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Host ecology determines the dispersal patterns of a plant virus
Since its isolation in 1966 in Kenya, rice yellow mottle virus (RYMV) has been reported throughout Africa resulting in one of the economically most important tropical plant emerging diseases. A thorough understanding of RYMV evolution and dispersal is critical to manage viral spread in tropical area...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5014491/ https://www.ncbi.nlm.nih.gov/pubmed/27774287 http://dx.doi.org/10.1093/ve/vev016 |
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author | Trovão, Nídia Sequeira Baele, Guy Vrancken, Bram Bielejec, Filip Suchard, Marc A. Fargette, Denis Lemey, Philippe |
author_facet | Trovão, Nídia Sequeira Baele, Guy Vrancken, Bram Bielejec, Filip Suchard, Marc A. Fargette, Denis Lemey, Philippe |
author_sort | Trovão, Nídia Sequeira |
collection | PubMed |
description | Since its isolation in 1966 in Kenya, rice yellow mottle virus (RYMV) has been reported throughout Africa resulting in one of the economically most important tropical plant emerging diseases. A thorough understanding of RYMV evolution and dispersal is critical to manage viral spread in tropical areas that heavily rely on agriculture for subsistence. Phylogenetic analyses have suggested a relatively recent expansion, perhaps driven by the intensification of agricultural practices, but this has not yet been examined in a coherent statistical framework. To gain insight into the historical spread of RYMV within Africa rice cultivations, we analyse a dataset of 300 coat protein gene sequences, sampled from East to West Africa over a 46-year period, using Bayesian evolutionary inference. Spatiotemporal reconstructions date the origin of RMYV back to 1852 (1791–1903) and confirm Tanzania as the most likely geographic origin. Following a single long-distance transmission event from East to West Africa, separate viral populations have been maintained for about a century. To identify the factors that shaped the RYMV distribution, we apply a generalised linear model (GLM) extension of discrete phylogenetic diffusion and provide strong support for distances measured on a rice connectivity landscape as the major determinant of RYMV spread. Phylogeographic estimates in continuous space further complement this by demonstrating more pronounced expansion dynamics in West Africa that are consistent with agricultural intensification and extensification. Taken together, our principled phylogeographic inference approach shows for the first time that host ecology dynamics have shaped the historical spread of a plant virus. |
format | Online Article Text |
id | pubmed-5014491 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-50144912016-10-21 Host ecology determines the dispersal patterns of a plant virus Trovão, Nídia Sequeira Baele, Guy Vrancken, Bram Bielejec, Filip Suchard, Marc A. Fargette, Denis Lemey, Philippe Virus Evol Research Article Since its isolation in 1966 in Kenya, rice yellow mottle virus (RYMV) has been reported throughout Africa resulting in one of the economically most important tropical plant emerging diseases. A thorough understanding of RYMV evolution and dispersal is critical to manage viral spread in tropical areas that heavily rely on agriculture for subsistence. Phylogenetic analyses have suggested a relatively recent expansion, perhaps driven by the intensification of agricultural practices, but this has not yet been examined in a coherent statistical framework. To gain insight into the historical spread of RYMV within Africa rice cultivations, we analyse a dataset of 300 coat protein gene sequences, sampled from East to West Africa over a 46-year period, using Bayesian evolutionary inference. Spatiotemporal reconstructions date the origin of RMYV back to 1852 (1791–1903) and confirm Tanzania as the most likely geographic origin. Following a single long-distance transmission event from East to West Africa, separate viral populations have been maintained for about a century. To identify the factors that shaped the RYMV distribution, we apply a generalised linear model (GLM) extension of discrete phylogenetic diffusion and provide strong support for distances measured on a rice connectivity landscape as the major determinant of RYMV spread. Phylogeographic estimates in continuous space further complement this by demonstrating more pronounced expansion dynamics in West Africa that are consistent with agricultural intensification and extensification. Taken together, our principled phylogeographic inference approach shows for the first time that host ecology dynamics have shaped the historical spread of a plant virus. Oxford University Press 2015-12-16 /pmc/articles/PMC5014491/ /pubmed/27774287 http://dx.doi.org/10.1093/ve/vev016 Text en © The Author 2015. Published by Oxford University Press. http://creativecommons.org/licenses/by-nc/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
spellingShingle | Research Article Trovão, Nídia Sequeira Baele, Guy Vrancken, Bram Bielejec, Filip Suchard, Marc A. Fargette, Denis Lemey, Philippe Host ecology determines the dispersal patterns of a plant virus |
title | Host ecology determines the dispersal patterns of a plant virus |
title_full | Host ecology determines the dispersal patterns of a plant virus |
title_fullStr | Host ecology determines the dispersal patterns of a plant virus |
title_full_unstemmed | Host ecology determines the dispersal patterns of a plant virus |
title_short | Host ecology determines the dispersal patterns of a plant virus |
title_sort | host ecology determines the dispersal patterns of a plant virus |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5014491/ https://www.ncbi.nlm.nih.gov/pubmed/27774287 http://dx.doi.org/10.1093/ve/vev016 |
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