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(A) Haplotype network of all four Chinese beeches; the black, white, green, and red colors represent F. lucida, F. longipetiolata, F. engleriana, and F. hayatae, respectively; (B) and (C) haplotype distribution in the studied populations of Fagus lucida and F. longipetiolata, respectively. The insets in (B) and (C) show the branches with capsules of each species.
