Journal of General Virology (2009) 90, 2293-2298

Jeremy R. Thompson and Mark Tepfer (2009)
The 3' untranslated region of Cucumber mosaic virus (CMV) subgroup II RNA3 arose by interspecific recombination between CMV and Tomato aspermy virus
Journal of General Virology 90 (9), 2293-2298
Abstract: Recombination in single-stranded RNA viruses is one of the principal mechanisms responsible for their evolution. Here we show, using a variety of different methods, that the 3' untranslated region (3'UTR) of subgroup II strains of cucumber mosaic virus [CMV(II)] is related more closely to that of tomato aspermy virus (TAV) than to those of CMV(I) strains. These results suggest that the CMV(II) 3'UTR arose by interspecific CMV/TAV recombination. The putative crossover is close to the 5' end of the 3'UTR, at a recombination hot spot previously observed in short time-frame experiments. The CMV(II) strains show divergence from TAV at specific points along the 3'UTR that most probably indicate adaptive changes due to natural selection. Thus, for the large majority of CMV(II) strains examined, the 3'UTR has two discrete regions, W (nt 1902-1971) and Y (nt 2126-2184), that are more similar to the corresponding regions of TAV than to those of CMV(I) strains.
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Database assignments for author(s): Jeremy R. Thompson, Mark Tepfer

Research topic(s) for pests/diseases/weeds:
molecular biology - genes
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Cucumber mosaic virus
	Tomato aspermy virus