Temporal analysis of reassortment and molecular evolution of Cucumber mosaic virus: Extra clues from its segmented genome

作者: Kazusato Ohshima , Kosuke Matsumoto , Ryosuke Yasaka , Mai Nishiyama , Kenta Soejima

DOI: 10.1016/J.VIROL.2015.09.024

关键词: PhylogeneticsBiologyMolecular evolutionReassortmentPopulationReassortant VirusesLineage (evolution)Cucumber mosaic virusVirologyEvolutionary biologyCucumovirus

摘要: Cucumber mosaic virus (CMV) is a damaging pathogen of over 200 mono- and dicotyledonous crop species worldwide. It has the broadest known host range any virus, but timescale its evolution unknown. To investigate evolutionary history this we obtained genomic sequences 40 CMV isolates from brassicas sampled in Iran, Turkey Japan, combined them with published sequences. Our synonymous ('silent') site analyses revealed that present population progeny single ancestor existing 1550-2600 years ago, mostly radiated 295-545 ago. We found major lineages are not phylogeographically confined, recombination reassortment restricted to local populations no reassortant lineage more than 251 old. results highlight different patterns seen among viral pathogens brassica crops across world.

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