Delhro N
Name of vine variety in France
Delhro
Origin
This variety was selected by  INRA and was obtained in 1959 by crossbreeding Alphonse Lavallée N and Perle de Csaba B.
Synonymy
No synonym is officially recognized in France, nor in other countries of the European Union.
Regulations
In France, Delhro N is officially listed in the "Catalogue of vine varieties".
Use
Table grape variety
Evolution of area under vines in France
2000 2016
ha 4 0
Description
Identification signs include:
- the tip of the young shoor has a moderate to heavy coat of flat-lying hairs,
- young leaves are green,
- orbicular-shaped adult leaves, 3 or 5 lobes with a slightly open or closed U-shaped petiolar sinus base with slightly overalpping lobes; short to moderate size teeth, straight sides, an absence or very slight anthocyanin pigmentation of evines; a moderately bubbled leaf blade and the underside with a slight to moderate coat of upright and flat-lying hairs,
- round-shaped berries.
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 131 234 247 178 204 240 238 243 271
Allel 2 153 236 255 182 204 256 240 267 271
Phenology
Bud burst: 2 days before Chasselas.
Grape maturity: early, 1 and 1/2 to 2 weeks before Chasselas.
Suitability for cultivation and agronomic production
Delhro N displays moderate vigor and grows semi-erect to horizontal. It is fairly fertile and can be managed with short or moderately long pruning.  It is somewhat susceptible to millerandage.
Sensitivity to diseases and pests
Delhro N is not very susceptible to grey rot.
Technological potential
Delhro N grape clusters are moderate in size. the berries are small to moderate size with homogenous color. The pulp is firm and juicy with a simple flavor. Delhro N displays good storage and transportation capacity.
Clonal selection in France
The only approved Delhro N clone carries the number 781.
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
781  Non précisée  ENTAV        
 1981