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Analysis of complete mitogenomes and phylogenetic relationships of Frontopsylla spadix and Neopsylla specialis
Yafang Liu1, Bin Chen1, Xinyan Lu1
1Integrated Laboratory of Pathogenic Biology, College of Preclinical Medicine, Dali University, Dali, China.
Abstract:
Fleas represent a group of paramount medical significance, subsisting on blood and acting as vectors for an array of naturally occurring diseases. These pathogens constitute essential elements within the plague biome, exerting deleterious effects on both human and livestock health. In this study, we successfully assembled and sequenced the whole mitochondrial genome of Frontopsylla spadix and Neopsylla specialis using long-range PCR and next-generation sequencing technologies. The mitogenomes of F. spadix and N. specialis both have 37 genes with full lengths of 15,085 bp and 16,820 bp, respectively. The topology of the phylogenetic tree elucidates that species F. spadix is clustered in a branch alongside other members of the family Leptopsyllidae, whereas species N. specialis is a sister taxon to Dorcadia ioffi and Hystrichopsylla weida qinlingensis. It also suggests that Pulicidae form a monophyletic clade, Ctenopthalmidae, Hystrichopsyllidae, Vermipsyllidae form a sister group to Ceratophyllidae/Leptopsyllidae group. The mitochondrial genomes of F. spadix and N. specialis were sequenced for the first time, which will contribute to a more comprehensive phylogenetic analysis of the Siphonaptera order. The foundation for subsequent systematic studies, and molecular biology of fleas was established.
Insights
The whole mitochondrial genomes of fleas Frontopsylla spadix and Neopsylla specialis were sequenced for the first time. This research provides crucial data for understanding flea evolution and their role as disease vectors.
Area of Science:
- Genomics
- Evolutionary Biology
- Medical Entomology
Background:
- Fleas are medically significant, acting as vectors for diseases and impacting human and livestock health.
- Understanding flea phylogeny is crucial for disease control and public health initiatives.
Purpose of the Study:
- To sequence and assemble the complete mitochondrial genomes of Frontopsylla spadix and Neopsylla specialis.
- To contribute to a comprehensive phylogenetic analysis of the order Siphonaptera.
Main Methods:
- Whole mitochondrial genome sequencing using long-range PCR and next-generation sequencing.
- Bioinformatic analysis for genome assembly and gene content determination.
- Phylogenetic tree construction to infer evolutionary relationships.
Main Results:
- Successfully sequenced the mitochondrial genomes of F. spadix (15,085 bp) and N. specialis (16,820 bp), each containing 37 genes.
- Phylogenetic analysis placed F. spadix within Leptopsyllidae and N. specialis as a sister taxon to other species.
- Established new phylogenetic insights into the relationships between major flea families.
Conclusions:
- The first-time sequencing of these flea mitogenomes provides a foundation for future systematic and molecular studies.
- This research enhances our understanding of Siphonaptera phylogeny and the evolutionary history of fleas.
- The data generated will aid in developing strategies for managing flea-borne diseases.
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