1. Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, National Engineering Laboratory for Forest Tree Breeding, Beijing Forestry University, Beijing, China 100083; and Magnolia wufengensis Research Center, Beijing Forestry University, Beijing, China 100083
2. Forestry Science Research Institute of Wufeng County, Wufeng, Hubei Province, China 443400
3. Jiawang Branch of Xuzhou Natural Resources and Planning Bureau, Xuzhou, Jiangsu Province, China 221011
4. Magnolia wufengensis Research Center, Beijing Forestry University, Beijing, China 100083; and Key Laboratory for Silviculture and Conservation of the Ministry of Education, College of Forestry, Beijing Forestry University, Beijing, China 100083