Figure 1

Geographical distribution and magnitudes of migration routes of Cinnamomum kanehirae. In the upper panel, the flow of the Kuroshio Current is shown. In the bottom left panel, four geographic regions defined by Lin et al. [35] together with the location of populations are indicated. The northwestern region (NW) contains populations TP, KW, TH, and NC; the west-central region (WC) contains populations WC, CT, WH, and ALS; the southwestern region (SW) contains populations KS, HNS, FKS, and TN; and the southeastern region (SE) contains populations FL, HKL, CL, YL, CP, YF, and TML. Abbreviations of population codes are listed in Table 1. The dark area indicates elevations above 2000 m, and the gray area indicates the distribution range of C. kanehirae outside the area above 2000 m [26, 35]. HR, Huseshan Range; CMR, Central Mountain Ridge. In the bottom right panel, directions and magnitudes of gene flow estimated by the Bayesian approach are shown. Arrows indicate the direction of migration and the thickness of the arrows indicates values of the migration parameter (M) calculated by the computer software, MIGRATE 3.0 [54].