Certified Seed Potatoes Field Planting Equivalency Table

The purpose of this table is to express equivalency of terms used by various certification agencies for seed potatoes harvested from a series of successive field plantings. For specific criteria relating to disease tolerances and other requirements, the reader is referred to the certification regulations of the agency in question.

Terms used by agency for seed potatoes for a particular year in a field:

C=Certified, E=Elite, F=Foundation, G=Generation, N=Nuclear, PE=Pre-elite.

AgencyYEAR IN THE FIELD
1(pu-1)2345678
AlaskaG1G2G3G4G5G6G7G8
CaliforniaNG1G2G3G4G5--
ColoradoG1G2G3G4G5G6--
IdahoNG1G2G3G4G5G6-
MaineN1N2N3N4G1G2G3G4
MichiganNG1G2G3G4G5--
MinnesotaNG1G2G3G4G5C-
MontanaNG1G2G3G4---
NebraskaNG1G2G3G4G5--
New York(pu2)N1N2G1G2G3G4G5G6
North DakotaNG1G2G3G4G5C-
OregonNG1G2G3G4G5--
UtahN(G1)G2G3G4G5G6--
WashingtonNG1G2G3G4G5--
Wisconsin(pu3)E1E2G1G2G3G4C-
CanadaPE
(G1)
E1
(G2)
E2
(G3)
E3
(G4)
E4
(G5)
F
(G5)
C
(G6)
-
Revision Date: Jan. 2002

1- The first field planting utilizes laboratory-tested stocks which may be tissue-cultured plantlets, greenhouse-produced mini tubers, stem cuttings, or line selections. Contact agencies for details as to types of stocks planted in their programs.
2- If lots originate at Cornell-Uihlein Farm, the first three generations (G1-G3) are also designated by a AU @ to denote source.
3- Lots NOT originating at the UW Lelah Starks Elite Foundation Seed Potato Farm are designated Gn where n=years in the field.

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