Fig. 1

A species tree reconstructed from 210 single-copy genes using a summary method. a Diploid plant of Kalanchoë fedtschenkoi. b Individual maximum-likelihood gene trees were reconstructed from the CDS alignments for each of the 210 single-copy-gene ortholog groups using RAxML78, and the species tree was summarized from the gene trees using ASTRAL-II79. Pie graphs on nodes represent the proportion of gene trees that support the various quartets at every node, with red for the main topology shown in this tree, blue for the first alternative, and green for the second alternative, respectively. Quartet frequencies displayed in pie graphs and the posterior-probability at each node are calculated by ASTRAL-II79