The genomic RNA1 and RNA2 sequences of the tobacco rattle virus isolates found in Polish potato fields.

Four tobacco rattle virus (TRV) isolates were identified from tobacco bait seedlings planted in soil samples from Polish potato fields. Sequence analysis of the genomic RNA1 of the isolates revealed significant similarity to the isolates Ho and AL recently found in Germany. Multiple sequence alignments of the genomic RNA2 indicated that the two isolates from northern Poland (Deb57 and Slu24) are in a cluster with the isolates PSG and PLB found in the Netherlands. The remaining two isolates, from central Poland (11r21 and Mlo7), are in a distinct group with the unique isolate SYM found in England. The RNA2 sequences of the studied isolates range from 1998 nt to 2739 nt in length, and all carry deletions of the 2b and/or 2c genes. The isolate Mlo7 has an atypical RNA2 structure, having its cp gene located in its central region.