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dN and dS trees for accD, matK, and rbcL gene. Branch lengths are in terms of dN and dS as estimated by PAML under a constrained topology. The topology of the accD dN tree, accD dS tree, rbcL dN tree, rbcL dS tree were identical to each other. The matK dN tree and dS tree were similar with rbcL and accD trees after removing C. hainanensis. The gray boxes denote the branch whose dN or dS has been accelerated.
