国家林业局植物新品种DUS测试指南专项2014036;上海市绿化和市容管理局辰山专项G142438。This work was supported by the Special Project for DUS Test Guidelines of New Varieties of Plants of the State Forestry AdministrationGrant 2014036;Special Project of Chenshan from Shanghai Administration Department of Afforestation and City AppearanceGrant G142438