Félix Navarro¹, Bryan Bowen,² Horia I. Groza², A.J. Bussan¹, Jiming Jiang¹ and Jiwan

Palta¹

¹ Department of Horticulture² Agricultural Research Stations

The goal of the UW Potato Breeding Program is

to develop potato cultivars that are genetically superior and that satisfy or exceed the standard for yield and grade in the fresh market and processing market

University of Wisconsin-MadisonPotato Breeding Outputs

Long Storage Chipping Lines (better than Snowden) Snowden consistently has commercial chip quality

through 6 months from 47ºF storage, and frequently from 7-8 months in storage

Specific Gravity similar or better than Snowden

Snowden consistently has specific gravity ≥ 1.080

High tuber yield, similar or better than

Snowden//Tuber shape?

Disease Resistance Snowden tolerates Verticillium wilt, early blight, has

some late blight tolerance and it is susceptible to common scab.

Glycoalkaloids

Snowden develops high total glycoalkaloids

Long Storage Chipping Breeding

Objectives

Nicolet (W2133-1) Pedigree: Snowden x S440

Yield potential and gravity are similar or better than Snowden

Maintains chip quality at least a month longer than Snowden from 45-48°F storages due to later increase in sugars.

Better tuber shape and uniformity than Snowden.

Low glycoalkaloid content, much lower than Snowden

0

100

200

300

400

500

600

Snowden W2133-1 Snowden W 2133-1

2002 2003

Culls

>16oz

13-16oz

10-13oz

6-10oz

4-6oz

2-4oz

Bsze

Nicolet (W2133-1) and Snowden Yield, and Size Grade, 2002-03, Hancock, ARS

0

100

200

300

400

500

600

Snowden W2133-1 Snowden W2133-1

2006 2007

Unusable

>4"

2.5-4"

17/8-2.5"

<1 7/8 "

Nicolet (W2133-1) and Snowden Yield, and Size Grade, 2006-07, Kimberly, ID

0100200300400500600700

Snow

den

W 2

133-1

Snow

den

W 2

133-1

Snow

den

W 2

133-1

Snow

den

W 2

133-1

Snow

den

W 2

133-1

Snow

den

W 2

133-1

Snow

den

W 2

133-1

Snow

den

W 2

133-1

ALB MI MN 120DAP

MN 90DAP

ND-Irr ND-Dry NE WI

B Size US No. 1 Culls

Nicolet (W2133-1) and Snowden Yield, and Size Grade, 2010, 8 Locations US North Central Region

Nicolet: Consistent Size Grade Profile at 3 Plant Spacings, Hancock 2005

A.J. Bussan

Specific Gravity (22 trials 2005-07: Nicolet has similar or higher specific gravity compared to

Snowden

1.0601.0651.0701.0751.0801.0851.0901.0951.100

ALB M

I

MN

120

DA

P

MN

90D

AP

ND

-Irr

ND

-Dry NE

Ont W

I

2005 Snack Food Assoc. Trial

Nicolet Snowden

Specific Gravity of Nicolet vs. Snowden USPB/SFA 2005

1.040

1.050

1.060

1.070

1.080

1.090

1.100

1.110

2006 2007 2006 2007 2005 2006

ID RRV ME

Nicolet Snowden

Specific Gravity of Nicolet vs. Snowden USPB/SFA 2005-07

1.04

1.05

1.06

1.07

1.08

1.09

1.1

1.11

FL ID ME MI NC PA RRV

2005 North Central Regional Trial

Nicolet Snowden

Specific Gravity of Nicolet vs. Snowden North Central Regional Trial 2005

Nicolet (W2133-1) Pedigree: Snowden x S440

Yield potential and gravity are similar or better than Snowden

Maintains chip quality at least a month longer than Snowden from 45-48°F storages due to later increase in sugars.

Better tuber shape and uniformity than Snowden.

Low glycoalkaloid content, much lower than Snowden

Target ≥60 or>Snowden

V. Currie, U of Guelph

Goal: 0.035

V. Currie, U of Guelph

Nicolet Tubers (W2133-1)

Snowden

Smoother tubers than Snowden Much lower Glycoalkaloids than Snowden

0

10

20

30

40

Nic

olet

Snow

den

Nic

olet

Snow

den

Nic

olet

Snow

den

WI, 2008 WI, 2010 MI, 2010

mg/

100g

Tub

er w

tTuber Glycoalkaloid Content: Nicolet

vs. Snowdensolanine chaconine

Nicolet Snowden Norkotah

Nicolet has strong Vines similar to Snowden and some tolerance to Verticillium wilt

Trait Nicolet Snowden

Yield ≥ Snowden High

Specific Gravity

Similar to Snowden Adequate ~1.080

Chip color Tends to retain good color 1 month later than Snowden

Tends to go off color in Mar-Apr

Glucose and Sucrose

Tends to increase 1 month later than Snowden

Tends to increase in Mar-Apr

Tuber Shape ~ Smooth, easier peeling ~Deep eyes

Glycoalkaloids

Low High

Maturity Full season Full season

Vine Vigor Strong Strong

Verticillium wilt

Tolerant Tolerant

Early Blight Some tolerance Some tolerance

Common scab Susceptible Susceptible

Overall Contrast Between Nicolet and Snowden