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Population structure and genetic diversity of Rhipicephalus microplus in Zimbabwe

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dc.contributor.author Sungirai, M. en_US
dc.contributor.author Baron, S. en_US
dc.contributor.author van der Merwe, N. A. en_US
dc.contributor.author Moyo, D. Z. en_US
dc.contributor.author De Clercq, P. en_US
dc.contributor.author Maritz-Olivier, C. en_US
dc.contributor.author Madder, M. en_US
dc.date.accessioned 2019-06-04T12:22:08Z
dc.date.available 2019-06-04T12:22:08Z
dc.date.issued 2018 en_US
dc.identifier.issn 0001-706X en_US
dc.identifier.doi http://dx.doi.org/10.1016/j.actatropica.2018.01.003 en_US
dc.identifier.other http://lib.itg.be/pdf/itg/2018/2018atro0042.pdf en_US
dc.identifier.other 30 en_US
dc.identifier.other ITG-B1B; DBM; U-VENTO; JIF; DOI; PDF; Abstract; ITMPUB; DSPACE65 en_US
dc.identifier.uri http://hdl.handle.net/10390/10769
dc.description.abstract Recently there was an expansion in the geographic range of Rhipicephalus microplus in Zimbabwe. In order to understand gene flow patterns and population structure in this highly invasive and adaptable cattle tick, a population genetics study was carried out. Eighty-seven R. microplus tick samples drawn from 5 distinct populations were genotyped using eight polymorphic microsatellite loci. Genetic diversity (He) was high (0.755-0.802) in all the populations, suggesting high levels of gene flow with 97% of genetic variation found within populations and 3% amongst populations. No isolation by distance was observed with low but significant genetic differentiation amongst the populations (0-0.076). Most of the sampled individuals had admixed genetic backgrounds, except for those from Matabeleland North whose genetic makeup appeared different from the rest. Rhipicephalus microplus was recently recorded in this area and the environmental conditions do not support survival of the tick there. These results confirm recent range expansion of the tick and the lowest genetic diversity recorded in the Matabeleland North population is suggestive of a founder effect, which may lead to genetic drift. Generally, the very low levels of genetic differentiation amongst the populations could be a result of the frequent movement of livestock from one area to another, which will have implications for disease control. This study offers further opportunities to study evolutionary adaptation of R. microplus in Zimbabwe and southern Africa. en_US
dc.language English en_US
dc.relation.uri http://www.ncbi.nlm.nih.gov/pubmed/29325969 en_US
dc.subject Ticks en_US
dc.subject Rhipicephalus microplus en_US
dc.subject Entomology en_US
dc.subject Distribution en_US
dc.subject Zimbabwe en_US
dc.subject Africa-Southern en_US
dc.title Population structure and genetic diversity of Rhipicephalus microplus in Zimbabwe en_US
dc.type Article en_US
dc.citation.jtitle Acta Tropica en_US
dc.citation.volume 180 en_US
dc.citation.pages 42-46 en_US
dc.citation.abbreviation Acta Trop en_US


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