Comparative analysis of Panicum streak virus and Maize streak virus diversity, recombination patterns and phylogeography

Varsani Arvind, Monjane Adérito Luis, Donaldson Lara, Oluwafemi Sunday, Zinga Innocent, Komba Ephrem Kosh, Plakoutene Didier, Mandakombo Noella, Mboukoulida Joseph, Semballa Silla, Briddon Rob W., Markham Peter G., Lett Jean-Michel, Lefeuvre Pierre, Rybicki Edward P., Martin Darren Patrick. 2009. Comparative analysis of Panicum streak virus and Maize streak virus diversity, recombination patterns and phylogeography. Virology Journal, 6 (194), 14 p.

Quartile : Q3, Sujet : VIROLOGY

Résumé : Background: Panicum streak virus (PanSV; Family Geminiviridae; Genus Mastrevirus) is a close relative of Maize streak virus (MSV), the most serious viral threat to maize production in Africa. PanSV and MSV have the same leafhopper vector species, largely overlapping natural host ranges and similar geographical distributions across Africa and its associated Indian Ocean Islands. Unlike MSV, however, PanSV has no known economic relevance. Results: Here we report on 16 new PanSV full genome sequences sampled throughout Africa and use these together with others in public databases to reveal that PanSV and MSV populations in general share very similar patterns of genetic exchange and geographically structured diversity. A potentially important difference between the species, however, is that the movement of MSV strains throughout Africa is apparently less constrained than that of PanSV strains. Interestingly the MSV-A strain which causes maize streak disease is apparently the most mobile of all the PanSV and MSV strains investigated. Conclusion: We therefore hypothesize that the generally increased mobility of MSV relative to other closely related species such as PanSV, may have been an important evolutionary step in the eventual emergence of MSV-A as a serious agricultural pathogen.

Mots-clés Agrovoc : Geminiviridae, Panicum maximum, Panicum, Poaceae, Brachiaria

Mots-clés géographiques Agrovoc : Afrique

Mots-clés complémentaires : Panicum streak virus, Maize streak virus

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Varsani Arvind, UCT (ZAF)
• Monjane Adérito Luis, UCT (ZAF)
• Donaldson Lara, UCT (ZAF)
• Oluwafemi Sunday, Bowen university (NGA)
• Zinga Innocent, Université de Bangui (CAF)
• Komba Ephrem Kosh, Université de Bangui (CAF)
• Plakoutene Didier, Université de Bangui (CAF)
• Mandakombo Noella, Université de Bangui (CAF)
• Mboukoulida Joseph, Université de Bangui (CAF)
• Semballa Silla, Université de Bangui (CAF)
• Briddon Rob W., National Institute for Biotechnology and Genetic Engineering (PAK)
• Markham Peter G., John Innes Centre (GBR)
• Lett Jean-Michel, CIRAD-BIOS-UMR PVBMT (REU)
• Lefeuvre Pierre, Université de la Réunion (REU)
• Rybicki Edward P., UCT (ZAF)
• Martin Darren Patrick, Institute of Infectious Diseases and Molecular Medicine (ZAF)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/558436/)

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