Genome organization and phylogenetic tree analysis of Garlic virus E, a new member of genus Allexivi

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The complete sequence of an Allexivirus isolated from garlic plants in Yuhang City, Zhejiang Province, China had been determined. The single-strand, positive RNA genome was 8451 nucleotides in length excluding poly(A) tail. The genome organization of this virus was similar to that of the other Allexiviruses but only with 62.8%-64.8% nucleotide acid identities. The amino acid sequences of proteins encoded by ORF1-6 shared 67.6%-78.5%, 55.4%-66.2%, 56.7%- 66.4%, 40.3%-55.6%, 66.3%-79.7% and 52.2%- 68.8% identities with those of the others respectively. The homology range between it and the other Allexiviruses was similar to that between the other distinct species in this genus. A more comprehensive comparison using all available CP amino acid sequences showed that it shared only 63.9%- 79.8% amino acids identical with the others. Therefore, it had been considered as a new member of the genus, named as garlic virus E (GarV-E). Phylogenetic analysis confirmed GarV-E as a distinct member and the correct names and classification of some members of genus Allexivirus were also discussed.
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