1 Institute of Environmental Horticulture, Guangdong Academy of Agricultural Sciences, Guangzhou, China.
2 Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou, China.
3 Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Forestry University, Beijing, China.
4 Beijing Laboratory of Urban and Rural Ecological Environment, Engineering Research Center of Landscape Environment of Ministry of Education, Beijing Forestry University, Beijing, China.
5 Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, China.
6 The New Zealand Institute for Plant & Food Research Limited, Palmerston North Research Centre, Palmerston North, New Zealand.