Characterization of the Intergenic Spacer rDNAs of Two Pig Nodule Worms, Oesophagostomum dentatum and O. quadrispinulatum

Figure 2

Phylogenetic relationships of Oesophagostomum and O. quadrispinulatum isolates inferred by neighbor-joining (NJ) method with model of Kimura 2-parameter based on sequences of intergenic spacer rDNA (IGS rDNA). Bootstrap values (in %) above 50% from 1000 pseudoreplicates are shown for the NJ analyses. Scale bar indicates an evolutionary distance of Kimura 2-parameter methods.