Hop stunt viroid

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

HSVd is a member of the Pospiviroidae family and the Hostuviroid genus. There are quite a few 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.

Strains
All strains are from NCBI.
 * 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