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 B.
Synonymy
No synonym is officially recognized in France for this variety, nor in other countries in the European Union.
Regulations
In France, Grolleau N is officially listed in the "Catalogue of vine varieties".
Use
Wine vine variety.
Evolution of area under vines in France
1958 1968 1979 1988 1998 2008 2016
ha 11409 9725 5869 3837 2488 2406 2080
Description
Identificationsigns include:
- the tip of the young shoots has a heavy coat of flat-lying hairs
- the young leaves are yellow with bronze patches,
- the shoots have red internodes,
- adult leaves are large, 3 or 5 lobes with an open petiolar sinus, large teeth with straight sides; an upturned leaf blade, bubbled, sometimes cupped and the underside with a slight coat of flat-lying and upright hairs,
- 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: period II, 2 weeks after Chasselas.
Suitability for cultivation and agronomic production
This fertile vine variety is susceptible to brown rust and must be short pruned with a low load. The young shoots are not very wind resistant. This variety has an acceptable production even after spring frost.
Sensitivity to diseases and pests
Grolleau N is susceptible to peduncular rot and dead arm disease.
Technological potential
Grape clusters and berries are moderate in size. Grolleau N produces light, not colored and low alcoholic wines. It is especially used for making rosé or gris or sparkling wines. It is also used to produce supple and fruity red wine when yields are managed.
Clonal selection in France
The 5 approved Grolleau N clones carry the numbers 226, 288, 364, 365 and 366. A conservatory including approximately 200 clones was set up 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.
- Documentation interne du Domaine de Vassal. 1949-2011, INRA, Marseillan-plage.
- Cépages et vignobles de France, tome 2. P. Galet, 1990, Ed. Dehan, Montpellier.
- Ampélographie. P. Viala et V. Vermorel, 1902-1910, Ed. Masson, Paris.
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