The RNA-2 of a carrot isolate from the English serotype of tomato black ring nepovirus (TBRV-ED) has been sequenced. It is 4618 nucleotides long and contains one open reading frame encoding a polypeptide of 1344 amino acids. The 5′ non-coding region contains three repetitions of a stem-loop structure also conserved in TBRV-Scottish and grapevine chrome mosaic nepovirus (GCMV). The coat protein domain was mapped to the carboxy-terminal one-third of the polyprotein. Sequence comparisons indicate that TBRV-ED RNA-2 probably arose by an RNA recombination event that resulted in the exchange of the putative movement protein gene between TBRV and GCMV.


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