Danlas B
Name of vine variety in France
Danlas
Origin
This variety was obtained in 1958 by INRA by crossbreeding Dabouki B and Chasselas B.
Synonymy
No synonym is officially recognized in France, nor in other countries of the European Union.
Regulations
In France, Danlas B is officially listed in the "Catalogue of vine varieties".

This variety is likewise listed in the Catalogue of Portugal.
Use
Wine and table grape variety
Evolution of area under vines in France
1979 1988 2000 2008 2016
ha 7 109 321 263 152
Description
Identification signs include:
- the tip of the young shoot has a moderate coat of flat-lying hairs,
- the young leaves are reddish with shoots which have a heavy anthocyanin pigmentation of the nodes and the internodes
- adult leaves are pentagonal, 5 or 7 lobes with a slightly open or closed V-shaped petiolar sinus with slightly overlapping lobes, large teeth, moderate in size compared to width at base, straight sides, moderate to heavy anthocyanin pigmentation of nerves, moderately bubbled leaf blade, jagged and the underside with a slight coat of upright hairs and an absence or very slight coat of flat-lying hairs,
- round-shaped berries.
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 131 225 239 176 188 248 240 216 239
Allel 2 149 232 249 182 194 252 244 257 271
Phenology
Bud burst: 5 days after Chasselas.
Grape maturity: period I, 1 and 1/2 weeks after Chasselas.
Suitability for cultivation and agronomic production
Danlas B displays strong vigor and horizontal growth. As it is wind sensitive, it must be trained and long pruned. It is not very prone to  millerandage and coulure.
Sensitivity to diseases and pests
Danlas B is very susceptible to dead arm disease, downy and powdery mildew. On the other hand, it is not very prone to grey rot.
Technological potential
Danlas B grape clusters are large, moderately compact with a long and pigmented stalk. Homogeneous clusters, easy to pick and package and the berries are moderate to large in size. The skin is thick and the pulp relatively juicy, soft with a neutral flavor. Well suited for transportation and conservation. When vinified,  Danlas B produces ordinary and not very aromatic wines.
Clonal selection in France
The only approved Danlas B clone carries the number 499.
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
499    INRA        
 1976