title: Genetic and phenotypic intraspecific variability of non-Saccharomyces yeasts populations from La Rioja winegrowing region (Spain).
abstract: OBJECTIVE
  To determine the intraspecific genetic diversity within five non-Saccharomyces yeast species and the diversity in phenotypic characteristic related to their technological properties.
  
  
  RESULTS
  Seventy-one non-Saccharomyces yeasts isolated from different fermentations and facilities of the DOCa Rioja (Spain) belonging to five different wine species (Torulaspora delbrueckii, Lachancea thermotolerans, Metschnikowia pulcherrima, Zygosaccharomyces bailii and Williopsis pratensis) were subjected to clonal characterization by RAPD-PCR, which evidenced wide diversity between them. They were also submitted to a screening for some oenological traits related to the improvement of the aroma of the wine and yeast development in musts. Strains within the same species showed different enzyme activities, tolerated different levels of SO2and possessed different killer phenotypes. These characteristics made them adjust better or worse to specific vinification processes or wine quality criteria.
  
  
  CONCLUSIONS
  A significant genetic and phenotypic variation within the non-Saccharomyces species studied was found, which makes necessary to carry out a selection process in each one.
  
  
  CONCLUSIONS
  Williopsis pratensis, a species that has not been thoroughly explored, may deserve further consideration for oenological applications. Due to the wide range of variation within species, the strains adaptation to the SO2levels in musts has to be taken into account in selection processes.
authors.affiliation: ICVV, Instituto de Ciencias de la Vid y el Vino, (Universidad de La Rioja, Gobierno de La Rioja, CSIC), Logroño, Spain.
authors.forename: L
authors.initials: L
authors.lastname: González-Arenzana
authors.affiliation: ICVV, Instituto de Ciencias de la Vid y el Vino, (Universidad de La Rioja, Gobierno de La Rioja, CSIC), Logroño, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Garijo
authors.affiliation: ICVV, Instituto de Ciencias de la Vid y el Vino, (Universidad de La Rioja, Gobierno de La Rioja, CSIC), Logroño, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Berlanas
authors.affiliation: ICVV, Instituto de Ciencias de la Vid y el Vino, (Universidad de La Rioja, Gobierno de La Rioja, CSIC), Logroño, Spain.
authors.forename: I
authors.initials: I
authors.lastname: López-Alfaro
authors.affiliation: ICVV, Instituto de Ciencias de la Vid y el Vino, (Universidad de La Rioja, Gobierno de La Rioja, CSIC), Logroño, Spain.
authors.forename: R
authors.initials: R
authors.lastname: López
authors.affiliation: ICVV, Instituto de Ciencias de la Vid y el Vino, (Universidad de La Rioja, Gobierno de La Rioja, CSIC), Logroño, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Santamaría
authors.affiliation: ICVV, Instituto de Ciencias de la Vid y el Vino, (Universidad de La Rioja, Gobierno de La Rioja, CSIC), Logroño, Spain.
authors.forename: A R
authors.initials: AR
authors.lastname: Gutiérrez
mesh_terms: D000898:Antibiosis; D005285:Fermentation; D010641:Phenotype; D019105:Random Amplified Polymorphic DNA Technique; D013030:Spain; D013458:Sulfur Dioxide / Q000378:metabolism; D014118:Toxins, Biological / Q000032:analysis; D014920:Wine / Q000032:analysis / Q000382:microbiology*; D015003:Yeasts / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism
chemical_list: D014118:Toxins, Biological; D013458:Sulfur Dioxide
keywords: 
  SO
  2
  ; genetic characterization; killer phenotype; non-Saccharomyces; wine; β-glucosidase