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Characterization and detection of a novel idaeovirus infecting blackcurrant


A novel virus was discovered in a blackcurrant accession (Ribes nigrum L.) at the USDA genebank in Oregon, USA. The genome consists of two positive-sense, single-stranded RNAs with the first encoding a 197 kDa multifunctional protein with methyl transferase, helicase and RNA-dependent RNA polymerase enzymatic motifs. The second molecule encodes two putative proteins; the 39 kDa movement and 30 kDa coat proteins. Both RNAs have conserved sequences and structures at the 5′ and 3′ termini. The genome organization, sequence and phylogenetic analyses indicate that the virus is a putative new member of the genus Idaeovirus, as it consistently groups with privet leaf blotch-associated virus and raspberry bushy dwarf virus. A duplex RT-PCR assay was developed for rapid detection of both genomic RNAs simultaneously. The work presented in this communication will assure the health status of blackcurrant plants in mother blocks, nurseries and production fields alike.

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The authors acknowledge the financial support of USDA awards 14-8130-0420-CA and 14-8130-0392-CA.

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Corresponding author

Correspondence to Ioannis E. Tzanetakis.

Additional information

While this paper was accepted with revisions and awaiting the final review by the handling editor, the article ’Complete genome sequence and analysis of blackcurrant leaf chlorosis associated virus, a new member of the genus Idaeovirus’ by James and Phelan was published online as an Online First Article in Archives of Virology. After pairwise comparisons we have verified that the two viruses are isolates of the same species.

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Thekke-Veetil, T., Ho, T., Postman, J.D. et al. Characterization and detection of a novel idaeovirus infecting blackcurrant. Eur J Plant Pathol 149, 751–757 (2017).

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  • Idaeovirus
  • Blackcurrant
  • BCIV
  • Large scale sequencing
  • Characterization
  • Detection