Genomic Insights into the Origin of Parasitism in the Emerging Plant Pathogen Bursaphelenchus xylophilus
Figure 5
Evolutionary dynamics of gene families in nematodes.
Phylogeny is a Bayesian nucleotide phylogeny based on 23 well-aligned single-copy genes present in all 10 species. Values on nodes are Bayesian posterior probabilities. Values on edges represent the inferred numbers of births (+) and deaths (−) of gene families along that edge. Note that our approach cannot distinguish gene family losses from gains on the basal branches of this tree, so for example the value of 1276 gene family gains on the Brugia lineage will include gene families lost on the branch leading to the other 9 spp., and similarly the 2282 gains on this branch will include Brugia-specific gene family losses. Pie charts in the centre represent the gene family composition of each genome – the area of the circle is proportional to the predicted proteome size, and the four wedges represent the relative numbers of proteins predicted to be either singleton genes (i.e. not members of any gene family), members of gene families common to all 10 sequenced Rhabditida genomes, and members of gene families present only in a single genome, and members of other gene families, present in between 2 and 9 genomes.