The genus Socyvirus includes a single species represented by soybean cyst nematode virus 1 (SbCNV1) (Bekal et al., 2011). Phylogenetic analysis using a conserved region of the RdRP region of L places SbCNV1 in a separate clade to the nyaviruses.
Non-segmented, negative-sense RNA genome of 11,359 nucleotides, assembled from a nematode transcriptome (Bekal et al., 2011).
Based on the genome organization, five structural proteins: nucleoprotein (N), phosphoprotein (P), matrix protein (M), glycoprotein (G) and large protein (L).
Genome organization and replication
The SbCNV1 genome contains five ORFs in anti-genomic sense in the order 3'-N–P–M–G–L-5', whereas nyaviruses genomes contain one additional ORF (IV) between the N and G coding sequences. Transcription initiation motifs upstream of the ORFs are not conserved between SbCNV1 and nyaviruses.
SbCNV1 was isolated from a plant parasitic nematode (Heterodera glycines Ichinohe, 1952).
Derivation of names
Socyvirus: from soybean cyst nematode virus and virus. Species: named after the host.
Species demarcation criteria
|Species||Virus name||Isolate||Accession number||RefSeq number||Available sequence||Virus Abbrev.|
|Soybean cyst nematode socyvirus||Soybean cyst nematode virus 1||HM849038||NC_024702||Complete genome||SbCNV-1|