1. National Tobacco Gene Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, People’s Republic of China
2. Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, People’s Republic of China
3. Mudanjiang Tobacco Science Research Institute, Harbin, People’s Republic of China
4. Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Guangzhou, People’s Republic of China