeast Agricultural University Harbin 150030 P.R.China;
Institute of Crop Sciences Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China;
College of Agronomy Northeast Agricultural University Harbin 150030 P.R.China;
College of Agronomy Northeast Agricultural University Harbin 150030 P.R.China;