Figure 1

Distribution of the 11 germplasms used for the research in China. Different symbols represent different species. Each germplasm was labelled with specimen IDs as follow: C. sinensis (GP) (SWH190512), C. speciosa (ZPLY) (SWH190535), C. speciosa (ZPXC) (SWH190621), C. speciosa (ZPCA) (SWH190657), C. speciosa (ZPLP) (SWH190645), C. thibetica (XZ) (SWH190805), C. thibetica (XZSS) (SWH190823), C. thibetica (MYXZ) (SWH190837), C. cathayensis (MY) (SWH190711), C. japonica (RB) (SWH190527), and D. delavayi (DY) (SWH190726). All of the germplasms were identified by Professor J.M.J. The map was downloaded on https://www.tianditu.gov.cn/.