Orbois B
Name of vine variety in France
Orbois
Origin
Based on published genetic analyses, this vine variety is probably a descendant of Gouais B. It would appear to originally be from the Loire Valley, more particularly from Touraine or the Loir-et-Cher region.
Synonymy
Regulations
In France, Orbois B if 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 1282 1455 1145 754 435 270 155
Description
Identification signs include:
- the young leaves are yellow with bronze patches with a dense to very dense coat of flat-lying hairs,
- herbaceous shoots with red internodes,
- adult leaves are small, whole or with shallow lateral sinuses, a V-shaped petiolar sinus or slightly open or closed lyre, short teeth compared to width at base, convex sides, heavy anthocyanin coloration of veins; an upturned leaf blade and the underside with a heavy coat of upright and flat-lying hairs,
- slightly elliptical-shaped berries.
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 141 229 239 176 188 238 248 227 271
Allel 2 149 238 243 186 196 246 252 235 271
Phenology
Bud burst: 3 days before Chasselas.

Grape maturity: period II, 2 and 1/2 weeks after Chasselas.
Suitability for cultivation and agronomic production
Moderate vigor and good fertility.
Sensitivity to diseases and pests
Despite having very compact grape clusters, Orbois B does not display great susceptibility to grey rot.
Technological potential
Grape clusters are moderate to large in size and the berries are small. Sugar accumulation in the berries potential is relatively high for a fairly low acidity level. It is especially used as a base wine for making blended wines with other grape varieties.
Clonal selection in France
The 3 approved Orbois B clones carry the numbers 205, 206 and 504. A conservatory with 50 clones was set up in spring 2007 in the Loir-et-Cher region.
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.
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
205  Loir-et-Cher  ENTAV        
 1973  Loir-et-Cher        
         
Little difference between the clones 205, 206 and 504 which have a small distribution. Higher susceptibility to millerandage for clone 206 has however been noted.
206  Loir-et-Cher  ENTAV        
 1973  Loir-et-Cher        
         
Little difference between the clones 205, 206 and 504 which have a small distribution. Higher susceptibility to millerandage for clone 206 has however been noted.
504  Loir-et-Cher  ENTAV        
 1976  Loir-et-Cher        
         
Little difference between the clones 205, 206 and 504 which have a small distribution. Higher susceptibility to millerandage for clone 206 has however been noted.