scholarly journals Forest Saccharomyces paradoxus are robust to seasonal biotic and abiotic changes

2021 ◽  
Author(s):  
Primrose J. Boynton ◽  
Dominika Wloch‐Salamon ◽  
Doreen Landermann ◽  
Eva H. Stukenbrock
Keyword(s):  
Saccharomyces Paradoxus

scholarly journals Mitochondrial DNA duplication, recombination, and introgression during interspecific hybridization

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Silvia Bágeľová Poláková ◽  
Žaneta Lichtner ◽  
Tomáš Szemes ◽  
Martina Smolejová ◽  
Pavol Sulo
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Mitochondrial Dna ◽  
Interspecific Hybridization ◽  
Mobile Elements ◽  
Variable Length ◽  
Mitochondrial Genomes ◽  
Free Standing ◽  
Saccharomyces Paradoxus ◽  
Mtdna Recombination

AbstractmtDNA recombination events in yeasts are known, but altered mitochondrial genomes were not completed. Therefore, we analyzed recombined mtDNAs in six Saccharomyces cerevisiae × Saccharomyces paradoxus hybrids in detail. Assembled molecules contain mostly segments with variable length introgressed to other mtDNA. All recombination sites are in the vicinity of the mobile elements, introns in cox1, cob genes and free standing ORF1, ORF4. The transplaced regions involve co-converted proximal exon regions. Thus, these selfish elements are beneficial to the host if the mother molecule is challenged with another molecule for transmission to the progeny. They trigger mtDNA recombination ensuring the transfer of adjacent regions, into the progeny of recombinant molecules. The recombination of the large segments may result in mitotically stable duplication of several genes.

Isolation, screening, identification and tolerance of yeast in cherry wine lees

2020 ◽  
Vol 16 (9) ◽  
Author(s):  
Cheng Xu ◽  
Hui Xia ◽  
Shuwen Zhang ◽  
Yuping Zhao ◽  
Zhiqiang Qi ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Potassium Chloride ◽  
Rose Bengal ◽  
Morphological Observation ◽  
Good Tolerance ◽  
Saccharomyces Paradoxus ◽  
Subsequent Application ◽  
Biological Identification ◽  
Tolerance Study ◽  
Saccharomyces Kudriavzevii

AbstractIn this study, yeast was isolated from cherry wine lees by rose Bengal medium, and its species was identified through three-stage screening, morphological observation and molecular biological identification. Moreover, the tolerance of screened strains was studied. The results showed that 30 strains of yeast were isolated from cherry wine lees, and five strains of yeast were selected, which were named YJN10, YJN16, YJN18, YJN19 and YJN28. After preliminary appraisal, strain YJN10 was Saccharomyces kudriavzevii, strain YJN16 was Saccharomyces paradoxus, and strains YJN18, YJN19, YJN28 were Saccharomyces cerevisiae. In the tolerance study, the tolerable sugar concentrations of the five strains were 650, 650, 550, 600 and 600 g/L. The tolerable alcohol volume fractions were 20, 20, 16, 18 and 18%. The tolerable molar concentration of potassium chloride was 1.8, 1.8, 1.5, 1.5 and 1.5 mol/L. Finally, strains YJN10, YJN16, YJN19 and YJN28 showed good tolerance, which laid a foundation for subsequent application in cherry wine fermentation.

scholarly journals The Timing and Direction of Introgression Under the Multispecies Network Coalescent

Genetics ◽  
2019 ◽  
Vol 211 (3) ◽  
pp. 1059-1073 ◽  
Author(s):  
Mark S. Hibbins ◽  
Matthew W. Hahn
Keyword(s):  
Statistical Methods ◽  
Biological Process ◽  
Genomic Data ◽  
Hybrid Speciation ◽  
Saccharomyces Paradoxus ◽  
Genomic Signatures ◽  
Wild Yeast ◽  
Other Information ◽  
Homoploid Hybrid ◽  
New Statistics

Introgression is a pervasive biological process, and many statistical methods have been developed to infer its presence from genomic data. However, many of the consequences and genomic signatures of introgression remain unexplored from a methodological standpoint. Here, we develop a model for the timing and direction of introgression based on the multispecies network coalescent, and from it suggest new approaches for testing introgression hypotheses. We suggest two new statistics, D1 and D2, which can be used in conjunction with other information to test hypotheses relating to the timing and direction of introgression, respectively. D1 may find use in evaluating cases of homoploid hybrid speciation (HHS), while D2 provides a four-taxon test for polarizing introgression. Although analytical expectations for our statistics require a number of assumptions to be met, we show how simulations can be used to test hypotheses about introgression when these assumptions are violated. We apply the D1 statistic to genomic data from the wild yeast Saccharomyces paradoxus—a proposed example of HHS—demonstrating its use as a test of this model. These methods provide new and powerful ways to address questions relating to the timing and direction of introgression.

scholarly journals Saccharomyces paradoxus Transcriptional Alterations in Cells of Distinct Phenotype and Viral dsRNA Content

2020 ◽  
Vol 8 (12) ◽  
pp. 1902
Author(s):  
Bazilė Ravoitytė ◽  
Juliana Lukša ◽  
Vyacheslav Yurchenko ◽  
Saulius Serva ◽  
Elena Servienė
Keyword(s):  
Food Industry ◽  
Antifungal Agents ◽  
Acid Biosynthesis ◽  
Viral Dsrna ◽  
Saccharomyces Paradoxus ◽  
Distinct Phenotype ◽  
Transcriptional Alterations ◽  
Potential Applications ◽  
Dsrna Viruses ◽  
First Time

Killer yeasts are attractive antifungal agents with great potential applications in the food industry. Natural Saccharomyces paradoxus isolates provide new dsRNA-based killer systems available for investigation. The presence of viral dsRNA may alter transcriptional profile of S. paradoxus. To test this possibility, a high-throughput RNA sequencing was employed to compare the transcriptomes of S. paradoxus AML 15-66 K66 killer strains after curing them of either M-66 alone or both M-66 and L-A-66 dsRNA viruses. The S. paradoxus cells cured of viral dsRNA(s) showed respiration deficient or altered sporulation patterns. We have identified numerous changes in the transcription profile of genes including those linked to ribosomes and amino acid biosynthesis, as well as mitochondrial function. Our work advance studies of transcriptional adaptations of Saccharomyces spp. induced by changes in phenotype and set of dsRNA viruses, reported for the first time.

scholarly journals Suppressive Effect of Wild Saccharomyces cerevisiae and Saccharomyces paradoxus Strains on Ige Production by Mouse Spleen Cells

2013 ◽  
Vol 19 (6) ◽  
pp. 1019-1027 ◽  
Author(s):  
Takeshi KAWAHARA ◽  
Daichi NAKAYAMA ◽  
Keisuke TODA ◽  
Shyuichiro INAGAKI ◽  
Katsumi TANAKA ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Suppressive Effect ◽  
Mouse Spleen ◽  
Spleen Cells ◽  
Saccharomyces Paradoxus

scholarly journals The spatial scale of genetic differentiation in a model organism: the wild yeast Saccharomyces paradoxus

2006 ◽  
Vol 361 (1475) ◽  
pp. 1941-1946 ◽  
Author(s):  
Vassiliki Koufopanou ◽  
Joseph Hughes ◽  
Graham Bell ◽  
Austin Burt
Keyword(s):  
Genetic Differentiation ◽  
Population Genomics ◽  
Model Organism ◽  
Physical Distance ◽  
Saccharomyces Paradoxus ◽  
Population Genetic Differentiation ◽  
Wild Yeast ◽  
Oak Trees ◽  
Eukaryotic Microbes ◽  
Well Differentiated

Little information is presently available on the factors promoting genetic divergence in eukaryotic microbes. We studied the spatial distribution of genetic variation in Saccharomyces paradoxus , the wild relative of Saccharomyces cerevisiae , from the scale of a few centimetres on individual oak trees to thousands of kilometres across different continents. Genealogical analysis of six loci shows that isolates from Europe form a single recombining population, and within this population genetic differentiation increases with physical distance. Between different continents, strains are more divergent and genealogically independent, indicating well-differentiated lineages that may be in the process of speciation. Such replicated populations will be useful for studies in population genomics.

Saccharomyces paradoxus and Saccharomyces cerevisiae are associated with exudates of North American oaks

1998 ◽  
Vol 44 (11) ◽  
pp. 1045-1050 ◽  
Author(s):  
Gennadi I Naumov ◽  
Elena S Naumova ◽  
Paul D Sniegowski
Keyword(s):  
Saccharomyces Cerevisiae ◽  
North American ◽  
Sensu Stricto ◽  
Biological Species ◽  
Saccharomyces Paradoxus ◽  
Saccharomyces Sensu Stricto ◽  
Ty Elements ◽  
Electrophoretic Karyotyping ◽  
Retrotransposable Element ◽  
First Time

Genetic hybridization and karyotypic analyses revealed the biological species Saccharomyces paradoxus and Saccharomyces cerevisiae in exudates from North American oaks for the first time. In addition, two strains collected from elm flux and from Drosophila by Phaff in 1961 and 1952 were reidentified as S. paradoxus. Each strain studied showed a unique profile of chromosomal hybridization with a probe for the retrotransposable element Ty1. The wild distribution of natural Saccharomyces sensu stricto yeasts is discussed.Key words: genetical taxonomy, Saccharomyces paradoxus, oak exudates, Ty elements, electrophoretic karyotyping.

scholarly journals Comparative genomics of the response to cold shock in Saccharomyces paradoxus and Saccharomyces cerevisiae (589.3)

2014 ◽  
Vol 28 (S1) ◽  
Author(s):  
Kam Dahlquist ◽  
Nicolette Harmon ◽  
Chidinma Amakiri ◽  
Katrina Sherbina ◽  
Nicholas Rohacz ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Comparative Genomics ◽  
Cold Shock ◽  
Saccharomyces Paradoxus
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