Limited Generation Certified Seed Potatoes – Field Planting Equivalency Table

A1:J21
AgencyYear 1Year 2Year 3Year 4Year 5Year 6Year 7Year 8Year 9
AlaskaG1G2G3G4G5 G6G7G8...
CaliforniaNG1G2G3G4G5 .........
ColoradoG1G2G3G4G5 G6.........
IdahoNG1G2G3G4G5 G6......
MaineFY1FY2FY3FY4FY5FY6.........
MichiganFY1FY2FY3FY4FY5FY6.........
MinnesotaG1G2G3G4G5 G6C......
MontanaNG1G2G3G4............
NebraskaNG1G2G3G4G5 .........
WyomingNG1G2G3G4G5 .........
NevadaNG1G2G3G4G5 .........
New YorkN1N2N3G1G2G3G4G5 G6
North DakotaNG1G2G3G4G5 .........
OregonNG1G2G3G4G5 .........
UtahN(G1)G2G3G4G5 G6.........
WashingtonNG1G2G3G4G5 .........
WisconsinFY1FY2FY3FY4FY5FY6C......
CanadaPEE1E2E3E4FC......
 G1G2G3G4G5 G6G7......

Prepared by the Certification Section of the Potato Association of America.

The purpose of this table is to express the 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.

The first field planting utilizes laboratory-tested stocks which may be tissue-cultured plantlets, greenhouse-produced minitubers, stem cuttings, or line selections.  Contact agencies for details as to types of stocks planted in their programs.

The term used by agency for seed potatoes for a particular year in the field: C=certified, E=elite, F=foundation, G=generation, N=nuclear, PE=pre-elite.

If lots originate at Cornell-Uihlein Farm, the first three generations (G1-G3) are also designated by a [email protected] to denote source.

FY = Foundation Year (Wisconsin), FY = Field Year (Michigan)

THE RULES AND REGULATIONS FOR COLORADO CERTIFIED SEED POTATOES, AS INCORPORATED HEREIN, HAVE BEEN PROMULGATED BY THE BOARD OF GOVERNORS OF THE CSU SYSTEM PURSUANT TO LEGISLATION ENACTED BY THE COLORADO GENERAL ASSEMBLY, AS INCORPORATED IN SESSION LAWS, 1929, CHAPTER 59, PAGE 188, AND SESSION LAWS, 1933, CHAPTER 25, PAGE 173. SINCE THE USE, CROP, YIELDS, OR QUALITY OF CERTIFIED SEED POTATOES IS BEYOND THE CONTROL OF THE PRODUCER, THE SELLER, THE INSPECTOR, THE COLORADO POTATO GROWERS’ ASSN., INC. OR THE BOARD OF GOVERNORS OF THE CSU SYSTEM, NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY, WHICH EXTENDS BEYOND THE DESCRIPTION ON TAG OR BULK CERTIFICATE IS MADE CONCERNING THE PERFORMANCE OR QUALITY OF THESE SEED POTATOES. BY ACCEPTANCE OF THESE SEED POTATOES, BUYER EXPRESSLY AGREES THAT ITS EXCLUSIVE REMEDY FOR BREACH OF ANY WARRANTY SHALL BE LIMITED IN ALL EVENTS TO A RETURN OF THE PURCHASE PRICE OF THE SEED.

“By law and purpose, the Colorado State University Cooperative Extension Service is dedicated to serve all people on an equal and nondiscriminatory basis.”

Website photos courtesy of Anna Brownell with Zapata Seed

*Potato photos provided by MixPhotoDesign