First letter is the initial letter of the species name, second letter is the ecotype abbreviation of the Hahajima and Mukojima Islands for C. subpubescens , and last lowercase letter is the initial letter of the island’s name; Sugai et al. (2019); §Setsuko et al. (2023).
Figure legends
Fig. 1 Results of ADMIXTURE analysis performed on 89 individuals from 14 populations of the Bonin Islands using denovo dataset. The cross-validation (CV) error values for each run (a) and bar plots depicting the genetic admixture proportions for K = 2–8. Vertical columns represent individuals; heights of bar plots are proportional to the posterior means of the estimated admixture proportions.
Fig. 2 Neighbor-net network tree reconstructed using 89 individuals from 14 populations (a) and 82 individuals from 13 populations (excluding ecotype SH, b) of the Bonin Islands and two outgroup individuals using the referenced dataset. Phylogenetic clade colors correspond to those used in Figs. 1 and 3.
Fig. 3 Phylogenetic tree of analysis inferred from Mr. Bayes using 30 individuals from 14 populations (a) and 28 individuals from 13 populations (excluding ecotype SH, b) of the Bonin Islands and two outgroup individuals using the referenced dataset. Phylogenetic clade colors correspond to those used in Figs. 1 and 2.
Fig. 4 Best (a) six- and (b) five-ecotype divergence models. These correspond to models e1 and g2 in Fig. S2, respectively. Period shown in dashed lines assumes migration between ecotypes. Direction of migration shows the movements of individuals (i.e., forward-in-time). Ecotype colors correspond to those used in Figs. 1–3.
Fig. 5 Distributions of the first and third principal components (pc1 and pc3) for eleven leaf morphological traits of seven species/ecotypes (a), and those of the second and third principal components (pc2 and pc3) for ecotypes of eleven leaf morphological traits of five species/ecotypes (ecotypes P and SD are masked) (b).