The complete genome sequences of two naturally occurring recombinant isolates of Sugarcane mosaic virus from Iran

Virus Genes
Zohreh MoradiMohammad Zakiaghl

Abstract

Sugarcane mosaic virus (SCMV) is the most prevalent virus causing sugarcane mosaic and maize dwarf mosaic diseases. Here, we presented the first two complete genomic sequences of Iranian SCMV isolates, NRA and ZRA from sugarcane and maize. The complete genome sequences of NRA and ZRA were, respectively, 9571 and 9572 nucleotides (nt) in length, excluding the 3'-terminal poly(A) tail. Both isolates contained a 5'-untranslated region (UTR) of 149 nt, an open reading frame of 9192 nt encoding a polyprotein of 3063 amino acids (aa), and 3'-UTR of 230 nt for NRA and 231 nt for ZRA. SCMV-NRA and -ZRA genome nucleotide sequences were 97.3 % identical and shared nt identities of 79.1-92 % with those of other 21 SCMV isolates available in the GenBank, highest with the isolate Bris-A (AJ278405) (92 and 91.7 %) from Australia. When compared for separate genes, most of their genes shared the highest identities with Australian and Argentinean isolates. Phylogenetic analysis of the complete genomic sequences reveals that SCMV can be clustered to three groups. Both NRA and ZRA were clustered with sugarcane isolates from Australia and Argentina in group III but formed a separate sublineage. Recombination analysis showed that both isolates were...Continue Reading

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