Figure 4
From: Sex, bugs and Haldane's rule: the nematode genus Pristionchus in the United States
Phylogenic maximum likelihood tree based on SSU sequences of the genus Pristionchus. As outgroup the sequence of Koerneria sp. was included as the closest related genus to Pristionchus. A single best tree was obtained using the Kimura 2-parameter model (Kimura 1980) with Ts/Tv = 1,4727, equal base frequencies, and a γ-correction with shape parameter α = 0,2381. Numbers at nodes indicate bootstrap values after 1000 replications. E, species observed in Western Europe; A, species observed in North-America (this study).