Two phylogenetic trees showing the relationship of BcPV2 with other partitiviruses. The trees were inferred based on amino acid sequences of RdRp (A) and CP (B) using the Maximum-Likelihood method with bootstrap values determined by 1000 replicates. Bootstrap values higher than 50% are shown in the graphs. The scale bars represent substitutions per nucleotide position. Abbreviations: AhV, Atkinsonella hypoxylon partitivirus; BcPV1, Botrytis cinerea Partitivirus 1; BcPV2, Botrytis cinerea Partitivirus 2; BCV1, Beet cryptic virus 1; BCV2, Beet cryptic virus 2; BfPV1, Botryotinia fuckeliana partitivirus 1; CaCV, Cannabis cryptic virus; CCRSaPV, Cherry chlorotic rusty spot associated partitivirus; CpCV1, Chondrostereum purpureum cryptic virus 1; CPV, Ceratobasidium partitivirus; DCV1, Dill clover cryptic virus 1; DCV2, Dill cryptic virus 2; DdV1, Discula destructiva virus 1; DdV2, Discula destructiva virus 2; FcCV, Fragaria chiloensis cryptic virus; FCV, Fig cryptic virus; FpV1, Fusarium poae virus 1; FsV1, Fusarium solani virus 1; FvBV, Flammulina velutipes browning virus; GPV, Grapevine partitivirus; HetPV1, Heterobasidion partitivirus 1; HetPV12, Heterobasidion partitivirus 12; HetPV13, Heterobasidion partitivirus 13; HetPV15, Heterobasidion partitivirus 15; HetPV3, Heterobasidion partitivirus 3; HetRV2, Heterobasidion partitivirus 2; HetRV8, Heterobasidion partitivirus 8; HmPVV70, Helicobasidium mompa partitivirus V70; OPV1, Ophiostoma partitivirus 1; PCV1, Pepper cryptic virus 1; PCV2, Pepper cryptic virus 2; PeCV, Persimmon cryptic virus; PmAPV, Powdery mildew-associated partitivirus; PoV1, Pleurotus ostreatus virus 1; PsV-F, Penicillium stoloniferum virus F; PsV-S, Penicillium stoloniferum virus S; RnPV2, Rosellinia necatrix partitivirus 2; RnV1, Rosellinia necatrix partitivirus 1; RoCV1, Rose cryptic virus 1; RsCV2, Raphanus sativus cryptic virus 2; RsCV3, Raphanus sativus cryptic virus 3; RsPV2, Rhizoctonia solani partitivirus 2; RsV-717, Rhizoctonia solani virus 717; SLAPV2, Soybean leaf-associated partitivirus 2; SsPV1, Sclerotinia sclerotiorum partitivirus 1; SsPV-S, Sclerotinia sclerotiorum partitivirus S; VCV, Vicia cryptic virus; VdPV1, Verticillium dahliae partitivirus 1; WCCV1, White clover cryptic virus 1; WCCV2, White clover cryptic virus 2. The GenBank accession number of the above-mentioned viruses are listed in Table S2.