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First complete genome sequence of carnation latent virus, the type member of the genus Carlavirus

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Abstract

The genus Carlavirus (family Betaflexiviridae, order Tymovirales) currently includes 53 species recognized by the ICTV. The NCBI GenBank database has 43 full-length carlavirus genome sequences (7,890 to 9,073 nt). Surprisingly, the type species Carnation latent virus is not associated with a complete genome sequence of a carnation latent virus (CLV) isolate; GenBank only has accessions with 1313 or fewer nucleotides. The goal of this study was to determine the full-length genome sequence of CLV. Naturally infected greenhouse-grown ‘Kiwi Lace’ carnation plants that tested positive for CLV by ELISA and RT-PCR were used as source plants for high-throughput sequencing, completed by 5' and 3' RACE and validated by Sanger sequencing of CLV-specific RT-PCR-generated amplicons. The complete CLV-KL sequence (MN450069) was determined to be 8,513 nt in length. In pairwise analysis, the genome shares 40-46% identity with recognized carlaviruses and the six in silico-translated proteins have 15-62% amino acid sequence identity to their respective carlavirus orthologs. The CLV-KL coat protein shares 98.4% identity with the NCBI reference sequence CLV-UK. In phylogenetic analysis, CLV clusters with butterbur mosaic virus, coleus vein necrosis virus, and garlic common latent virus. This is the first report of the full genome sequence of an isolate of carnation latent virus, the type member of the genus Carlavirus.

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Funding

This work was supported through USDA funding, Agricultural Research Service, Research Projects 8020-22000-042-00D and 8042-22000-302-00-D.

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Authors and Affiliations

  1. Floral and Nursery Plants Research Unit, US National Arboretum, USDA-ARS, Beltsville, MD, USA

    Ramon Jordan & Erica Korolev

  2. Biotechnology Career Academy, Applications and Research Laboratory, Ellicott City, MD, USA

    Erica Korolev

  3. National Germplasm Resources Laboratory, BARC, USDA-ARS, Beltsville, MD, USA

    Sam Grinstead & Dimitre Mollov

Authors
  1. Ramon Jordan
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  2. Erica Korolev
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  3. Sam Grinstead
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  4. Dimitre Mollov
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Correspondence to Ramon Jordan.

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The authors declare that they have no conflict of interest.

Research involving human participants or animals

This study did not include experiments with human participants or animals performed by any of the authors.

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Jordan, R., Korolev, E., Grinstead, S. et al. First complete genome sequence of carnation latent virus, the type member of the genus Carlavirus. Arch Virol 166, 1501–1505 (2021). https://doi.org/10.1007/s00705-021-04999-y

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  • DOI: https://doi.org/10.1007/s00705-021-04999-y

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