Comparative analysis of the mitochondrial genome of from different regions in China.

Ticks are a group of blood-sucking ectoparasites that play an important role in human health and livestock production development as vectors of zoonotic diseases. The phylogenetic tree of single genes cannot accurately reflect the true kinship between species. Based on the complete mitochondrial genome analysis one can help to elucidate the phylogenetic relationships among species. In this study, the complete mitochondrial genome of (isolate Longyan) was sequenced and compared with the mitochondrial genes of 3 other Chinese isolates (Nanchang, Jinhua and Yingtan). In 4 isolates had identical or similar mitochondrial genome lengths and an overall variation of 0.76% between sequences. All nucleotide compositions showed a distinct AT preference. The most common initiation and stop codons were ATG and TAA, respectively. Fewer base mismatches were found in the tRNA gene of (isolate Longyan), and the vicinity of the control region and tRNA gene was a hot rearrangement region of the genus . Maximum likelihood trees and Bayesian trees indicate that is most closely related to . The results enrich the mitochondrial genomic data of species in the genus and provide novel insights for further studies on the phylogeographic classification and molecular evolution of ticks.