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Viral diseases are one of the most limiting problems in the production of potato worldwide. Solanum phureja constitutes one of the most susceptible materials to viral diseases in Colombia; however, there are few studies on viruses infecting this crop. In the current study, we performed a molecular characterization of Potato virus V (PVV) that infects S. phureja, using different potato plots located in the province of Antioquia, using Next-Generation Sequencing (NGS), DAS-ELISA, real time RT-PCR (RT-qPCR) and RT-PCR. Results revealed variable levels of incidence among plots (6.7 %-86 %) and the presence of two slightly different variants (Var_A and Var_B) present in approximately 72 %:28 % ratio. These PVV strains have a genome of 9828 nt codifying for a polyprotein of 3066 aa and share high nucleotide sequence identity (99,7 % in their complete genome) with respect to PVV-Phureja, recently described in Colombia, but are very divergent with respect to currently available PVV genomes (82-83 %). The genome information was used to design two sets of primers, useful in the specific detection of this virus in S . phureja leaf samples through RT-PCR (459 bp) and RT-qPCR (89 bp, Ct=12.08-21.86; Tm=78.7 °C-80.2 °C). This study underscores the importance of including diagnostics of PVV in S. phureja tuber-seed certification programs in Colombia.

Caracterización molecular del Potato virus V (PVV) infectando Solanum phureja mediante secuenciación de nueva generación