Notes on Family: Megabirnaviridae
This family of bi
viruses of fungi has a much larger (mega
) genome (about 16 kbp) than members of the (vertebrate virus) families Birnaviridae
(about 6 kbp) or Picobirnaviridae
(about 4 kbp). Other mycoviruses with bipartite ds RNA genomes in the genus Partitivirus
have smaller virions and much smaller genomes (usually less than 4 kbp).
Virions are isometric (icosahedral) and about 50 nm in diameter.
Bipartite dsRNA with segments of about 9 and 7 kbp. There are two ORFs predicted on each RNA segment.
Genera in the Family
There is currently only one genus: