1. Laboratory of Poplar Breeding, Liaoning Institute of Poplar Research, Yingkou, China
2. Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
3. Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
4. Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China