Fig. 2

Median-Joining network of 28 COI haplotypes observed in 332 Rhipicephalus appendiculatus ticks. The network was based on the polymorphic sites in the 558 bp COI gene segment. Each circle represents a haplotype and the area of the circle is proportional to the haplotype frequency. Numbers represent nucleotide position. Colours represent a group of tick populations classified on the basis of the origin of the sequences: blue, laboratory stocks; yellow, populations sampled from pastures grazed by wildlife; red, populations sampled from pastures grazed by both cattle and wildlife; green, populations sampled from cattle pastures. Median vectors are represented by “mv”