The genome organisation and taxonomy of Sugarcane striate mosaic associated virus |
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Authors: | N Thompson J W Randles |
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Institution: | (1) Department of Applied and Molecular Ecology, Adelaide University, Glen Osmond, Australia, AU |
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Abstract: | Summary. Sugarcane striate mosaic associated virus (SCSMaV) has slightly flexuous 950 nm × 15 nm filamentous particles and is associated with sugarcane striate mosaic disease
in central Queensland, Australia. We report the full sequence of its RNA genome, which comprises 5 open reading frames representing
the polymerase, movement function proteins encoded in a triple gene block and coat protein. Phylogenetic analyses based on
either the full nucleotide sequence, the polymerase protein, or the coat protein all placed SCSMaV in an intermediate position
between the genera Foveavirus and Carlavirus, but outside both genera. In addition, the absence of a sixth open reading frame excludes it from the genus Carlavirus, and the coat protein is approximately half the size of the type member for the genus Foveavirus. Although SCSMaV was most closely allied to Cherry green ring mottle virus by genome analysis, the two viruses are morphologically and biologically dissimilar. SCSMaV may therefore represent a new
plant virus taxon.
Received January 30, 2001/Accepted May 29, 2001 |
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