- Vine variety information
(originally known as Gf. 67-198-3)
Mother: Diana (Silvaner x Müller-Thurgau)
Father: Chambourcin (J.S. 26 205: = Villard blanc x Chancellor (Seibel 7053))
A red Piwi/disease-resistant variety.
It is one of the most important new disease-resistant quality
grape varieties world-wide and supplies colour-intensive strong red wines.
Year of breeding: 1967, by Professor Dr. Gerhardt Alleweldt
Country of origin: Germany
Breeder/License holder: Bundesforschungsanstalt für Rebenzüchtung Geilweilerhof,
Number of clones: 1 (GF1)
Named after the famous Regent diamond from India
Year of entry into the German Federal Office's Varieties Register: 1995/1996
Area planted in Germany in 2000: 350 hectares, and in 2004: 2037 hectares
Area planted in England (as at August 2004): large numbers of vines have been planted.
Wine Character - colour: deep red
photo from www.weingut-fuchs.de
- palate: full bodied, Bordeaux style, sometimes hints of blackcurrant
Time of bud-burst: in Germany earlier than Müller-Thurgau; in UK it is late
Strength of growth: medium, fairly upright
Growth of side-shoots: low
Flowering strength: medium
Leaf: - size:
- surface undulation:
- petiolar sinus:
Grape bunch: - size: medium
- density: medium
Berries: - size: small to
- skin colour: red-blue
(the juice is coloured)
The berries fall off when very ripe.
Time of veraison:
Time of harvest: middle-early
Grape yield: medium (slightly above Pinot Noir)
Must-weight: high (2 Oe above Pinot Noir)
Must-acidity: medium (3 g/l below Pinot Noir)
Susceptibility to - Oidium: low
- Peronospora: very low
- Botrytis: low
- Roter Brenner: high
Preferred soil: susceptible to magnesium deficiency.
Suitable rootstocks: according to the soil.
Normal stem height:
Normal row spacing: 1.8 to 2.0m
Vine spacing in the row:
Winter Pruning: 8 to 10
eyes/buds per sq. metre of land occupied by the plant.
Advantages: Probably the most disease-resistant red wine variety.
A short fermentation on the skins is sufficient for colour extraction. Very high
Disadvantages: Cold and windy sites should be avoided (to minimise coulure).