Figure 8

Phylogenetic distribution of gene/intron content (loss and gain) among eight asterids and two outgroups. The tree was inferred using the maximum likelihood (ML) method with the ‘GTRGAMMA’ evolutionary model under the rapid bootstrap algorithm (1000 replicates). Bootstrap support values > 50% are shown at nodes. The 24 genes include atp[1,4,6,8,9], ccm[B, C, Fc, Fn], cob, cox[1-3], matR, mttB, and nad[1, 2, 3, 4, 4L, 5, 6, 7, 9]. The cox1 introns have been lost in the ancestor of angiosperms.