Informace o publikaci

Dermacentor reticulatus - a tick on its way from glacial refugia to a panmictic Eurasian population

Autoři	BILBIJA Branka SPITZWEG Cäcilia PAPOUŠEK Ivo FRITZ Uwe FÖLDVÁRI Gábor MULLETT Martin IHLOW Flora SPRONG Hein KŘÍŽOVÁ Kristína ANISIMOV Nikolay BELOVA Oxana A. BONNET Sarah I. BYCHKOVA Elizabeth CZUŁOWSKA Aleksandra DUSCHER Georg G. FONVILLE Manoj KAHL Olaf KARBOWIAK Grzegorz KHOLODILOV Ivan S. KIEWRA Dorota KRČMAR Stjepan KUMISBEK Gulzina LIVANOVA Natalya MAJLÁTH Igor MANFREDI Maria Teresa MIHALCA Andrei D. MIRÓ Guadalupe MOUTAILLER Sara NEBOGATKIN Igor V. TOMANOVIĆ Snežana VATANSEVER Zati YAKOVICH Marya ZANZANI Sergio ŠIROKÝ Pavel
Rok publikování	2023
Druh	Článek v odborném periodiku
Časopis / Zdroj	International Journal for Parasitology
Fakulta / Pracoviště MU	Přírodovědecká fakulta
Citace
www	https://doi.org/10.1016/j.ijpara.2022.11.002
Doi	http://dx.doi.org/10.1016/j.ijpara.2022.11.002
Klíčová slova	Divergence; Glacial refugia; Ixodida; Microsatellites; Multigene sequence analysis; Palaearctic; Vectors
Popis	The ornate dog tick (Dermacentor reticulatus) shows a recently expanding geographic distribution. Knowledge on its intraspecific variability, population structure, rate of genetic diversity and divergence, including its evolution and geographic distribution, is crucial to understand its dispersal capacity. All such information would help to evaluate the potential risk of future spread of associated pathogens of medical and veterinary concern. A set of 865 D. reticulatus ticks was collected from 65 localities across 21 countries, from Portugal in the west to Kazakhstan and southern Russia in the east. Cluster analyses of 16 microsatellite loci were combined with nuclear (ITS2, 18S) and mitochondrial (12S, 16S, COI) sequence data to uncover the ticks’ population structures and geographical patterns. Approximate Bayesian computation was applied to model evolutionary relationships among the found clusters. Low variability and a weak phylogenetic signal showing an east–west cline were detected both for mitochondrial and nuclear sequence markers. Microsatellite analyses revealed three genetic clusters, where the eastern and western cluster gradient was supplemented by a third, northern cluster. Alternative scenarios could explain such a tripartite population structure by independent formation of clusters in separate refugia, limited gene flow connected with isolation by distance causing a “bipolar pattern”, and the northern cluster deriving from admixture between the eastern and western populations. The best supported demographic scenario of this tick species indicates that the northern cluster derived from admixture between the eastern and western populations 441 (median) to 224 (mode) generations ago, suggesting a possible link with the end of the Little Ice Age in Europe.