An isolate of cucumber mosaic virus (CMV), designated CMV-Rom, was isolated from rosemary (Rosmarinus officinalis) plants in several locations near Avignon, France. Laboratory studies showed that, unlike typical CMV isolates, CMV-Rom has a particularly narrow host range. It could be transmitted by aphids Aphis gossypii and Myzus persicae, but with low efficacy compared to a typical CMV isolate. Phylogenetic analysis of the nucleotide sequences of the CMV-Rom genomic RNAs shows that this isolate does not belong to any of the previously described CMV subgroups, IA, IB, II or III.
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