Cultivar · Barley cultivar
Golden Promise
Golden Promise is a semi-dwarf two-row spring malting barley derived by gamma-ray mutation of the cultivar Maythorpe, historically important in Scottish malting and whisky and now a widely used model genotype in barley research and transformation.
Record
Cultivar / variety- Variety of
- Barley
- Botanical taxon
- Hordeum vulgare
- Type
- Cultivar
- Breeding method
- Induced mutation (gamma-ray mutagenesis of the cultivar Maythorpe)
- Origin
- United Kingdom
- Breeder / institution
- Miln Marsters (breeding company)
- Registry status
- Historical · as of 2026-07-12
- Adaptation
- A spring barley historically grown in Scotland and northern Britain, and long associated with malting for the Scotch whisky industry.
- Intended use
- Malting barley (brewing and distilling), Widely used model genotype in barley research and transformation
Registry listing or variety protection is jurisdiction- and date-specific and does not by itself indicate current commercial availability, universal cultivation approval, patent status, or a recommendation.
Golden Promise is a two-row spring malting barley (Hordeum vulgare) that originated as a semi-dwarf mutant. Seed of the older cultivar Maythorpe was treated with gamma radiation, and Golden Promise was isolated from the resulting mutants for its short, stiff straw and malting suitability. It was released in the late 1960s and first recommended for growing in Scotland in 1968.
The short stature is largely due to an induced dwarfing mutation (the ari-e.GP allele), and the small, even grain made the variety well suited to malt production, including for distilling. Golden Promise became closely associated with Scottish malting and the Scotch whisky industry, and it is also widely used in the laboratory as a barley "transformation reference" cultivar.
Origin and mutation breeding
Golden Promise is a classic example of mutation breeding. Seed of the spring barley Maythorpe was irradiated with gamma rays, and a large number of resulting lines were screened for improved stature and agronomic characteristics. Golden Promise was selected for its short, stiff straw — the result of an induced dwarfing mutation — and its malting suitability.
Released in the late 1960s and first recommended in Scotland in 1968, it went on to be grown for several decades and remained associated with distilling malt long after newer varieties appeared.
Use in research
Because Golden Promise is comparatively amenable to genetic transformation, it has become a standard model genotype in barley research and a "transformation reference" cultivar, with a genome assembly produced to support that work.
Scope & limitations
Geographic scope: Documented United Kingdom two-row spring malting barley, historically important in Scotland and now widely used as a research model; adaptation and performance are region- and season-specific.
Climate context: A spring malting barley historically grown in Scotland and northern Britain.
- Adaptation and trait notes are region- and season-specific, and performance varies by environment.
- Reported release dates vary in the literature (generally the late 1960s), so no single release year is asserted here; the current commercial registration status of the cultivar is likewise not asserted.
Sources
This article draws on the following authoritative sources. See our sources & methodology for how they are selected.
- High
Cited for: Classification of Hordeum vulgare and Golden Promise genome resources
- Type:
- Reference database
- Jurisdiction:
- Global
- Accessed:
- 2026-07-12
- [2]GRIN-Global / National Plant Germplasm System (opens in a new tab)Authoritative
USDA Agricultural Research Service (ARS)
Cited for: Barley germplasm accession and characterization
- Type:
- Official registry
- Jurisdiction:
- United States / Global
- Accessed:
- 2026-07-12