<p>Two novel poleroviruses were repeatedly identified by metagenomics in French barley over the 2018–2023 period. One showed ~ 98.5% nucleotide (nt) identity with plant-associated polerovirus 3 (PaPV3) identified by metagenomics in Slovenia, while the second represents a novel species for which the name barley virus H (BVH) is proposed. Both viruses show a typical polerovirus genome organization but do not have ORF6 or ORF7. In French cereals samples, the most prevalent polerovirus was barley virus G (6.4%) followed by BVH (2.3%), cereal yellow dwarf virus RPV (CYDV-RPV, 1.8%) and PaPV3 (0.9%) suggesting the novel poleroviruses to be as prevalent as CYDV.</p>

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Repeated identification of plant-associated polerovirus 3 (PaPV3) and of a novel polerovirus in the virome of French grain cereals

  • L. Svanella-Dumas,
  • A. Marais,
  • C. Faure,
  • B. Bergey,
  • R. Comte,
  • T. Candresse

摘要

Two novel poleroviruses were repeatedly identified by metagenomics in French barley over the 2018–2023 period. One showed ~ 98.5% nucleotide (nt) identity with plant-associated polerovirus 3 (PaPV3) identified by metagenomics in Slovenia, while the second represents a novel species for which the name barley virus H (BVH) is proposed. Both viruses show a typical polerovirus genome organization but do not have ORF6 or ORF7. In French cereals samples, the most prevalent polerovirus was barley virus G (6.4%) followed by BVH (2.3%), cereal yellow dwarf virus RPV (CYDV-RPV, 1.8%) and PaPV3 (0.9%) suggesting the novel poleroviruses to be as prevalent as CYDV.