Kober 5 BB
Name of vine variety in France (and common name)
Kober 5 BB (5 BB)
Breeder and year of obtention
Sigmund Teleki and Franz Kober, 1896
Genetic origin
This variety is derived from a crossbreeding of Vitis berlandieri and Vitis riparia derived from Euryale Rességuier.
Evolution of areas under rootstock nurseries
1945 1955 1965 1975 1985 1995 2005 2015
Rank 8 5 7 6 6 10 11 11
ha 41 315 283 339 201 57 69 60
Estimated surface area of French vineyards grafted with this rootstock and the main areas of use
9 000 ha. Alsace, Aquitaine, Bourgogne Franche-Comté, Val de Loire, Charentes, Midi-Pyrénées, Rhône-Alpes
Ampelographic description
Identification signs include:
- the tips of the young shoot are half open to closed with a moderate coat of flat-lying hairs and anthocyanin pigmentation on the borders,
-the young leaves are green with slight bronze patches,
- elongated shoot with ribbed contour, a circular or slightly elliptical section, red or striated internodes with a sparse coat of upright hairs on the nodes, 
- bifid tendrils,
- adult leaves are large, soft,wedge-shaped, whole with flat leaf blades, upturned on edges of the teeth; an open U-shaped petiolar sinus, short teeth with convex sides, slight anthocyanin pigmentation of veins and the underside with a sparse coat of upright hairs, ,
- female flowers,
- the berries are very small, rounded and the skin color blue-black,
- vine shoots are brown-gray with darker nodes.
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 139 234 233 236 200 252 236 214 259
Allel 2 147 263 264 246 214 260 246 251 259
Resistance to soil parasites
5 BB displays high tolerance to radicicolae phylloxera and to nematodes Meloidogyne incognita and Meloidogyne hapla. On the other hand, its resistance to the nematodes Meloidogyne arenaria is only moderate and it would appear to be susceptible to Agrobacterium vitis.
Adapt to environment
This rootstock resists up to 35% of total limestone, 20% of active limestone and a CPI of 40. Its resistance to ferric chlorosis is considered medium to good. 5 BB is likewise adapted to humid conditions and particularly to sandy soils.
Interaction with grafts and production objectives
Generally speaking, 5 BB has substantial vigor with grafts and tends to delay maturity. It is sometimes incompatible with certain grafts (for example: Cabernet franc N, Cabernet-Sauvignon N, Colombard B, Sauvignon B) particularly when these varieties are type 2 leafroll virus carriers (GLRaV-2).In the case of serious vine deformation, 5 BB clearly displays the presence of extracellular cords in the wood vessels. In terms of  production, this root stock, which is sometimes used to replace missing plants, tends to foster alternating phenonema while yielding irregular results depending on the year. Products obtained sometimes have low sugar and polyphenol contents.
Aptitudes for plant propagation
5 BB is a good wood producer (80 000 to 100 000 m/ha) and can even be considered as the largest producer among the most frequently used root stocks. Its internodes are long, medium diameter and the growth of lateral shoots is limited. It has good propagation by cuttings and grafting capacity.
Resistance to aerial parasites
Susceptibility to gallicolae phylloxera  is low to medium and it displays a high degree of resistance to downy mildew.
Clonal selection in France
The 12 approved  5 BB clones carry the numbers 76, 77, 78, 79, 114, 127, 129, 149, 191, 259, 753 and 1106.