In 2018, the family Arenaviridae was expanded by inclusion of 1 new genus and 5 novel species. At the same time, the recently established order Bunyavirales was expanded by 3 species. This article presents the updated taxonomy of the family Arenaviridae and the order Bunyavirales as now accepted by the International Committee on Taxonomy of Viruses (ICTV) and summarizes additional taxonomic proposals that may affect the order in the near future.

did not infect any of the resistant cultivars. However, the most virulent strain, G7, infected all cultivars tested Soybean mosaic virus (SMV) causes one of the most destructive and caused necrosis in Marshall, Ogden, Kwanggyo, and viral diseases in soybean [Glycine max (L.) Merr.] worldwide. Ninetyeight SMV isolates identified in the USA have been classified into Buffalo and mosaic symptoms in Davis and York. seven strain groups (G1-G7). Three independent loci (Rsv1, Rsv3, Various sources of SMV resistance have been identiand Rsv4) have been identified for SMV resistance. Multiple resisfied in soybean. Several gene symbols have been astance alleles have been reported for the Rsv1 and Rsv3 locus. The signed for the SMV-resistance alleles identified in the objective of this research was to group diverse soybean genotypes on USA. There are three independent loci reported so far the basis of their differential reactions to SMV strains. SMV strains for SMV resistance, Rsv1, Rsv3, and Rsv4. Eight resis-G1 and G7 were used to characterize the reactions of 212 soybean tance alleles have been identified at the Rsv1 locus, genotypes to SMV. Fifty-five genotypes were resistant to G1 but namely, Rsv1 in PI 96983, Rsv1-t in Ogden, Rsv1-y in susceptible to G7, and virus was detected in G7-inoculated plants. York, Rsv1-m in Marshall, Rsv1-k in Kwanggyo, Rsv1-r Thirty-one genotypes were resistant to G1 but exhibited stem-tip in 'Raiden', Rsv1-h in 'Suweon 97', Rsv1-s in LR1, and necrosis following G7 inoculation. These 86 soybean genotypes presumably carry alleles at the Rsv1 locus. Thirty-seven genotypes were Rsv1-n in PI 507389 (Buss et al., 1997; Buzzell and Tu, resistant to G1 and G7, and SMV was not detected by ELISA, indicat-1989; Chen et al.; Kiihl ing that they probably carry Rsv4, Rsv1-r, or Rsv1-h or a combination and Hartwig, 1979;Ma et al., 1995 Ma et al., , 2003. Two alleles of two resistance genes Rsv1Rsv3, Rsv1Rsv4, or Rsv3Rsv4. Seven for SMV resistance have been reported at the Rsv3 genotypes were susceptible to G1 but resistant to G7 and may carry locus; one was identified in OX 686 soybean line derived alleles at the Rsv3 locus. PI 507389 and PI 61944 developed stemfrom the cultivar Columbia (Buzzell and Tu, 1989), and tip necrosis after inoculation with G1 and a mosaic symptom when the other was found in L29 soybean derived from the inoculated with G7, indicating that PI 61944 may carry the same cultivar Hardee (Buss et al., 1999). The Rsv4 locus was Rsv1-n gene as PI 507389. Eighty soybean accessions developed moidentified in a breeding line V94-5152 derived from PI saic symptoms when inoculated with G1 or G7 because of the lack 486355 ϫ 'Essex' and was shown to confer resistance

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Soybean cultivar J05 was identified to be resistant to the most virulent strain of soybean mosaic virus (SMV) in northeastern China. However, the reaction of J05 to SMV strains in the United States of America is unknown, and genetic information is needed to utilize this germplasm in a breeding program. The objectives of this study were to determine the reaction of J05 to all US strains of SMV (G1-G7), the inheritance of SMV resistance in J05, and the allelic relationship of resistance genes in J05 with other reported resistance genes. J05 was crossed with susceptible cultivar Essex (rsv) to study the inheritance of SMV resistance. J05 was also crossed with PI 96983 (Rsv1), L29 (Rsv3), and V94-5152 (Rsv4) to test the allelism of resistance genes. F(2) populations and F(2:3) lines from these crosses were inoculated with G1 or G7 in the greenhouse. Inheritance and allelism studies indicate that J05 possesses 2 independent dominant genes for SMV resistance, one at the Rsv1 locus conferring resistance to G1 and necrosis to G7 and the other at the Rsv3 locus conditioning resistance to G7 but susceptibility to G1. The presence of both genes in J05 provides resistance to G1 and G7. J05 is unique from the previous sources that carry 2 genes of Rsv1Rsv3 and will be useful in breeding for SMV resistance.