Genome of mycoviruses are

The genome of mycoviruses is ds RNA.
Mycoviruses have double-stranded (ds) or single-stranded (ss) RNA genomes.
Mycoviruses are a diverse group that includes ssRNA, dsRNA, and ssDNA viruses, with or without a protein capsid, as well as with a complex envelope.
Most mycoviruses are transmitted by cytoplasmic interchange and are thought to lack an extracellular phase in their infection cycle.