Figure 2.

Phylogenetic relationships and RNAi susceptibility of nematode species. Phylogenetic relationships are redrawn from [32,33]. A indicates transition to animal parasitism. P indicates transition to plant parasitism. Susceptibility of each species to internal and external modes of RNAi administration is indicated on the right. A + sign indicates that RNAi has been successful, a – sign that it has not. A +/- sign indicates poor efficiency. ND, not determined. Colors of species name indicate the status of genome sequencing: green, published; orange, ongoing or planned; red, not planned. *I. Nuez and MAF, unpublished data.