Yeast strains for improved ethanol production
AssigneePioneer Hi-Bred International, Inc.
InventorsKimberly J. Forrester, William Rutherford, Doug M. Haefele
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Abstract
Novel strains of yeast and methods for improved ethanol production utilizing the yeast strains are disclosed. In particular, the novel yeast strains Saccharomyces cerevisae YE1358 and YE1615 provide for increased fermentation temperature tolerance, as well as tolerance to increased levels of glucose and ethanol, and thereby provide increased ethanol production as compared to ethanol industry standard strains of Saccharomyces cerevisae. The novel yeast strains also generate decreased residual glucose than the ethanol industry standard yeasts.
Claims20
An isolated Saccharomyces cerevisae yeast strain selected from the group consisting of:
- Saccharomyces cerevisae strain YE1358 having NRRL Accession No. XXXX;
- Saccharomyces cerevisae strain YE1615 having NRRL Accession No. YYYY;
- and yeast strains, which are mutants or derivatives of strain YE1358 or strain YE1615, said mutants and derivatives comprising the ethanol production, thermotolerance, glucose tolerance, and ethanol tolerance properties of at least one of strains YE1358 and YE1615.
A method for producing ethanol comprising culturing a yeast strain in a medium comprising a saccharide, wherein the yeast strain is selected from the group consisting of:
- Saccharomyces cerevisae strain YE1358 having NRRL Accession No. XXXX;
- Saccharomyces cerevisae strain YE1615 having NRRL Accession No. YYYY;
- and yeast strains, which are mutants or derivatives of strain YE1358 or strain YE1615, said mutants and derivatives comprising the ethanol production, thermotolerance, glucose tolerance, and ethanol tolerance properties of at least one of strains YE1358 and YE1615.
A method for increasing ethanol production by fermentation comprising culturing a yeast strain in a medium comprising a saccharide, wherein the yeast strain is selected from the group consisting of:
- Saccharomyces cerevisae strain YE1358 having NRRL Accession No. XXXX;
- Saccharomyces cerevisae strain YE1615 having NRRL Accession No. YYYY;
- and yeast strains, which are mutants or derivatives of strain YE1358 or strain YE1615, said mutants and derivatives comprising the ethanol production, thermotolerance, glucose tolerance, and ethanol tolerance properties of at least one of strains YE1358 and YE1615.
Dependencies are inferred from the claim text.