Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, P.R.China;
Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, P.R.China;
Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, P.R.China;
Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, P.R.China;
Agronomy Faculty, Sichuan Agricultural University, Chengdu 611130, P.R.China;
Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, P.R.China;