BTV field isolates sequenced in this study. Further details of the isolates can be obtained from the dsRNA virus reference collection (www.reoviridae.org/dsRNA_virus_proteins/ReoID/BTV-isolates.htm).

1Serotype/origin (GR: Greece, NIG: Nigeria, MAY: Malaysia, INDIA: India, CYP: Cyprus, ISR: Israel, TUR: Turkey, BUL: Bulgaria, SUD: Sudan, SPA: Spain, MOR: Morocco, REF: Reference strain)/year of isolation.
2Institute for Animal Health, Pirbright Laboratory, UK.
3Number of passages in embryonated chicken eggs.
4Number of passages in BHK-21 cell culture.
5Reference strains of BTV were provided by the Onderstepoort Veterinary Research Institute, including strains of BTV-1 (1958) and BTV-9 (1942) from a South-African origin. However, the strains of BTV-4 and -16 were isolated in Cyprus (1969) and Pakistan (1960) respectively [83], [84].