Cot N
Name of vine variety in France
Cot
Origin
This variety is originally from the south west of France. Based on genetic analysis carried out in Montpellier, it would be the result of the crossbreeding between Magdeleine noire des Charentes and Prunelard.
Synonymy
In France, this variety can officially be called "Malbec" regarding plant propogating material. In the European Union, Cot can officially be called by other names: Malbec (Spain, Czech Republic), Malbech (Italy) and Malbek (Austria).
Regulations
In France, Cot is officially listed in the "Catalogue of vine varieties" on the A list and classified. This variety is also listed in the catalogues of other Member States of the European Union: Austria, Bulgaria, Czech Republic, Italy and Spain.
Use
Wine grape variety.
Evolution of area under vines in France
1958 1968 1979 1988 2000 2008 2018
ha 10752 9765 4801 5279 6166 6676 7625
Description
The identification is based on:
- the tip of the young shoot, with a high density of prostate hairs,
- the green young leaves with bronze spots,
- the adult leaves, entire or with three lobes, with a U or V-shaped open petiole sinus, small teeth, long compared to their width at the base with straight sides, a revolute leaf blade, undulate between the veins near the petiole sinus, and on the lower side of the leaves, a low to medium density of prostate hairs,
- the round-shaped berries
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 131 225 239 186 188 246 238 233 239
Allel 2 149 236 262 188 202 260 248 267 251
Phenology
Bud burst: 4 days after Chasselas.
Grape maturity: mid-season, 2 weeks and a half after Chasselas
Suitability for cultivation and agronomic production
This vigorous variety is sensitive to coulure, but clonal selection has greatly reduced this defect. Plant vigor should be managed by high density plantations and by using low-productive rootstock. This variety is fairly sensitive to winter frosts during the first years after plantation. Following spring frosts, the shoots from secondary buds are not very fertile. At maturity, there is sometimes the risk of berry shedding.
Sensitivity to diseases and pests
Cot does not seem particularly sensitive to fungal diseases except perhaps to phomopsis. It is also senstive to leafhoppers.
Technological potential
The bunches and berries are medium in size. With a well-managed production, this early variety can produce quite colorful, aromatic and tannic wines with good ageing capacity. Rosé wine-making also gives good results. Generally speaking, sufficient maturity of grapes must be reached to avoid herbaceous and vegetal aromas of Cot to be too present, which can sometimes be hard and bitter.
Clonal selection in France
The eighteen certified Cot clones carry the numbers 42, 46, 180, 279, 353, 419, 592, 593, 594, 595, 596, 597, 598, 1061, 1127, 1128, 1288 and 1289. Two conservatories of approximately 220 clones were planted in the French department of Lot in 1993 and in 2003. An other conservatory of thirty or so clones was planted in the French department of Gironde between 2011 and 2012.
Bibliographic references
- Catalogue des variétés et clones de vigne cultivés en France. Collectif, 2007, Ed. IFV, Le Grau-du-Roi, France.
- Documentary collections of the Centre de Ressources Biologiques de la Vigne de Vassal-Montpellier, INRAE - Montpellier SupAgro, Marseillan, France.
- Dictionnaire encyclopédique des cépages et de leurs synonymes. P. Galet, 2015, Ed. Libre&Solidaire, France.
- Traité général de viticulture, Ampélographie. P. Viala and V. Vermorel, 1901-1909, Ed. Masson, Paris, France.
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
42  Lot  ENTAV  medium  medium  medium  
 1971  Sud-Ouest  medium      
 0.54 ha        distinctive wines of the vine variety
Occasionally slightly irregular clone
46  Lot  ENTAV  high  medium to high  medium to high  
 1971  Sud-Ouest  medium      
 0.96 ha        distinctive wines of the vine variety
180  Gironde  ENTAV  low  medium  medium  medium
 1973  Bordelais, Sud-Ouest  medium    medium  medium
 1.59 ha        distinctive wines of the vine variety
Clone appreciated for its agronomic characteristics.
279  Gironde  ENTAV        
 1973  Gironde        
         Small distribution clone
353  Gironde  ENTAV        
 1975  Gironde        
         Small distribution clone
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
419  Gironde  ENTAV        
 1976  Gironde        
         Small distribution clone
592  Gironde  INRA        
 1978          
         
Small distribution clone
593  Gironde  INRA        
 1978          
         
Small distribution clone
594  Lot  ENTAV  medium  medium  medium to high  medium to high
 1978  Sud-Ouest  medium      medium
 2.38 ha        distinctive wines of the vine variety
Clone appreciated for its agronomic characteristics and quality of wines produced.
595  Lot  ENTAV  medium  medium  medium to high  medium to high
 1978  Sud-Ouest  medium      medium to high
 4.29 ha        distinctive, refined and harmonious wines
Clone appreciated for its agronomic characteristics and quality of wines produced.
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
596  Lot  ENTAV  medium  medium  medium to high  medium to high
 1978  Sud-Ouest  medium      medium
 3.19 ha        distinctive wines of the vine variety
Clone appreciated for its agronomic characteristics and quality of wines produced.
597  Gironde  INRA        
 1978          
         
Small distribution clone
598  Lot  ENTAV  medium  medium  medium to high  medium to high
 1978  Sud-Ouest  medium      medium
 4.66 ha        distinctive wines of the vine variety
Clone appreciated for its agronomic characteristics and quality of wines produced.
1061  Gironde  CA 33 - ENTAV  medium  medium  medium to high  medium to high
 2001  Bordelais  low    medium  medium
         structured wines
Clone appreciated for its agronomic characteristics and quality of wines produced.
1127  Lot  CA 46 - IFV  medium  medium  high  high
 2009  Sud-Ouest  low    medium  high
   medium    high  supple, fruity, balanced and colorful wines
Moderate production level. Wines appreciated for their organoleptic characteristics
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
1128  Lot  CA 46 - IFV  low  low  high  high
 2009  Sud-Ouest  low    medium to low  high
   medium    high  distinctive, structured and colorful wines with a good finish
Moderate production level. Wines appreciated for their organoleptic characteristics
1288  Argentine  Pépinières Mercier - IFV        
 2018          
         
1289  Gironde  Pépinières Mercier - IFV        
 2018