Molecular characterization of faba bean necrotic yellows viruses in Tunisia.

Arch Virol

The Biodesign Center for Fundamental and Applied Microbiomics, Center for Evolution and Medicine, School of Life sciences, Arizona State University, Tempe, AZ, 85287-5001, USA.

Published: March 2018

AI Article Synopsis

  • Faba bean necrotic yellows virus (FBNYV) is a virus with a genome made up of eight circular DNA components and is commonly found in faba beans and chickpeas, often linked with satellite molecules called alphasatellites.
  • Researchers have sequenced the first five genomes of FBNYV and associated alphasatellites from faba beans in Tunisia, along with two additional isolates from chickpeas in Syria and Iran.
  • The sequences of these new FBNYV components show over 84% similarity to known FBNYV sequences, with significant genetic diversity observed in the DNA-M component, and highlight frequent recombination and genome reassortment among nanoviruses.

Article Abstract

Faba bean necrotic yellows virus (FBNYV) (genus Nanovirus; family Nanoviridae) has a genome comprising eight individually encapsidated circular single-stranded DNA components. It has frequently been found infecting faba bean (Vicia faba L.) and chickpea (Cicer arietinum L.) in association with satellite molecules (alphasatellites). Genome sequences of FBNYV from Azerbaijan, Egypt, Iran, Morocco, Spain and Syria have been determined previously and we now report the first five genome sequences of FBNYV and associated alphasatellites from faba bean sampled in Tunisia. In addition, we have determined the genome sequences of two additional FBNYV isolates from chickpea plants sampled in Syria and Iran. All individual FBNYV genome component sequences that were determined here share > 84% nucleotide sequence identity with FBNYV sequences available in public databases, with the DNA-M component displaying the highest degree of diversity. As with other studied nanoviruses, recombination and genome component reassortment occurs frequently both between FBNYV genomes and between genomes of nanoviruses belonging to other species.

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http://dx.doi.org/10.1007/s00705-017-3651-3DOI Listing

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