East African cassava mosaic-like viruses from Africa to Indian Ocean Islands: Molecular diversity, evolutionary history and geographical dissemination of a bipartite begomovirus
Cassava (Manihot esculenta) is a major food source for over 200 million sub-Saharan Africans. Unfortunately, its cultivation is severely hampered by cassava mosaic disease (CMD). Caused by a complex of bipartite cassava mosaic geminiviruses (CMG) species (Family: Geminivirideae; Genus: Begomovirus) CMD has been widely described throughout Africa and it is apparent that CMGs are expanding their geographical distribution. Determining where and when CMG movements have occurred could help curtail its spread and reveal the ecological and anthropic factors associated with similar viral invasions. We applied Bayesian phylogeographic inference and recombination analyses to available and newly described CMG sequences to reconstruct a plausible history of CMG diversification and migration between Africa and South West Indian Ocean (SWIO) islands. The isolation and analysis of 114 DNA-A and 41 DNA-B sequences demonstrated the presence of three CMG species circulating in the Comoros and Seychelles archipelagos (East African cassava mosaic virus, EACMV; East African cassava mosaic Kenya virus, EACMKV; and East African cassava mosaic Cameroon virus, EACMCV). Phylogeographic analyses suggest that CMG's presence on these SWIO islands is probably the result of at least four independent introduction events from mainland Africa occurring between 1988 and 2009. Amongst the islands of the Comoros archipelago, two major migration pathways were inferred: One from Grande Comore to Mohéli and the second from Mayotte to Anjouan. Numerous re-assortments events were detected between EACMV and EACMKV, which seem to almost freely interchange their genome components. Rapid and extensive virus spread within the SWIO islands was demonstrated for three CMG complex species. Strong evolutionary or ecological interaction between CMG species may explain both their propensity to exchange components and the absence of recombination with non-CMG begomoviruses. Our results suggest an important role of anthropic factors in CMGs spread as the principal axes of viral migration correspond with major routes of human movement and commercial trade. (Texte intégral)
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dig-cirad-fr-5679932024-05-02T12:37:36Z http://agritrop.cirad.fr/567993/ http://agritrop.cirad.fr/567993/ East African cassava mosaic-like viruses from Africa to Indian Ocean Islands: Molecular diversity, evolutionary history and geographical dissemination of a bipartite begomovirus. De Bruyn Alexandre, Villemot Julie, Lefeuvre Pierre, Villar Emilie, Hoareau Murielle, Harimalala Mireille Aurélie, Abdoul-Karime Anli Liachouroutu, Abdou-Chakour C., Reynaud Bernard, Harkins Gordon William, Varsani Arvind, Martin Darren Patrick, Lett Jean-Michel. 2013. In : 14èmes Rencontres de virologie végétale (RVV 2013) : Aussois, France, 13-17 janvier 2013. Marais Armelle (ed.), Revers Frédéric (ed.). SFP, INRA. Paris : SFP, Résumé, 14. Rencontres de Virologie Végétale. 14, Aussois, France, 13 Janvier 2013/17 Janvier 2013. East African cassava mosaic-like viruses from Africa to Indian Ocean Islands: Molecular diversity, evolutionary history and geographical dissemination of a bipartite begomovirus De Bruyn, Alexandre Villemot, Julie Lefeuvre, Pierre Villar, Emilie Hoareau, Murielle Harimalala, Mireille Aurélie Abdoul-Karime, Anli Liachouroutu Abdou-Chakour, C. Reynaud, Bernard Harkins, Gordon William Varsani, Arvind Martin, Darren Patrick Lett, Jean-Michel eng 2013 SFP 14èmes Rencontres de virologie végétale (RVV 2013) : Aussois, France, 13-17 janvier 2013 H20 - Maladies des plantes Cassava (Manihot esculenta) is a major food source for over 200 million sub-Saharan Africans. Unfortunately, its cultivation is severely hampered by cassava mosaic disease (CMD). Caused by a complex of bipartite cassava mosaic geminiviruses (CMG) species (Family: Geminivirideae; Genus: Begomovirus) CMD has been widely described throughout Africa and it is apparent that CMGs are expanding their geographical distribution. Determining where and when CMG movements have occurred could help curtail its spread and reveal the ecological and anthropic factors associated with similar viral invasions. We applied Bayesian phylogeographic inference and recombination analyses to available and newly described CMG sequences to reconstruct a plausible history of CMG diversification and migration between Africa and South West Indian Ocean (SWIO) islands. The isolation and analysis of 114 DNA-A and 41 DNA-B sequences demonstrated the presence of three CMG species circulating in the Comoros and Seychelles archipelagos (East African cassava mosaic virus, EACMV; East African cassava mosaic Kenya virus, EACMKV; and East African cassava mosaic Cameroon virus, EACMCV). Phylogeographic analyses suggest that CMG's presence on these SWIO islands is probably the result of at least four independent introduction events from mainland Africa occurring between 1988 and 2009. Amongst the islands of the Comoros archipelago, two major migration pathways were inferred: One from Grande Comore to Mohéli and the second from Mayotte to Anjouan. Numerous re-assortments events were detected between EACMV and EACMKV, which seem to almost freely interchange their genome components. Rapid and extensive virus spread within the SWIO islands was demonstrated for three CMG complex species. Strong evolutionary or ecological interaction between CMG species may explain both their propensity to exchange components and the absence of recombination with non-CMG begomoviruses. Our results suggest an important role of anthropic factors in CMGs spread as the principal axes of viral migration correspond with major routes of human movement and commercial trade. (Texte intégral) conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/567993/1/document_567993.pdf application/pdf Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=214172 |
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H20 - Maladies des plantes H20 - Maladies des plantes De Bruyn, Alexandre Villemot, Julie Lefeuvre, Pierre Villar, Emilie Hoareau, Murielle Harimalala, Mireille Aurélie Abdoul-Karime, Anli Liachouroutu Abdou-Chakour, C. Reynaud, Bernard Harkins, Gordon William Varsani, Arvind Martin, Darren Patrick Lett, Jean-Michel East African cassava mosaic-like viruses from Africa to Indian Ocean Islands: Molecular diversity, evolutionary history and geographical dissemination of a bipartite begomovirus |
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Cassava (Manihot esculenta) is a major food source for over 200 million sub-Saharan Africans. Unfortunately, its cultivation is severely hampered by cassava mosaic disease (CMD). Caused by a complex of bipartite cassava mosaic geminiviruses (CMG) species (Family: Geminivirideae; Genus: Begomovirus) CMD has been widely described throughout Africa and it is apparent that CMGs are expanding their geographical distribution. Determining where and when CMG movements have occurred could help curtail its spread and reveal the ecological and anthropic factors associated with similar viral invasions. We applied Bayesian phylogeographic inference and recombination analyses to available and newly described CMG sequences to reconstruct a plausible history of CMG diversification and migration between Africa and South West Indian Ocean (SWIO) islands. The isolation and analysis of 114 DNA-A and 41 DNA-B sequences demonstrated the presence of three CMG species circulating in the Comoros and Seychelles archipelagos (East African cassava mosaic virus, EACMV; East African cassava mosaic Kenya virus, EACMKV; and East African cassava mosaic Cameroon virus, EACMCV). Phylogeographic analyses suggest that CMG's presence on these SWIO islands is probably the result of at least four independent introduction events from mainland Africa occurring between 1988 and 2009. Amongst the islands of the Comoros archipelago, two major migration pathways were inferred: One from Grande Comore to Mohéli and the second from Mayotte to Anjouan. Numerous re-assortments events were detected between EACMV and EACMKV, which seem to almost freely interchange their genome components. Rapid and extensive virus spread within the SWIO islands was demonstrated for three CMG complex species. Strong evolutionary or ecological interaction between CMG species may explain both their propensity to exchange components and the absence of recombination with non-CMG begomoviruses. Our results suggest an important role of anthropic factors in CMGs spread as the principal axes of viral migration correspond with major routes of human movement and commercial trade. (Texte intégral) |
format |
conference_item |
topic_facet |
H20 - Maladies des plantes |
author |
De Bruyn, Alexandre Villemot, Julie Lefeuvre, Pierre Villar, Emilie Hoareau, Murielle Harimalala, Mireille Aurélie Abdoul-Karime, Anli Liachouroutu Abdou-Chakour, C. Reynaud, Bernard Harkins, Gordon William Varsani, Arvind Martin, Darren Patrick Lett, Jean-Michel |
author_facet |
De Bruyn, Alexandre Villemot, Julie Lefeuvre, Pierre Villar, Emilie Hoareau, Murielle Harimalala, Mireille Aurélie Abdoul-Karime, Anli Liachouroutu Abdou-Chakour, C. Reynaud, Bernard Harkins, Gordon William Varsani, Arvind Martin, Darren Patrick Lett, Jean-Michel |
author_sort |
De Bruyn, Alexandre |
title |
East African cassava mosaic-like viruses from Africa to Indian Ocean Islands: Molecular diversity, evolutionary history and geographical dissemination of a bipartite begomovirus |
title_short |
East African cassava mosaic-like viruses from Africa to Indian Ocean Islands: Molecular diversity, evolutionary history and geographical dissemination of a bipartite begomovirus |
title_full |
East African cassava mosaic-like viruses from Africa to Indian Ocean Islands: Molecular diversity, evolutionary history and geographical dissemination of a bipartite begomovirus |
title_fullStr |
East African cassava mosaic-like viruses from Africa to Indian Ocean Islands: Molecular diversity, evolutionary history and geographical dissemination of a bipartite begomovirus |
title_full_unstemmed |
East African cassava mosaic-like viruses from Africa to Indian Ocean Islands: Molecular diversity, evolutionary history and geographical dissemination of a bipartite begomovirus |
title_sort |
east african cassava mosaic-like viruses from africa to indian ocean islands: molecular diversity, evolutionary history and geographical dissemination of a bipartite begomovirus |
publisher |
SFP |
url |
http://agritrop.cirad.fr/567993/ http://agritrop.cirad.fr/567993/1/document_567993.pdf |
work_keys_str_mv |
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