Phylogenetic relationships of major clades of Asteraceae and phylogeny of the FDS gene family. (A) Phylogenetic relationships of major clades of Asteraceae modified from the Figure 1 of Panero & Funk . Bold branches indicate those most likely for the duplication event in the CDS family. (B) Phylogeny of the FDS gene family reconstructed by the ML method. Numbers next to branches are bootstrap percentages from Maximum Likelihood analysis, and posterior probabilities from Bayesian analysis. The accession numbers of each sequence are given in Additional file 2. The arrows indicate the duplication events. The asterisks indicate sequences that were not used in the codon-based analysis because of their incomplete coding regions. The colors indicate the tribes to which the species belong.