1. Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, Beijing 100083, China
2. National Engineering Research Center for Floriculture, Beijing 100083, China
3. Beijing Laboratory of Urban and Rural Ecological Environment, Beijing 100083, China
4. Engineering Research Center of Landscape Environment of Ministry of Education, Beijing 100083, China
5. Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, Beijing 100083, China
6. School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China