Genus “Rice Tungro Bacilliform-like Viruses”

Type Species	Rice tungro bacilliform virus	(RTBV)

Distinguishing Features

The sole species shares many of the distinguishing features of those in the genus Badnavirus. The genome differs in that it contains four ORFs, organized as shown in Figure 8. The genome nucleotide sequence has about 20-25% homology to the genomes of badnaviruses. Rice tungro bacilliform virus (RTBV) is transmitted by leafhoppers with the assistance of Rice tungro spherical virus (RTSV; genus Waikavirus; family Sequiviridae).

List of Species Demarcation Criteria in the Genus

Not applicable.

List of Species in the Genus

Official virus species names are in italics. Tentative virus species names, alternative names ( ), strains or serotypes are not italicized. Virus name, genome sequence accession numbers [ ], and assigned abbreviation ( ) are:

Species in the Genus

Rice tungro bacilliform virus	[X57924, M65026, AF076470]	(RTBV)

Tentative Species in the Genus

None reported.

Phylogenetic Relationships within the Family

See Fig. 9.

Similarities with Other Taxa

The bacilliform shape of the virions of “Rice tungro bacilliform-like viruses” and badnaviruses is like those of the virions of Alfalfa mosaic virus (genus Alfamovirus; family Bromoviridae) and Mushroom bacilliform virus (genus Barnavirus; family Barnaviridae) but these are smaller being up to 60  nm long and about 18  nm diameter.

Derivation of Names

Badna: sigla from bacilliform DNA viruses.

Caulimo: sigla from cauliflower mosaic virus.