College of Horticulture Sichuan Agricultural University Chengdu 611130 P.R.China;
College of Horticulture Sichuan Agricultural University Chengdu 611130 P.R.China;
College of Horticulture Sichuan Agricultural University Chengdu 611130 P.R.China;
College of Horticulture Sichuan Agricultural University Chengdu 611130 P.R.China;
College of Horticulture Sichuan Agricultural University Chengdu 611130 P.R.China;
Sichuan Academy of Forestry Chengdu 610081 P.R.China;