Genetic diversity of Hungarian Maize dwarf mosaic virus isolates

The genetic diversity of the coat-protein (CP) region and the untranslated C-terminal region (3′UTR) of Maize dwarf mosaic virus (MDMV) was analyzed to evaluate the variability between isolates (inter-isolate sequence diversity). The results of inter-isolate sequence diversity analysis showed that the diversity of the MDMV CP gene is fairly high (p-distance: up to 0.136). During sequence analysis, a 13 amino-acid residue insertion and an 8 amino-acid residue deletion were found within the N-terminal region of the CP gene. The phylogenetic analysis showed that—unlike other potyvirus species in this subgroup—the MDMV isolates could not be distinguished on the basis of their host plants or geographic origins.