Portan N
Name of vine variety in France
This vine variety obtained by INRA in 1958 is derived from the crossbreeding of Grenache N and Portugais bleu N.
In France, Portan N is officially listed in the "Catalogue of vine varieties".
Wine vine variety
Evolution of area under vines in France
1988 1998 2008 2016
ha 224 240 369 109
Identification signs include:
- the tip of the new shoot has a sparse coat of flat-lying hairs,
- the young leaves are green,
- pentagonal-shaped leaves with 5 lobes with a petiolar sinus with overlapping lobes; shallow lateral sinuses, moderate size teeth with convex or straight sides; an absence of anthocyanin coloration of veins; a jagged leaf blade, cupped and bubbled and the underside with an absence or very slight coat of upright and flat-lying hairs,
- round-shaped berries.
Genetic profile
Allel 1 141 223 239 191 188 250 240 227 249
Allel 2 143 238 243 191 188 258 248 243 271
Bud burst: 1 day before Chasselas. Grape maturity: period I, 1/2 week after Chasselas.
Suitability for cultivation and agronomic production
Portan N is very vigorous and must be trellissed and preferably long pruned. It is suited to moderately or not very fertile soils.
Sensitivity to diseases and pests
Portan N is susceptible to powdery mildew and phomopsis. It is however not very prone to grey rot due to its early nature.
Technological potential
Grape clusters and berries are moderate in size. Due to its early nature and its characteristics, Portan N can be used to make primeur wines or wines to be consumed quickly. The wines produced are not very tannic, but are well colored, moderately alcoholic and fruity.
Clonal selection in France
The only approved Portan N clone carries the number 537.
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
537    INRA        
 1976  Languedoc