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The role of Kenya in the trans-african spread of maize streak virus strain a

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dc.contributor.author Daniel Pande, Eugene Madzokere, Penelope Hartnady, Simona Kraberger, James Hadfield, Karyna Rosario, Anja Jäschke, Adérito L Monjane, Betty E Owor, Mathews M Dida, Dionne N Shepherd, Darren P Martin, Arvind Varsani, Gordon W Harkins
dc.date.accessioned 2020-09-01T06:40:51Z
dc.date.available 2020-09-01T06:40:51Z
dc.date.issued 2017-03-15
dc.identifier.citation 7 en_US
dc.identifier.uri https://repository.maseno.ac.ke/handle/123456789/2631
dc.description The article can be viewed in full text via URL;https://www.sciencedirect.com/science/article/abs/pii/S0168170216308383 en_US
dc.description.abstract Maize streak virus (MSV), the causal agent of maize streak disease (MSD), is the most important viral pathogen of Africa’s staple food crop, maize. Previous phylogeographic analyses have revealed that the most widely-distributed and common MSV variant, MSV-A1, has been repeatedly traversing Africa over the past fifty years with long-range movements departing from either the Lake Victoria region of East Africa, or the region around the convergence of Zimbabwe, South Africa and Mozambique in southern Africa. Despite Kenya being the second most important maize producing country in East Africa, little is known about the Kenyan MSV population and its contribution to the ongoing diversification and trans-continental dissemination of MSV-A1. We therefore undertook a sampling survey in this country between 2008 and 2011, collecting MSD prevalence data in 119 farmers’ fields, symptom severity data for 170 maize plants and complete MSV genome sequence data for 159 MSV isolates. We then used phylogenetic and phylogeographic analyses to show that whereas the Kenyan MSV population is likely primarily derived from the MSV population in neighbouring Uganda, it displays considerably more geographical structure than the Ugandan population. Further, this geographical structure likely confounds apparent associations between virus genotypes and both symptom severity and MSD prevalence in Kenya. Finally, we find that Kenya is probably a sink rather than a source of MSV diversification and movement, and therefore, unlike Uganda, Kenya probably does not play a major role in the trans-continental dissemination of MSV-A1. en_US
dc.publisher Elsevier en_US
dc.subject Kenya;Maize streak virus;Mastrevirus;Geminivirus;MSV spread en_US
dc.title The role of Kenya in the trans-african spread of maize streak virus strain a en_US
dc.type Article en_US


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