103). RNA polymerase activity is present.
|
Type Species |
(WCCV-1) |
Virions are isometric, 30 nm in diameter. Particles lack fine structural detail, appearing rounded, usually penetrated by the stain to give a ring-like appearance (Fig. 4).
Physicochemical and Physical Properties
Density in CsCl is 1.392 g/cm3.
The virions typically contain two dsRNA segments, 1.7 and 2.0 kbp in size. The larger dsRNA segment codes for the virion-associated RNA polymerase and the smaller codes for the capsid protein (CP). It is not known whether the dsRNA segments are packaged together or separately.
The capsids are made up of single polypeptide species (Mr 55 103). RNA polymerase activity is present.
None reported.
None reported.
Some viruses in the genus are serologically related; none are related to viruses in the genus Betacryptovirus. There are no serological relationships with mycoviruses in the genera Partitivirus and Chrysovirus.
List of Species Demarcation Criteria in the Genus
The criteria to differentiate species in the genus are:
|
host range, |
|
size of dsRNA segments, and |
|
serological relationships. |
Species in the genus are not serologically related (serological differentiation index of 5 or greater). Electrophoretic profiles of the genomic RNAs are distinct.
Official virus species names are in italics. Tentative virus species names, alternative names ( ), strains or serotypes are not italicized. Virus names and assigned abbreviations ( ) are:
|
Alfalfa cryptic virus 1 |
(ACV-1) |
|
Beet cryptic virus 1 |
(BCV-1) |
|
Beet cryptic virus 2 |
(BCV-2) |
|
Beet cryptic virus 3 |
(BCV-3) |
|
Carnation cryptic virus 1 |
(CCV-1) |
|
Carrot temperate virus 1 |
(CTeV-1) |
|
Carrot temperate virus 3 |
(CTeV-3) |
|
Carrot temperate virus 4 |
(CTeV-4) |
|
Hop trefoil cryptic virus 1 |
(HTCV-1) |
|
Hop trefoil cryptic virus 3 |
(HTCV-3) |
|
Radish yellow edge virus |
(RYEV) |
|
Ryegrass cryptic virus |
(RGCV) |
|
Spinach temperate virus |
(SpTV) |
|
Vicia cryptic virus |
(VCV) |
|
White clover cryptic virus 1 |
(WCCV-1) |
|
White clover cryptic virus 3 |
(WCCV-3) |
Tentative Species in the Genus
|
Carnation cryptic virus 2 |
(CCV-2) |
|
Cucumber cryptic virus |
(CuCV) |
|
Fescue cryptic virus |
(FCV) |
|
Garland chrysanthemum temperate virus |
(GCTV) |
|
Mibuna temperate virus |
(MTV) |
|
Poinsettia cryptic virus |
(PnCV) |
|
Red pepper cryptic virus 1 |
(RPCV-1) |
|
Red pepper cryptic virus 2 |
(RPCV-2) |
|
Rhubarb temperate virus |
(RTV) |
|
Santosai temperate virus |
(STV) |
|
|  |
