1. College of Forestry Northwest A&F University Yangling Shaanxi China
2. State Key Laboratory of Conservation and Utilization of Subtropical Agro‐Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture South China Agricultural University Guangzhou Guangdong China