Unrooted neighbour-joining tree based on Cavalli-Sforza chord distance depicting relationships between different multilocus genotypes of <i>Nematus oligospilus</i>.

<p>Under the assumption that multilocus genotypes (MLGs) more interior in the network are the ancestors of more exterior ones on the same branch, inferred mutational changes are depicted on the branches, e.g. Wf21 (337→333) indicates that MLG NZ5 could have arisen most parsimoniously by a 4 base pair deletion of the Wf21<sup>337</sup> allele from an ancestor with the genotype of Main MLG.</p>