Differences in host ranges, and
Differences in genome nucleotide sequences of more than 50%,
Differences in gene product sequences.
|
Type Species |
(ComYMV) |
Species in this genus resemble those in the genus “Rice tungro bacilliform-like viruses” but differ from them in genome organization.
Virions are bacilliform with parallel sides and rounded ends (Fig. 6). Virions are uniformly 30 nm in width. The modal particle length is 130 nm, but particles ranging in length from 60-900 nm are commonly observed. No projections or other capsid surface features have been observed by electron microscopy. Virions have an electron-transparent central core, but there is no information on the nature of the nucleic acid-capsomer interaction. The tubular portion of the virion has a structure based on an icosahedron cut across its 3-fold axis, with a structural repeat of 10 nm and 9 rings of hexamer subunits per 130 nm length.
Within the genome, the capsid protein, aspartate protease, reverse transcriptase and ribonuclease H are expressed in a polyprotein together with the putative cell-to-cell movement protein.
Transmission is in a semi-persistent manner by mealybugs. The virus does not multiply in vectors and there is no transovarial transmission. All life stages of vectors can acquire and transmit virus.
Virions occur only in the cytoplasm either singly or in large groups, randomly distributed or arranged in palisade-like arrays. They do not occur within inclusion bodies or in membrane-bound structures.
The genomes of badnaviruses contain three ORFs organized as shown in Figure 7.
List of Species Demarcation Criteria in the Genus
The criteria demarcating species in the genus are:
|
Differences in host ranges, and |
|
Differences in genome nucleotide sequences of more than 50%, |
|
Differences in gene product sequences. |
Official virus species names are in italics. Tentative virus species names, alternative names ( ), strains or serotypes are not italicized. Virus names, host names { }, genome sequence accession numbers [ ], and assigned abbreviations ( ) are:
|
Aglaonema bacilliform virus |
(ABV) | |
|
Banana streak virus |
[AJ002234] |
(BSV) |
|
Cacao swollen shoot virus |
[L14546] |
(CSSV) |
|
Canna yellow mottle virus |
(CaYMV) | |
|
Citrus mosaic virus |
(CMBV) | |
|
Commelina yellow mottle virus |
[X7924] |
(ComYMV) |
|
Dioscorea bacilliform virus |
(DBV) | |
|
Kalanchoe top-spotting virus |
(KTSV) | |
|
Pineapple bacilliform virus |
(PBV) | |
|
Piper yellow mottle virus |
(PYMoV) | |
|
Schefflera ringspot virus |
(SRV) | |
|
Sugarcane bacilliform virus |
[M89923] |
(SCBV) |
Tentative Species in the Genus
|
Aucuba bacilliform virus |
{Aucuba japonica} |
(AuBV) |
|
Mimosa bacilliform virus |
{Albizzia julibrissin} |
(MBV) |
|
Taro bacilliform virus |
{Colocasia esculenta} |
(TaBV) |
|
Yucca bacilliform virus |
{Yucca elephantipes} |
(YBV) |
|
|  |