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32 results for “Wine yeast”
UV mutagenesis conjugated to high throughput screening as a tool to generate new phenotypic diversity in wine yeast
<p><strong>The current global changes, societal and climatic, strongly challenge the wine industry. Multiple methods are applied in the development of new strains for the industry, but many are based on the existing phenotypic and genetic diversities. UV mutagenesis, as an untargeted strategy, has been successfully used for years, with significant examples on wine. Here we developed and validated a UV-mutant generation strategy coupled with a high throughput screening in wine-like conditions. This strategy led to the production of a 502 mutant’s library for which concentrations of eight primary metabolites after fermentation were assessed. This data paper presents the resulting data.</strong></p>
Accompanying Data - Nitrogenous Compound Utilization and Production of Volatile Organic Compounds among Commercial Wine Yeasts Highlight Strain-Specific Metabolic Diversity
<p>This repository contains all the data and some of the performed statistical analysis from all the measurements in the following paper: Scott Jr WT, Van Mastrigt O, Block DE, Notebaart RA, Smid EJ. Nitrogenous compound utilization and production of volatile organic compounds among commercial wine yeasts highlight strain-specific metabolic diversity. Microbiology spectrum. 2021 Aug 31;9(1):10-128.</p><p>Please cite: Scott Jr WT, Van Mastrigt O, Block DE, Notebaart RA, Smid EJ. Nitrogenous compound utilization and production of volatile organic compounds among commercial wine yeasts highlight strain-specific metabolic diversity. Microbiology spectrum. 2021 Aug 31;9(1):10-128.</p><p>Contact: Dr. William T. Scott (william.scott@wur.nl) or Dr. Eddy J. Smid (eddy.smid@wur.nl) for more information</p>
Data from: Enhancing fermentation performance through the reutilisation of wine yeast lees
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Data from: A population genomics insight into the Mediterranean origins of wine yeast domestication
The domestication of the wine yeast Saccharomyces cerevisiae is thought to be contemporary with the development and expansion of viticulture along the Mediterranean basin. Until now, the unavailability of wild lineages prevented the identification of the closest wild relatives of wine yeasts. Here, we enlarge the collection of natural lineages and employ whole-genome data of oak-associated wild isolates to study a balanced number of anthropic and natural S. cerevisiae strains. We identified industrial variants and new geographically delimited populations, including a novel Mediterranean oak population. This population is the closest relative of the wine lineage as shown by a weak population structure and further supported by genomewide population analyses. A coalescent model considering partial isolation with asymmetrical migration, mostly from the wild group into the Wine group, and population growth, was found to be best supported by the data. Importantly, divergence time estimates between the two populations agree with historical evidence for winemaking. We show that three horizontally transmitted regions, previously described to contain genes relevant to wine fermentation, are present in the Wine group but not in the Mediterranean oak group. This represents a major discontinuity between the two populations and is likely to denote a domestication fingerprint in wine yeasts. Taken together, these results indicate that Mediterranean oaks harbour the wild genetic stock of domesticated wine yeasts.
Data from: Genomic signatures of adaptation to wine biological aging conditions in biofilm-forming flor yeasts
The molecular and evolutionary processes underlying fungal domestication remain largely unknown despite the importance of fungi to bioindustry and for comparative adaptation genomics in eukaryotes. Wine fermentation and biological aging are performed by strains of S. cerevisiae with, respectively, pelagic fermentative growth on glucose, and biofilm aerobic growth utilizing ethanol. Here, we use environmental samples of wine and flor yeasts to investigate the genomic basis of yeast adaptation to contrasted anthropogenic environments. Phylogenetic inference and population structure analysis based on single nucleotide polymorphisms (SNPs) revealed a group of flor yeasts separated from wine yeasts. A combination of methods revealed several highly differentiated regions between wine and flor yeasts, and analyses using codon-substitution models for detecting molecular adaptation identified sites under positive selection in the high affinity transporter gene ZRT1. The Cross Population Composite Likelihood Ratio (XP-CLR) revealed selective sweeps at three regions, including in the hexose transporter gene HXT7, the yapsin gene YPS6 and the membrane protein coding gene MTS27. Our analyses also revealed that the biological aging environment has led to the accumulation of numerous mutations in proteins from several networks, including Flo11 regulation and divalent metal transport. Together, our findings suggest that the tuning of FLO11 expression and zinc transport networks are a distinctive feature of the genetic changes underlying the domestication of flor yeasts. Our study highlights the multiplicity of genomic changes underlying yeast adaptation to man-made habitats, and reveals that flor/wine yeast lineage can serve as a useful model for studying the genomics of adaptive divergence.
Data from: A population genomics insight into the Mediterranean origins of wine yeast domestication
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Data from: Genomic signatures of adaptation to wine biological aging conditions in biofilm-forming flor yeasts
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Data from: Adaptive divergence in wine yeasts and their wild relatives suggests a prominent role for introgressions and rapid evolution at non coding sites
In Saccharomyces cerevisiae, the main yeast in wine fermentation, the opportunity to examine divergence at the molecular level between a domesticated lineage and its wild counterpart arose recently due to the identification of the closest relatives of wine strains, a wild population associated with Mediterranean oaks. Since genomic data is available for a considerable number of representatives belonging to both groups, we used population genomics to estimate the degree and distribution of nucleotide variation between wine yeasts and their closest wild relatives. We found widespread genome-wide divergence, particularly at non-coding sites, which, together with above average divergence in trans-acting DNA binding proteins, may suggest an important role for divergence at the level of transcriptional regulation. Nine outlier regions putatively under strong divergent selection were highlighted by a genome wide scan under stringent conditions. Several cases of introgressions originating in the sibling species S. paradoxus, were also identified in the Mediterranean oak population. FFZ1 and SSU1, mostly known for conferring sulphite resistance in wine yeasts, were among the introgressed genes, although not fixed. Because the introgressions detected in our study are not found in wine strains, we hypothesise that ongoing divergent ecological selection segregates the two forms between the different niches. Together, our results provide a first insight into the extent and kind of divergence between wine yeasts and their closest wild relatives.
The AWRI wine microorganism yeast and bacterial screening collection
<p>The AWRI Wine Microbial Culture Collection (AWMCC) contains an extensive collection of yeast and bacteria largely associated with winemaking. The AWMCC has been created from research collections, yeast deletion libraries, and commercial or environmental isolates. Between 2017 and today, the AWMCC has nearly doubled in size. Microbial strains within the collection are available to winemakers and researchers, enabling product experimentation and differentiation. New custom collections have been developed to facilitate high throughput screening of specific microbial genera. The strains available in these high-throughput collections are listed in this data repository.</p>
The AWRI wine microorganism yeast and bacterial screening collection
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Data from: Adaptive divergence in wine yeasts and their wild relatives suggests a prominent role for introgressions and rapid evolution at non coding sites
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A combined genetic and genomic approach uncovers molecular basis of wine yeast fermentation traits
GEO Series GSE26437. Saccharomyces cerevisiae. 40 samples. Type: Expression profiling by array.
Differential gene expression in high and low sulfide-producing yeast strains during wine fermentation
GEO Series GSE16215. Saccharomyces cerevisiae. 2 samples. Type: Expression profiling by array.
Transcriptomic analyses of three wine yeast strains duting their response to nitrogen availability
GEO Series GSE63187. Saccharomyces cerevisiae. 25 samples. Type: Expression profiling by array.
A genetic approach of wine yeast fermentation capacity in nitrogen-starvation reveals the key role of nitrogen signaling.
GEO Series GSE54389. Saccharomyces cerevisiae. 8 samples. Type: Genome variation profiling by array.
Comparative transcriptome analysis between an original and a recombinant wine yeast strain defective for KNR4/SMI1
GEO Series GSE26965. Saccharomyces cerevisiae. 6 samples. Type: Expression profiling by array.
Impact of PDR8 allelic variation on yeast transcriptome profile in wine fermentation condition.
GEO Series GSE41738. Saccharomyces cerevisiae. 6 samples. Type: Expression profiling by array.
Microarray-CGH of wine yeast strains
GEO Series GSE16941. Saccharomyces cerevisiae. 16 samples. Type: Genome variation profiling by array.
eQTL linkages in wine yeasts to decipher regulatory networks in wine fermentation
GEO Series GSE41025. Saccharomyces cerevisiae. 56 samples. Type: Expression profiling by array.
Regulation involved in difference in nitrogen requirements of Saccharomyces cerevisiae wine yeasts in alcoholic fermentation
GEO Series GSE50626. Saccharomyces cerevisiae. 16 samples. Type: Expression profiling by array.
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