Grolleau N
Name of vine variety in France
Grolleau
Origin
This variety is undoubtedly from the Touraine region and based on published genetic analyses, it is probably a descendant of Gouais.
Synonymy
There is no officially recognized synonym in France nor in the other countries of the European Union, for this variety.
Regulations
In France, Grolleau is officially listed in the "Catalogue of vine varieties" on the A list and classified.
Use
Wine grape variety.
Evolution of area under vines in France
1958 1968 1979 1988 1998 2008 2018
ha 11409 9725 5869 3837 2488 2406 2070
Description
The identification is based on:
- the tip of the young shoot with a high density of prostate hairs,
- the yellow young leaves with bronze spots,
- the shoots with red internodes,
- the large adult leaves, with three or five lobes, an open petiole sinus, large teeth with straight sides, an involute, blistered, sometimes goffered leaf blade, and on the lower side of the leaves, a low density of erect and prostate hairs,
- the round-shaped berries.
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 131 236 247 172 204 244 240 243 239
Allel 2 141 238 249 178 204 252 254 245 271
Phenology
Bud burst: 1 day before Chasselas.
Grape maturity: mid-season, 2 weeks after Chasselas.
Suitability for cultivation and agronomic production
This fertile variety is susceptible to browning and must be pruned short with a low load. The young shoots are quite sentitive to the wind. This variety has an acceptable production even after spring frost.
Sensitivity to diseases and pests
Grolleau is susceptible to peduncular rot and phomopsis.
Technological potential
The bunches and berries are medium in size. Grolleau produces light, not very colored wines with a low alcohol degree. It is especially used for the production of rosé wines (or grey wines) or sparkling wines. It is also used to produce supple and fruity red wines when yields are managed.
Clonal selection in France
The five certified Grolleau clones carry the numbers 226, 288, 364, 365 and 366. A conservatory of more than 200 clones was planted in the Anjou region in 1996.
Bibliographic references
- Catalogue des variétés et clones de vigne cultivés en France. Collectif, 2007, Ed. IFV, Le Grau-du-Roi, France.
- Documentary collections of the Centre de Ressources Biologiques de la Vigne de Vassal-Montpellier, INRAE - Montpellier SupAgro, Marseillan, France.
- Dictionnaire encyclopédique des cépages et de leurs synonymes. P. Galet, 2015, Ed. Libre&Solidaire, France.
- Traité général de viticulture, Ampélographie. P. Viala and V. Vermorel, 1901-1909, Ed. Masson, Paris, France.
Description of clones approved in France
Identity and availability Agronomic data Technical data
Clone number Origin Selection Fertility Production level Sugar content Potential color
Year approved Agronomic references Weight of grape clusters Vigor Total acidity Tannic structure
Growing surface area Size of berries Sensitivity to Botrytis Aromatic intensity Oenological aptitudes
226  Maine-et-Loire  ENTAV        
 1973  Val-de-Loire        
 0.24 ha        
Clone carrier of leaf roll virus2.
Little difference between the 226, 288 and 365, all of which have demonstrated high production levels.
288  Indre-et-Loire  ENTAV        
 1973  Val-de-Loire        
 0.56 ha        
Little difference between the 226, 288 and 365, all of which have demonstrated high production levels.
364  Indre-et-Loire  ENTAV        
 1975  Val-de-Loire        
         
Small distribution clone
365  Indre-et-Loire  ENTAV        
 1975  Val-de-Loire        
 0.24 ha        
Little difference between the 226, 288 and 365, all of which have demonstrated high production levels.
366  Indre-et-Loire  ENTAV    medium  medium to high  
 1975  Val-de-Loire        
 0.46 ha