Abstract
The complete nucleotide sequences of RNAs 1 to 4 of Beet soilborne mosaic virus (BSBMV) were determined. The genomic organization of BSBMV is identical to Beet necrotic yellow vein virus (BNYVV), the type species of the genus Benyvirus. BSBMV RNA1 encodes a single large open reading frame (ORF) with similar replicase-associated motifs identified for BNYVV. BSBMV RNA2 has six potential ORFs with an organization resembling BNYVV RNA2. RNA3 and RNA4 resemble the analogous BNYVV RNAs, which encode proteins associated with symptom development and fungal transmission, respectively. The predicted ORFs on BNYVV and BSBMV reveal 23% to 83% amino acid identity and the overall nucleotide sequences are 35% to 77% identical. Based on sequence analyses, BSBMV is a new benyvirus that can be distinguished from BNYVV.
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