@article{fdi:010077745,
  title = {{C}omparing patterns and scales of plant virus phylogeography : rice yellow mottle virus in {M}adagascar and in continental {A}frica},
  author = {{R}akotomalala, {M}. and {V}rancken, {B}. and {G}alzi, {A}gn{\`e}s and {R}amavovololona, {P}. and {H}{\'e}brard, {E}ug{\'e}nie and {R}andrianangaly, {J}. {S}. and {D}ellicour, {S}. and {L}emey, {P}. and {F}argette, {D}enis},
  editor = {},
  language = {{ENG}},
  abstract = {{R}ice yellow mottle virus ({RYMV}) in {M}adagascar {I}sland provides an opportunity to study the spread of a plant virus disease after a relatively recent introduction in a large and isolated country with a heterogeneous host landscape ecology. {H}ere, we take advantage of field survey data on the occurrence of {RYMV} disease throughout {M}adagascar dating back to the 1970s, and of virus genetic data from ninety-four isolates collected since 1989 in most regions of the country to reconstruct the epidemic history. {W}e find that the {M}alagasy isolates belong to a unique recombinant strain that most likely entered {M}adagascar through a long-distance introduction from the most eastern part of mainland {A}frica. {W}e infer the spread of {RYMV} as a continuous process using a {B}ayesian statistical framework. {I}n order to calibrate the time scale in calendar time units in this analysis, we pool the information about the {RYMV} evolutionary rate from several geographical partitions. {W}hereas the field surveys and the phylogeographic reconstructions both point to a rapid southward invasion across hundreds of kilometers throughout {M}adagascar within three to four decades, they differ on the inferred origin location and time of the epidemic. {T}he phylogeographic reconstructions suggest a lineage displacement and unveil a re-invasion of the northern regions that may have remained unnoticed otherwise. {D}espite ecological differences that could affect the transmission potential of {RYMV} in {M}adagascar and in mainland {A}frica, we estimate similar invasion and dispersal rates. {W}e could not identify environmental factors that have a relevant impact on the lineage dispersal velocity of {RYMV} in {M}adagascar. {T}his study highlights the value and complementarity of (historical) nongenetic and (more contemporaneous) genetic surveillance data for reconstructing the history of spread of plant viruses.},
  keywords = {phylogeography ; {R}ice yellow mottle virus ; {B}ayesian statistical ; framework ; molecular clock ; dispersal statistics ; ecological drivers ; {MADAGASCAR}},
  booktitle = {},
  journal = {{V}irus {E}volution},
  volume = {5},
  numero = {2},
  pages = {vez023 [12 p.]},
  year = {2019},
  DOI = {10.1093/ve/vez023},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077745},
}