Hop stunt viroid

The hop stunt viroid (abbreviated HSVd, binomial name Hostuviroid impedihumuli) is a viroid species that infects the common hop plant,^[1] citrus plants, grapevines, cucumber, and several Prunus species such as almond, apricot, plum, and peach.^[2][3] It is asymptomatic or latent in most host plants, but in some hosts it can cause stunting and other symptoms. A study of HSVd-infected hops in the USA showed that the severity of yield reduction was highly dependent on the infected hop cultivar.^[4]

Hop stunt viroid
Virus classification
Informal group:	Subviral agents
Informal group:	Viroids
Family:	Pospiviroidae
Genus:	Hostuviroid
Species:	Hop stunt viroid

HSVd is a member of the Pospiviroidae family and the Hostuviroid genus. There are various different sub-species of the hop stunt viroid.

Genome

The hop stunt viroid has a single-stranded RNA genome; the genome is 297 nucleotides long.^[2]

Strains

All strains are from NCBI.^[5]

• Citrus gummy bark viroid
• Dapple peach fruit disease viroid
• Dapple plum and peach fruit disease viroid
• Grapevine viroid
• Hop stunt viroid - citrus
• Hop stunt viroid - cucumber