Bia B
Name of vine variety in France
Bia
Origin
Bia B is an old vine variety from the Isère valley and the Rhône region.
Synonymy
In France, this variety can officially be called "Bia blanc B" for plant propagating material.
Regulations
In France, Bia B is officially listed in the "Catalogue of vine varieties" since September 2011.
Use
Wine grape variety.
Evolution of area under vines in France
1958 1968 1979 2016
ha 21 10 0.1 0
Description
Identification signs include:
- the tip of the young shoots have a dense cover of flat-lying hairs,
- the young leaves are green with slightly bronze patches,
- shoots have ribbed surfaces,
- orbicular-shaped adult leaves, 5 or 7 lobes with fairly deep lateral sinuses, an open U-shaped petiolar sinus; small to moderate size teeth with straight sides; an absence of anthocyanin coloration of veins, a flat leaf blade or slightly upturned, finely bubbled and the underside with a low to moderate coat of flat-lying and upright hairs,
- slightly elliptical-shaped berries.
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 135 225 257 186 188 252 238 216 239
Allel 2 149 236 260 191 194 260 262 257 261
Phenology
Bud burst: 5 days after Chasselas. Grape maturity: period III, 3 and 1/2 weeks after Chasselas.
Suitability for cultivation and agronomic production
Bia B is moderately vigorous and is generally long pruned and the shoots grow semi-erect.
Sensitivity to diseases and pests
Bia B is somewhat susceptible to downy mildew and grey rot.
Technological potential
Bia B grape clusters and berries are moderate size. This grape variety and its very good balance between sugar potential and acidty, can be used to produce pleasant, elegant and slightly aromatic wines.
Clonal selection in France
There are no existing approved clones for this vine variety.
Bibliographic references
(drafting underway)