Abstract
Potato tubers (Solanum tuberosum L. cv. Monalisa) showing superficial necrotic rings typical of Potato virus Y NTN (PVYNTN) infection were collected from commercial potato fields in the State of Sao Paulo (Brazil). An isolate named IAC-PVYNTN was characterized by sequencing 822 and 836 nucleotides from the coat protein and P1 protein coding genes, respectively. The IAC-PVYNTN was observed as a European/North American recombinant isolate closely related to three Eu-PVYNTN isolates that share an alternative recombination site in the coat protein cistron near position 144. Therefore, the IAC-PVYNTN isolate may represent a novel recombinant variant between PVYN N-605 Swiss (European) and PVY O-139 Canadian (North American). Cluster analysis of the P1 sequences found IAC-PVYNTN in the sub-cluster of Eu-PVYN/NTN/N:O. This study supports previous evidence of a common origin for PVYN/NTN in Europe and Brazil.
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