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Population structure and genetic diversity of Rhipicephalus microplus in Zimbabwe

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Show simple item record Sungirai, M. en_US Baron, S. en_US van der Merwe, N. A. en_US Moyo, D. Z. en_US De Clercq, P. en_US Maritz-Olivier, C. en_US Madder, M. en_US 2019-06-04T12:22:08Z 2019-06-04T12:22:08Z 2018 en_US
dc.identifier.issn 0001-706X en_US
dc.identifier.doi en_US
dc.identifier.other 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.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 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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