Ochola D. auteur aut IRD Issaka S. L. auteur aut IRD Rakotomalala M. auteur aut IRD Galzi Agnès auteur aut IRD Ndikumana I. auteur aut IRD Hubert J. auteur aut IRD Hébrard Eugénie auteur aut IRD Sere Y. auteur aut IRD Tusiime G. auteur aut IRD Fargette Denis auteur aut IRD text journalArticle eng text/pdf born digital access Epidemics of rice yellow mottle virus (RYMV) have developed recently in eastern Uganda, close to Lake Victoria in East Africa. Unexpectedly, all isolates from the affected area belonged to a single strain (named S4ug), a strain that is different from the S4lv strain that has been prevalent in the Lake Victoria basin for the past five decades. Interestingly, the S4ug strain is most closely related at the genomic level (except ORF1) to the strain present in Madagascar (S4mg), 2000 km away. The minor parent of the S4mg recombinant strain could not be detected. Molecular clock dating analysis indicated that the singular sequence of events - that associated the emergence of a new strain (S4ug), a modular recombination between closely related strains (S4mg and S4ug) and a long distance transmission (S4mg) - occurred recently, within the past few decades. This finding is at variance with the process of gradual strain dispersal and diversification over two centuries throughout Africa that was previously established. specialized Virus emergence Rice Africa Island biogeography OUGANDA AFRIQUE DE L'EST MADAGASCAR 076 195 64-72 2015 0168-1702 https://www.documentation.ird.fr/hor/fdi:010063722 10.1016/j.virusres.2014.09.004 0168-1702 [F B010063722] https://www.documentation.ird.fr/hor/fdi:010063722 https://www.documentation.ird.fr/intranet/publi/2015/02/010063722.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2015-03-03 2017-08-23 fdi:010063722 fre