The method of RAPD-PCR and comparative analysis of the PCR fingerprinting profiles similarity was used to characterize interspecific diversity of natural isolates of the lactic acid bacteria Streptococcus thermophilus. The strain genetic diversity was demonstrated using three primer variants, designed for different bacterial genome regions. The resolution of RAPD-PCR technique with different primers for identification at the species level and for certification at the strain level, was examined relative to the commercially important cultures of S. thermophilus. The results provided conclusion on preferable usage of RAPD-PCR with the primer ERIC-1 for specific identification of S. thermophilus, and with the primer M13 for certification of natural isolates of this species at the strain level.
Russian Journal of Genetics – Springer Journals
Published: May 24, 2007
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