Table 1 Name and description of yeast strains used in this study and selected following a literature review of the Guinness archives.
Yeast | Name | Source | Brewing group |
|---|---|---|---|
Irish Draught Stout 1* | IDS1 | 1959 St James’s Gate Pitching Yeast | Guinness |
Irish Draught Stout 2* | IDS2 | 1959 St James’s Gate Pitching Yeast | Guinness |
Foreign Extra Stout 1* | FES 1 | Class I mutant from IDS | Guinness |
Foreign Extra Stout 2* | FES 2 | Class I mutant from IDS | Guinness |
Foreign Extra Stout 3* | FES 3 | Class I mutant from IDS | Guinness |
1947 | 1947 | 1947 St James’s Gate Pitching Yeast | Guinness |
1950 | 1950 | 1950 St James’s Gate Pitching Yeast | Guinness |
1955 | 1955 | 1955 St James’s Gate Pitching Yeast Pitching yeast | Guinness |
1959 brewing yeast | 59 BY | Co-flocculant yeast used with IDS between 1959 and 1963 to aid beer processing | Guinness |
1959 | 1959 | 1959 St James’s Gate Pitching Yeast | Guinness |
Ikeja | Ikeja | Yeast selected from the 1959 St James’s Gate Pitching Yeast. Used in the first Guinness African Brewery, Ikeja, Lagos, Nigeria | Guinness |
1960 | 1960 | Yeast reselected from 1947 St James’s Gate Pitching Yeast | Guinness |
1981 | 1981 | Yeast reselected from IDS | Guinness |
Park Royal 1960 | PR1960 | 1960 Guinness Park Royal Brewery Pitching Yeast | Guinness |
Park Royal 1979 | PR1979 | 1979 Guinness Park Royal Brewery Pitching Yeast | Guinness |
Park Royal 1986 | PR1986 | 1986 Guinness Park Royal Brewery Pitching Yeast | Guinness |
Cherry | Cherry 1960 | Cherry’s Pitching Yeast | Cherry |
Great Northern Brewery 1958 | GNB 1958 | Great Northern Brewery Stout Pitching Yeast | GNB |
Macardle 1965 | Macardle 1965 | 1965 Macardle Pitching Yeast | Macardle Moore |
Macardle 1993 | Macardle 1993 | 1970 Smithwick’s Pitching latterly used as Macardles Pitching Yeast | Macardle Moore |
Perry | Perry 1967 | 1967 Perry Pitching Yeast | Perry |
Smithwicks* | Smithwicks 1986 | 1986 Smithwicks Production Yeast | Smithwick’s |
