Chasan B
Name of vine variety in France
Chasan
Origin
This variety was obtained by INRA in 1958. Based on genetic analyses carried out in Montpellier, this variety is derived from the crossbreeding of  Listan B and Pinot.
Synonymy
There is no officially recognized synonym in France nor in other countries in the European Union.
Regulations
In France, Chasan B is officially listed in the "Catalogue of vine varieties".This variety is likewise listed in the Catalogue of Spain.
Use
Wine grape variety
Evolution of area under vines in France
1988 2000 2008 2016
ha 238 1058 960 457
Description
Identification signs include:
- the end of the young shoot is sparsely covered with flat-lying hairs, the young leaves are yellow, - the herbaceous shoot with red-color internodes,
- orbicular adult leaves are 7-lobed or more with an open petiolar sinus, U-shaped deep lateral sinus, medium teeth with straight sides, no anthocyanin pigmentation of veins and the underside is moderately covered with erect hairs. 
- round-shaped berries
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 143 225 239 182 194 240 240 216 239
Allel 2 149 236 239 182 194 252 248 247 255
Phenology
Bud burst: 3 days after Chasselas.
Grape maturity: period I, a half week after Chasselas
Suitability for cultivation and agronomic production
Chasan B must be trellised and short pruned due to it being a fertile and productive variety which grows long trailing branches.
Sensitivity to diseases and pests
This early variety resists very well to grey rot but is susceptible to phomopsis, powdery mildew and to a lesser extent to downy mildew and mites.
Technological potential
The grape clusters are very large and the berries are medium size. Chasan B produces aromatic products, but which are sensitive to oxidation. This variety is well suited to cool areas as acidity drops quickly during maturation and oftentimes drops to very low levels in southern regions.
Clonal selection in France
The only approved Chasan B clone carries the number 538
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
538    INRA        
 1976  Languedoc