Dellicour S. auteur aut IRD Vrancken B. auteur aut IRD Trovao N. S. auteur aut IRD Fargette Denis auteur aut IRD Lemey P. auteur aut IRD text journalArticle eng text/pdf reformatted digital access Phylogeographic reconstructions are becoming an established procedure to evaluate the factors that could impact virus spread. While a discrete phylogeographic approach can be used to test predictors of transition rates among discrete locations, alternative continuous phylogeographic reconstructions can also be exploited to investigate the impact of underlying environmental layers on the dispersal velocity of a virus. The two approaches are complementary tools for studying pathogens' spread, but in both cases, care must be taken to avoid misinterpretations. Here, we analyse rice yellow mottle virus (RYMV) sequence data from West and East Africa to illustrate how both approaches can be used to study the impact of environmental factors on the virus' dispersal frequency and velocity. While it was previously reported that host connectivity was a major determinant of RYMV spread, we show that this was a false positive result due to the lack of appropriate negative controls. We also discuss and compare the phylodynamic tools currently available for investigating the impact of environmental factors on virus spread. specialized viral phylogeography landscape phylogeography molecular epidemiology RYMV 076 020 4 2 vey023 [9 p.] 2018 2057-1577 https://www.documentation.ird.fr/hor/fdi:010074954 10.1093/ve/vey023 2057-1577 [F B010074954] https://www.documentation.ird.fr/hor/fdi:010074954 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers19-02/010074954.pdf IRD - Base Horizon / Pleins textes 2019-03-06 2019-03-06 fdi:010074954 fre