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. 2016 Jun 6;17(8):1265–1275. doi: 10.1111/mpp.12402

Figure 1.

Figure 1

Phylogenetic analysis and genetic structure of the C‐terminally‐encoded peptide (CEP) gene family in Rotylenchulus reniformis. (A) Schematic diagram of the local phylogenetic neighbourhood of sedentary plant‐parasitic nematodes, including the only two CEP‐containing genera. Rotylenchulus reniformis has a distant phylogenetic relationship and an independent origin of biotrophic parasitism to the only other CEP‐containing nematodes, with many intermediate species that lack CEPs (van Megen et al., 2009). (B) Using a mid‐point re‐routed Bayesian phylogeny, all CEP sequences cloned to date from R. reniformis genomic DNA can be grouped into several distinct clades based on an alignment of complete genomic sequences. A representative genetic structure of the sequences in each clade identifies a large variation in CEP domain number and arrangement. Despite the diversity, CEP domain motifs are highly similar between clades. Unlike CEPs from all other organisms (Bobay et al., 1994; Delay et al., 2013), those of R. reniformis all contain at least one intron. Numbers correspond to base position; signal peptides (blue), CEP domains (red) and stop codons (black) are indicated. *Indicates RrCEP1 for further study.