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Volume 156, Issue 7

Genetic diversity in Italian strains assessed by multilocus sequence typing and pulsed-field gel electrophoresis analyses Free

Abstract

is a lactic acid bacterium that characterizes the sourdough environment. The genetic differences of 24 strains isolated in different years from sourdoughs, mostly collected in Italy, were examined and compared by PFGE and multilocus sequence typing (MLST). The MLST scheme, based on the analysis of six housekeeping genes (, and ) was developed for this study. PFGE with the restriction enzyme I proved to have higher discriminatory power, since it revealed 22 different pulsotypes, while 19 sequence types were recognized through MLST analysis. Notably, restriction profiles generated from three isolates collected from the same firm but in three consecutive years clustered in a single pulsotype and showed the same sequence type, emphasizing the fact that the main factors affecting the dominance of a strain are correlated with processing conditions and the manufacturing environment rather than the geographical area. All results indicated a limited recombination among genes and the presence of a clonal population in The MLST scheme proposed in this work can be considered a useful tool for characterization of isolates and for in-depth examination of the strain diversity and evolution of this species.

  • Received:
  • Accepted:
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  • Published Online:
Keyword(s): MLST, multilocus sequence typing , ST, sequence type and UPGMA, unweighted pair group method with arithmetic means
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2010-07-01
2024-04-24
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Genetic diversity in Italian Lactobacillus sanfranciscensis strains assessed by multilocus sequence typing and pulsed-field gel electrophoresis analyses
Microbiology 156, 2035 (2010); https://doi.org/10.1099/mic.0.037341-0
/content/journal/micro/10.1099/mic.0.037341-0
/content/journal/micro/10.1099/mic.0.037341-0
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