Rayon d'Or B
Name of vine variety in France
Rayon d'Or
Origin
Rayon d’Or B or 4986 Seibel (interspecific hybrid) is derived from the crossbreeding of 405 Seibel and 2007 Seibel.
Synonymy
In France, this variety can officially be called "4986 Seibel" for plant propagating material.
Regulations
In France, Rayon d'Or B is officially listed in the "Catalogue of vine varieties".

This vine variety is likewise listed in the Catalogue of the Netherlands.
Use
Wine vine variety
Evolution of area under vines in France
1958 1968 2000 2008 2016
ha 6965 4412 7 7 7.3
Description
Identification signs include:
- the tip of the young shoot has a moderate coat of flat-lying hairs,
- young leaves are green,
- small pentagonal-shaped adult leaves, 5 or 7 lobes with a slightly open U-shaped or closed with overlapping lobes petiolar sinus, deep lateral sinuses, large teeth, short compared to width at base, convex sides; smooth and shiny leaf blade, upturned and funnel-shaped and the underside with a slight coat of upright hairs,
- round-shaped berries
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 131 223 239 178 188 244 236 251 249
Allel 2 131 248 243 186 188 260 240 257 271
Phenology
Bud burst: 1 day after Chasselas.
Grape maturité: period I, 1 and 1/2 weeks after Chasselas.
Suitability for cultivation and agronomic production
Rayon d’Or B is fairly fertile and can be short-pruned or moderately long-pruned. It is best to trellis this vine.
Sensitivity to diseases and pests
Rayon d’Or B resists well to downy mildew, black rot and to powdery mildew.
Technological potential
Grape clusters are moderate in size and compact. The berries are likewise moderate in size and very firm. Wine produces from Rayon d’Or B are somewhat heavy and ordinary.
Clonal selection in France
The only approved Rayon d'Or B clone carries the number 1199.
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 1. P. Galet, 1988, 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
1199  Hérault  IFV - INRA        
 2013  Languedoc-Roussillon        
         distinctive wines of the vine variety