Complete genome analysis of African swine fever virus isolated from
domestic pigs during the first ASF outbreaks in India.
Abstract
African swine fever (ASF), considered as the most dreadful swine disease
due to its very high mortality, emerged in India in 2020. The complete
genome analysis of ASF viruses isolated during the first outbreaks in
India showed a few unique non-synonymous mutations in MGF 369-11L, MGF
505-4R, K205R and B263R genes. Frame shiftsin the protein coding
sequences were observed in DP60R, ASFV-G_ACD 00190, MGF 110-10-L-
MGF110-14L fusion, MGF 360-14L and I267L genes of Indian ASFVs as
compared to ASFV/Georgia/2007. Complete genome based phylogenetic
analysis of p72-genotype-II viruses showed the clustering of Indian
isolates with ASFV/Wuhan/2019 in a separate clade. Phylogenetic analysis
of concatenated sequences of 14 open reading frames (ORF) having single
nucleotide polymorphisms (SNP) showed distinct grouping of Indian ASFVs
with other Asian ASFVs.Thisis the first complete genome characterization
of ASF viruses isolated from domestic pigs in India. The resultsindicate
that number of Tandem Repeat Sequence in the intergenic region between
I73R and I329L genes, and the 14 ORFs with SNP reported in this study
could be the genetic determinants to differentiate the closely related
p72-genotype II viruses circulating in Asia.