A new method based on high resolution melting (HRM) analysis
was developed for the differentiation and classification
of the yeast species that cause food spoilage. A total 134 strains
belonging to 21 different yeast species were examined to evaluate
the discriminative power of HRM analysis. Two different
highly variable DNA regions on the 26 rRNA gene were
targeted to produce the HRM profiles of each strain. HRMbased
grouping was compared and confirmed by (GTG)5 rep-
PCR fingerprinting analysis. All of the yeast species belonging
to the genera Pichia, Candida, Kazachstania, Kluyveromyces,
Debaryomyces, Dekkera, Saccharomyces, Torulaspora,
Ustilago, and Yarrowia, which were produced as species-specific
HRM profiles, allowed discrimination at species and/or
strain level. The HRM analysis of both target regions provided
successful discrimination that correlated with rep-PCR fingerprinting
analysis. Consequently, the HRM analysis has the
potential for use in the rapid and accurate classification and
typing of yeast species isolated from different foods to determine
their sources and routes as well as to prevent contamination.
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