TABLE 1

Overview of main yeast strains used in this study

Strain codeStrain genotypeStrain source or reference
Natural strains
    Y115Wild type (S. cerevisiae)Bioethanol industry (China)
    Y181Wild type (S. cerevisiae)Wine industry (Europe)
    Y184Wild type (S. cerevisiae)Wine industry (Europe)
    Y274Wild type (P. kluyveri)Isolated from cocoa pulp fermentation (Indonesia)
    Y354Wild type (S. cerevisiae)Beer industry (ale) (Canada)
    Y397Wild type (S. cerevisiae)Beer industry (ale) (the Netherlands)
    Y689Wild type (Cyb. fabianii)Isolated from Xylion adustus (South Africa)
    Y927Wild type (S. cerevisiae)Isolated from cocoa pulp fermentation (Malaysia) (29)
Haploid segregants
    H28-S1Haploid segregant of H28 (α)29
    H28-S2Haploid segregant of H28 (α)29
    Y115-S1Haploid segregant of Y115 (a)29
    Y115-S2Haploid segregant of Y115 (a)29
    Y115-S3Haploid segregant of Y115 (α)29
    Y115-S4Haploid segregant of Y115 (α)29
    Y354-S6Haploid segregant of Y354 (α)23
    Y397-S2Haploid segregant of Y354 (a)23
Hybrids selected for pilot-scale fermentations
    H28Hybrid Y115 × Y92729
    H40Hybrid H28-S1 × Y397-S2This study
    H42Hybrid Y115-S3 × Y397-S2This study
    H57Hybrid Y927 × Y184This study
Screening reference strain
    W303Wild typeNCYC 3467