Nucleotide sequence of a new isolate of ribgrass mosaic tobamovirus infecting Impatiens New Guinea.

The complete nucleotide sequence of a tobamovirus isolated from Impatiens New Guinea was determined. The genome was 6302 nt long, and its genomic organisation was similar to those of other crucufer tobamoviruses. Sequence comparisons with the corresponding sequences of other crucifer tobamoviruses revealed highest levels of identity with the ribgrass mosaic virus (Shanghai isolate). A small open reading frame putatively encoding a 4.5-kDa protein with a low degree of similarity to the ORF6 of tobacco mosaic virus was found nested in the movement protein gene.