Kefir is a fermented dairy product that contains many types of lactic acid bacteria and different types of yeast. Yeasts in kefir culture are important in creating the unique properties of kefir. When yeasts are not included in kefir production, the unique properties of kefir do not emerge. In this study, the effects of various yeast microorganisms that can cause negative effects, such as swelling and deformation, in industrial kefir production on product quality characteristics were investigated. For this purpose, a commercial yeast-free kefir culture was supplemented with selected yeasts: Kluyveromyces marxianus (KM), Debaryomyces hansenii (DH), Kluyveromyces lactis (KL), Saccharomyces boulardii (SB), Saccharomyces cerevisiae (SC), Candida colliculosa (CC), Yarrowia lipolytica (YL), and Geotrichum candidum (GC) used in kefir production. Some physicochemical, rheological, microbiological, and sensory properties of the kefirs were examined during 28 days of storage. As a result of the research, the highest hardness and viscosity values (131.00 ± 1.41 g-1236.50 ± 47.38 cp) were observed in kefirs containing G. candidum, while the highest CO2 amount (151.40 ± 1.07 mg/100 mL) was determined in kefirs containing S. cerevisiae (p < 0.05). While serum separation was not determined in any sample, the highest water holding capacity (58.00% ± 00%) was determined in kefirs containing Y. lipolytica. In terms of sensory evaluation, kefir enriched with C. colliculosa received the highest overall acceptance. In general, the use of different yeast types in kefir production is of great importance, especially in terms of gas-carbon dioxide (CO2) formation and product quality.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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