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Family	00.032.  Not assigned
	Taxonomic Structure of the Family
	Family         00.032. Not assigned Genus                      00.032.0.01. Hordeivirus

List of Species Demarcation Criteria in the Genus

List of Species in the Genus

The ICTVdB virus code and the viruses. Official virus species names are in italics. Tentative virus species names, alternative names ( ), isolates, strains, serotypes, subspecies, or rejected names are not italicized.
 
Virus codes, virus names, genome sequence accession numbers [ ] and assigned abbreviations ( ), are:

Species, their serotypes, strains and isolates

Tentative Species in the Genus

None reported.

Similarity with other Taxa

The hordeivirus replicase sequences are most similar to the pecluvirus, Peanut clump virus (PCV; 65-66 % identity in the RdRp domain), the furovirus Soil borne wheat mosaic virus (SBWMV; 63-67 %), and to the tobravirus, Tobacco rattle virus (TRV; 52-54 %). Besides the hordeiviruses, the TGB MPs are found in allexiviruses, benyviruses, carlaviruses, foveaviruses, furoviruses, pecluviruses, pomoviruses, and potexviruses. The hordeivirus TGB proteins are most similar to PCV proteins, and to those of Potato mop-top virus and Beet soil-borne virus. However, SBWMV and TRV lack the TGB, and encode single MPs unrelated to the TGB proteins. Moreover, in the other TGB-containing viruses, the replicase sequences are only distantly related to those of hordeiviruses. Apparently, reassortment events during evolution have resulted in different phylogenetic trees of hordeivirus TGB MPs and replication-associated proteins. The hordeivirus yb proteins show significant similarity to the respective proteins of SBWMV and PCV, and have a marginal similarity to the cysteine-rich proteins of tobraviruses. The hordeivirus CP sequences are most closely related to CP of PCV. Taking into account the high degree of sequence similarity of the encoded proteins and some common features of genome organization, the hordeiviruses are most closely related to PCV.

Derivation of Names

hordei from hordeus, latin name of Barley, the primary host of the type species virus of the genus.

References

Collated from VIIIth ICTV Report

Contributed by

Bragg, J.N., Solovyev, A.G., Morozov, S. Yu, Atabekov, J.G. Jackson, A.O.

Version 4 is based on Virus Taxonomy, Classification and Nomenclature of Viruses, 8th ICTV Report of the International Committee on Taxonomy of Viruses. Fauquet, CM, Mayo, MA, Maniloff, J, Desselberger, U, and Ball, LA (EDS) (2005) Elsevier/Academic Press, pp. 1259.

Additional References

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