Reconstructing the history of maize streak virus strain a dispersal to reveal diversification hot spots and its origin in Southern Africa

Monjane Adérito Luis, Harkins Gordon William, Martin Darren Patrick, Lemey Philippe, Lefeuvre Pierre, Shepherd Dionne Natalie, Oluwafemi Sunday, Simuyandi Michelo, Zinga Innocent, Komba Ephrem Kosh, Lakoutene Didier P., Mandakombo Noella, Mboukoulida Joseph, Semballa Silla, Tagne Appolinaire, Tiendrebeogo Fidèle, Erdmann Julia B., Van Antwerpen Tania, Owor Betty E., Flett Bradley, Ramusi Moses, Windram Oliver P., Lett Jean-Michel, Briddon Rob W., Markham Peter G., Rybicki Edward P., Varsani Arvind. 2011. Reconstructing the history of maize streak virus strain a dispersal to reveal diversification hot spots and its origin in Southern Africa. Journal of Virology, 85 (18) : 9623-9636.

Quartile : Q1, Sujet : VIROLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Maize streak virus strain A (MSV-A), the causal agent of maize streak disease, is today one of the most serious biotic threats to African food security. Determining where MSV-A originated and how it spread transcontinentally could yield valuable insights into its historical emergence as a crop pathogen. Similarly, determining where the major extant MSV-A lineages arose could identify geographical hot spots of MSV evolution. Here, we use model-based phylogeographic analyses of 353 fully sequenced MSV-A isolates to reconstruct a plausible history of MSV-A movements over the past 150 years. We show that since the probable emergence of MSV-A in southern Africa around 1863, the virus spread transcontinentally at an average rate of 32.5 km/year (95% highest probability density interval, 15.6 to 51.6 km/year). Using distinctive patterns of nucleotide variation caused by 20 unique intra-MSV-A recombination events, we tentatively classified the MSV-A isolates into 24 easily discernible lineages. Despite many of these lineages displaying distinct geographical distributions, it is apparent that almost all have emerged within the past 4 decades from either southern or east-central Africa. Collectively, our results suggest that regular analysis of MSV-A genomes within these diversification hot spots could be used to monitor the emergence of future MSV-A lineages that could affect maize cultivation in Africa.

Mots-clés Agrovoc : virus striure du maïs, plante alimentaire

Mots-clés géographiques Agrovoc : Afrique du Sud, Afrique

Mots-clés complémentaires : Maize streak virus

Classification Agris : H20 - Maladies des plantes

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

Auteurs et affiliations

• Monjane Adérito Luis, UCT (ZAF)
• Harkins Gordon William, University of the Western Cape (ZAF)
• Martin Darren Patrick, Institute of Infectious Diseases and Molecular Medicine (ZAF)
• Lemey Philippe, KUL (BEL)
• Lefeuvre Pierre, CIRAD-BIOS-UMR PVBMT (REU)
• Shepherd Dionne Natalie, UCT (ZAF)
• Oluwafemi Sunday
• Simuyandi Michelo, Department of Game and Tsetse Control (ZMB)
• Zinga Innocent, Université de Bangui (CAF)
• Komba Ephrem Kosh, Université de Bangui (CAF)
• Lakoutene Didier P., Université de Bangui (CAF)
• Mandakombo Noella, Université de Bangui (CAF)
• Mboukoulida Joseph, Université de Bangui (CAF)
• Semballa Silla, Université de Bangui (CAF)
• Tagne Appolinaire, IRAD (CMR)
• Tiendrebeogo Fidèle, Université de Ouagadougou (BFA)
• Erdmann Julia B., UCT (ZAF)
• Van Antwerpen Tania, South African Sugarcane Resarch Institute (ZAF)
• Owor Betty E., University of Cambridge (GBR)
• Flett Bradley, ARC (ZAF)
• Ramusi Moses, ARC (ZAF)
• Windram Oliver P., University of Warwick (GBR)
• Lett Jean-Michel, CIRAD-BIOS-UMR PVBMT (REU)
• Briddon Rob W., National Institute for Biotechnology and Genetic Engineering (PAK)
• Markham Peter G., John Innes Centre (GBR)
• Rybicki Edward P., UCT (ZAF)
• Varsani Arvind, University of Canterbury (NZL)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/561377/)

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