Olive Leaf Mottling Virus: A New Member of the Genus <i>Olivavirus</i>
2024
Ana Belén Ruiz-García | Thierry Candresse | José Malagón | Manuel Ruiz-Torres | Sergio Paz | Ana Pérez-Sierra | Antonio Olmos
Studies of the virome of olive trees with symptoms of leaf mottling by high-throughput sequencing (HTS) revealed the presence of a new virus. Full coding genome sequences of two isolates were determined and consisted of a single RNA segment of 16,516 nt and 16,489, respectively. The genomic organization contained 10 open reading frames (ORFs) from 5′ to 3′: ORF1a, ORF1b (RdRp), ORF2 (p22), ORF3 (p7), ORF4 (HSP70h), ORF5 (HSP90h), ORF6 (CP), ORF7 (p19), ORF8 (p12), ORF9 (p23) and ORF10 (p9). Phylogenetic analyses clustered this virus in the genus <i>Olivavirus</i>, family <i>Closteroviridae,</i> with the closest species being <i>Olivavirus flaviolae</i>, commonly named olive leaf yellowing-associated virus (OLYaV). However, amino acid sequences of all taxonomically relevant proteins showed, in all cases, a divergence higher than 25% between OLYaV and the new virus, indicating that it represents a new species in the genus <i>Olivavirus</i> for which the common name of olive leaf mottling virus (OLMV) is proposed. This study represents an advance in the genus <i>Olivavirus</i> and provides new insights into the olive virome.
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