. . .
 
Burley
Disease resistances
Agronomic traits
Variety**
Date intro. in crop

Black root rot (1)
PVYn (2)
TMV (3)
Blue mold (4)
Flowering date (5)
Yield potential (6)
Quality of product after curing (6)
BB16
1980
S
S
R
R
10
7
6

BB16A
1985
R
S
R
S
7
7
8
ITB4490
1992
R
R
S
S
9
7
7
ITB2104
1993
R
R
S
S
10
9
7
ITB2204
1993
R
S
R
S
5
10
6
ITB2601
1994
R
R
S
S
6
9
7
ITB2604
1996
R
R
S
S
6
10
8
TN90*
1996
R
R
R
S
5
9
5
ITB218
1997
R
R
S
S
6
7
8
ITB501
1998
R
R
S
S
7
9
10
ITB502
1999
R
R
S
S
6
8
10
ITB503
1999
R
R
S
S
7
9
9
ITB221
2000
R
R
S
S
6
8
9
ITB219
2001
R
R
S
S
5
8
8
ITB529
2001
R
R
R
R
10
9
8
*
Burley variety, US origin, grown in France, presented here as reference.
**
Varieties highlighted in brown are male-sterile.
(1)
Resistance confers a quasi immunity to the fungus Chalara elegans (Thielaviopsis basicola), agent of the black root rot.
(2)
Resistance to vein necrosis caused by the PVYn strains (Necrotic Virus Y of Potato) most widespread on tobacco in France.
(3)
Resistance to TMV (Tobacco Mosaic Virus) conferred by the N gene.
(4)
Resistance to tobacco blue mold (Peronospora tabacina), expressed at beginning of flowering.
(5)
Varieties are classified on a scale from 1 to 10, 10 being the earliest flowering. This criterion is indicative for the control of growing (growth of the plants, date of topping).
(6)
Varieties are classified on a scale from 1 to 10, 10 being the best potential. Quality criteria are related to the physical aspect (colour, homogeneity, leaf body) and chemical (lower tar potential, chemical balance corresponding to the standard specifications).
 

 

 
ITB 219