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(A) NJ-P tree estimated by using the nine-gene combined noise-reduced dataset. (B) Comparison of method-dependent bootstrap support (BP) for the two alternative roots of basal angiosperm phylogeny (see Fig. 4A) the nine-gene combined dataset before and after noise reduction was used. (C) Comparison of bootstrap support for the two roots when independent genomic compartments before and after noise reduction were used.
