Lefeuvre Pierre, Martin Darren Patrick, Harkins Gordon William, Lemey Philippe, Gray Alistair J.A., Meredith Sandra, Lakay Francisco, Monjane Adérito Luis, Lett Jean-Michel, Varsani Arvind.
2011. The spread of tomato yellow leaf curl virus from the middle east to the World.
In : 13èmes Rencontres de virologie végétale (RVV 2011), Aussois, France, 16-20 janvier 2011. SFP
Résumé : The ongoing global spread of Tomato yellow leaf curl virus (TYLCV; Genus Begomovirus, Family Geminiviridae) represents a serious looming threat to tomato production in all temperate parts of the world. Whereas determining where and when TYLCV movements have occurred could help curtail its spread and prevent future movements of related viruses, determining the consequences of past TYLCV movements could reveal the ecological and economic risks associated with similar viral invasions. Towards this end we applied Bayesian phylogeographic inference and recombination analyses to available TYLCV sequences (including those of 15 new Iranian full TYLCV genomes) and reconstructed a plausible history of TYLCV's diversification and movements throughout the world (Lefeuvre et al. 2010). In agreement with historical accounts our results suggest that the first TYLCVs probably arose somewhere in the Middle East between the 1930s and 1950s and that the global spread of TYLCV only began in the 1980s after the evolution of the TYLCV-Mld and -IL strains. Despite the global distribution of TYLCV we found no convincing evidence anywhere other than the Middle East and the western Mediterranean of epidemiologically relevant TYLCV variants arising through recombination. Although the region around Iran is both the centre of present day TYLCV diversity and the site of the most intensive ongoing TYLCV evolution, the evidence indicates that the region is epidemiologically isolated which suggests that novel TYLCV variants found there are probably not direct global threats. We instead identify the Mediterranean basin as the main launch-pad of global TYLCV movements. (Texte intégral)
Mots-clés Agrovoc : géminivirus enroulement jaune tomat, épidémiologie
Mots-clés complémentaires : Tomato yellow leaf curl virus
Classification Agris : H20 - Maladies des plantes
Auteurs et affiliations
- Lefeuvre Pierre, CIRAD-BIOS-UMR PVBMT (REU)
- Martin Darren Patrick, Institute of Infectious Diseases and Molecular Medicine (ZAF)
- Harkins Gordon William, University of the Western Cape (ZAF)
- Lemey Philippe, KUL (BEL)
- Gray Alistair J.A., UCT (ZAF)
- Meredith Sandra, UCT (ZAF)
- Lakay Francisco, UCT (ZAF)
- Monjane Adérito Luis, UCT (ZAF)
- Lett Jean-Michel, CIRAD-BIOS-UMR PVBMT (REU)
- Varsani Arvind, University of Canterbury (NZL)
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/558598/)
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