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The members of this genus of plant viruses are similar to the Barley yellow dwarf viruses, the type species. They infect the phloem system of their host plants, often causing loss of chlorophyll and yellowing symptoms. They are transmitted by aphids in a persistent, circulative and non-propagative manner. Mechanical transmission is not possible.
The virions are icoshedral, about 25-30 nm in diameter. The capsid contains 2 structural proteins. The genome consists of single-stranded, messenger-sense RNA.
For a review of the genus see Ali et al., 2014.
Currently, the following species have been entered into the system: