†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).