Abstract
A comparison of the small subunit rRNA gene sequences of the microsporidian isolates from corn borers of the Ostrinia genus from Russia and Belarus indicates that they belong to the Nosema pyrausta species. In order to analyze genetic polymorphism, the nucleotide sequences of the molecular clones of the rRNA intergenic spacer (IGS) of the N. pyrausta isolates from Ostrinia nubilalis and Ostrinia scapulalis (Krasnodar territory), as well as from O. nubilalis (Gomel region, Belarus), are determined. Based on the information obtained and available in Genbank, a high level of divergence of the IGS locus between the isolates of different species and populations of microsporidia, as well as between the molecular clones within individual isolates of parasites, is shown.
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