Table 1.

Data sources used to build the v4 release of IMG/VR, as well as the number of UViGs and vOTUs within each. Numbers for high-confidence viruses and vOTUs containing high-confidence viruses in the geNomad-identified UViGs are shown within parenthesis. For additional statistics: https://portal.nersc.gov/cfs/m342/imgvr_stats/

Source	Reference	Description	No. of UViGs	No. of vOTUs
IMG/M mining with geNomad	(19)	Mining IMG/M’s public sequencing data using geNomad	15 303 607 (5 202 181)	8 452 288 (2 744 855)
RefSeq r213	(24)	Viral genomes imported from NCBI	13 971	12 410
Inoviruses	(25)	Custom search of extrachromosomal and integrated Inoviridae genomes using marker genes and gene content features	228	5281
Giant virus MAGs (GVMAGs)	(21)	Custom search for Nucleocytoviricota MAGs in IMG/M	2055	2005
RVMT	(12)	Identification of Orthornavirae in IMG/M metatranscriptomes using a custom set of RNA-dependent RNA polymerase models.	348 762	163 939