Agriculture Reference
In-Depth Information
Table 8.1. Examples of seed potato classification schemes in several developed countries.
Micropropagation
Seed grade
USA
Canada
Netherlands
Scotland
France
Sweden
India
Indonesia
Pre-basic (PB)
No field growth
Nuclear or G1 a
Nuclear
Tissue culture
(TC)
PB b TC
Basic (B)0 TC
SS
TC
G0 (plantlets) up to
ten generations
Pre-basic
Field year (FY) 1
Pre-elite FG1 c
PB
PB1
B1
S1
G0
FY2
Elite I FG2
PB
PB2
B2
S2
G1 (Field I)
PB
PB3
B3
S3
G2 (Field II)
PB
PB4
Basic
FY3
Elite II
S
SE1
SE1/B4
SE1
Field III
G0 (tubers)
FY4
Elite III
FG4
SE d
SE2
SE2/B5
SE2
Field IV
FY5
Elite IV
FG5
E e
SE3
SE3/B6
E
Foundation FG6
E1
SE4/B7
Certified
FY6
Certified FG7
A
E2
A1
A
Field V
G1 Foundation 1
FY7
B
E3
A2
G2 Foundation 2
G3 stock seed
G4 extension seed
Maximum field
generations
7
7
9
10
9
7
6
Up to 15
Notes : a G = generation; b PB = pre-basic; c FG = field generation; d SE = Super Elite; e E = Elite.
 
 
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