I M P R I N T E D R E T RO G E N E E VO L U T I O N Figure 3. Phylogenetic reconstruction for each gene family. Posterior probabilities for each branch are shown. ω values for the best-ﬁt site-speciﬁc model (Mcts and Nap1l families) and foreground and background for best-ﬁt lineage-speciﬁc model (Inpp5f_v2-Vma21 and U2af1-rs families) are shown. EVOLUTION MAY 2011 1 4 1 9