ArticleVirology journal2026
Nucleotide sequence analysis reveals the presence of PVY-Tam isolates affecting tamarillo in Colombia.
Article in Virology journal, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundTamarillo or tree tomato (Solanum betaceum Cav.) is a fruit tree species of Andean origin with cultural and economic relevance in Colombia. The high incidence of complex viral diseases termed "virosis" in all tamarillo-growing regions of the country leads to huge production losses and seriously threatens its cultivation.
methodsRNA-seq libraries were constructed for symptomatic samples from eight tamarillo-growing locations across the Department of Nariño (Colombia). Their virus diversity was characterized using the Genome Detective software. The identified PVY isolate was subsequently subjected to RT-PCR validation and phylogenetic analysis.
resultsSeveral virus species belonging to the genera Torradovirus, Potyvirus and Polerovirus were identified in mixed infections in tamarillo. Full- or nearly full-length genomes were generated for tomato torrado virus (ToTV), physalis torrado virus (PhyTV), potato leafroll virus (PLRV), and a novel isolate of potato virus Y-Tamarillo (PVY-Tam). When present, PVY-Tam seems to synergistically boost the accumulation of unrelated viruses, therefore contributing to the severity of the infections. Nucleotide sequence analysis suggests that the PVY-Tam from Nariño originated in South America by a recent divergence of the PVY
conclusionsWe provide evidence of a novel PVY-Tam isolate in the Andean region that might promote the severity of unrelated virus partners in field-grown tamarillo. Our findings contribute to understanding tamarillo virosis for the development of effective diagnostic and control strategies.
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