Admirable de Courtiller B
Name of vine variety in France
Admirable de Courtiller
Origin
This variety was obtained by Mr. Courtiller in the 19th century in the Saumur region. Based on genetic analyses carried out in Montpellier, it was derived from the crossbreeding of Bicane B and Chasselas.
Synonymy
No synonym is officially recognized in France, nor in any other country in the European Union, for this variety.
Regulations
In France, Admirable de Courtiller B is officially listed in the "Catalogue of vine varieties".
Use
Table grape variety.
Evolution of area under vines in France
1958 1968 1979 2000 2008 2016
ha 909 898 369 35 22 8.9
Description
Identification signs include:
- the tip of the young shoot have a moderate to heavy coat of flat-lying hairs, 
- the young leaves are green with bronze patches,
-adult leaves are pentagonal shaped, 5 or 7 lobes with a U-shaped petiolar sinus, slightly open or with slightly overlapping lobes, moderate teeth with convex sides, an absence of anthocyanin pigmentation of veins, smooth leaf blade, shiny and the lower side with a moderate coat of upright hairs and an absence or just slight coat of flat-lying hairs, 
- the berries are elliptical or ovoid-shaped with a skin which can become slightly pink when overripe.
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 131 223 239 182 188 252 240 233 239
Allel 2 135 234 243 191 194 258 254 267 239
Phenology
Bud burst: 2 days after Chasselas. Grape maturity: period I, 1 week after Chasselas.
Suitability for cultivation and agronomic production
Admirable de Courtiller B displays low to moderate vigor and has semi-upright growth.  Moderate yield potential. It has a tendancy to grow considerable  grappillons and is sometimes sensitive to coulure and millerandage. It is preferable to grow Admirable de Courtiller B on dry and well-exposed terrains.
Sensitivity to diseases and pests
Admirable de Courtiller B is not very sensitive to rot.
Technological potential
Admirable de Courtiller B grape clusters are moderate size and not very compact. The berries are moderate to large size, simple flavor with a thin to moderate skin and juicy pulp.
Clonal selection in France
There are no approved clones for this variety at the present time.
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.
- Traité général de viticulture, Ampélographie. P. Viala et V. Vermorel, 1901-1910, Ed. Masson, Paris.