Industrial Crop Research Institute Yunnan Academy of Agricultural Sciences Kunming 650205 P.R.China;
College of Agronomy and Biotechnology Yunnan Agricultural University Kunraing 650201 P.R.China;
Yunnan Tobacco Research Institute Yuxi 653100 P.R.China;
Xishuangbanna Tropical Botanic Garden Chinese Academy of Sciences Kunming 650223 P.R.China;