The document describes the University of Wisconsin potato breeding program and a new potato variety called Nicolet. Nicolet was bred from Snowden and S440 to have longer storage life for chipping while maintaining Snowden's yield and gravity. Test results showed Nicolet had similar or better yield and gravity than Snowden, maintained chip quality longer in storage, and had lower glycoalkaloid levels.

1. Félix Navarro ¹, Bryan Bowen,² Horia I. Groza²,
A.J. Bussan¹, Jiming Jiang ¹ and Jiwan Palta ¹
¹ Department of Horticulture
² Agricultural Research Stations

2. 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

3. University of Wisconsin-Madison
Potato Breeding Outputs

4. Long Storage Chipping
Breeding Objectives
 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

5. 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

8. Nicolet (W2133-1) and Snowden Yield, and Size Grade,
2002-03, Hancock, ARS
600
500
Culls
400 >16oz
13-16oz
300
10-13oz
200
6-10oz
100 4-6oz
2-4oz
0
Bsze
Snowden W2133-1 Snowden W 2133-1
2002 2003

9. Nicolet (W2133-1) and Snowden Yield, and Size Grade,
2006-07, Kimberly, ID
600
500
400
Unusable
300 >4"
200 2.5-4"
17/8-2.5"
100
<1 7/8 "
0
Snowden W2133-1 Snowden W2133-1
2006 2007

10. Nicolet (W2133-1) and Snowden Yield, and Size Grade, 2010,
8 Locations US North Central Region
B Size US No. 1 Culls
700
600
500
400
300
200
100
0
-1
-1
-1
-1
-1
-1
-1
-1
w
w
w
w
w
w
w
w
W
W
W
W
W
W
W
W
o
o
o
o
o
o
o
o
d
n
d
n
d
n
d
n
d
n
d
n
d
n
d
n
e
e
e
e
e
e
e
e
S
S
S
S
S
S
S
S
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
ALB MI MN MN ND-Irr ND-Dry NE WI
120DAP 90DAP

12. Nicolet: Consistent Size Grade Profile at 3 Plant
Spacings, Hancock 2005
A.J. Bussan

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

15. Specific Gravity of Nicolet vs. Snowden
USPB/SFA 2005
Nicolet Snowden
1.100
1.095
1.090
1.085
1.080
1.075
1.070
1.065
1.060
W
M
N
r
E
-I
I
I
-D
O
y
A
B
n
r
L
t
N
D
N
D
M
N
D
A
P
0
9
M
N
D
A
P
0
2
1
2005 Snack Food Assoc. Trial

16. Specific Gravity of Nicolet vs. Snowden
USPB/SFA 2005-07
Nicolet Snowden
1.110
1.100
1.090
1.080
1.070
1.060
1.050
1.040
2006 2007 2006 2007 2005 2006
ID RRV ME

17. Specific Gravity of Nicolet vs. Snowden
North Central Regional Trial 2005
Nicolet Snowden
1.11
1.1
1.09
1.08
1.07
1.06
1.05
1.04
FL ID ME MI NC PA RRV
2005 North Central Regional Trial

18. 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

19. Target ≥60
or
>Snowden
V. Currie, U of Guelph

20. Goal: 0.035

23. V. Currie, U of Guelph

25. Nicolet Tubers (W2133-1)
Smoother tubers than Snowden Much lower
Glycoalkaloids
than Snowden
Snowden

26. Tuber Glycoalkaloid Content: Nicolet
vs. Snowden
40 solanine chaconine
30
20
10
0
m
w
b
u
0
1
e
T
g
/
r
t
N
N
N
o
o
o
e
e
e
c
c
c
t
t
t
l
i
l
i
l
i
w
w
w
o
o
o
d
n
d
n
d
n
e
e
e
S
S
S
WI, 2008 WI, 2010 MI, 2010

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

28. Overall Contrast Between Nicolet and Snowden
Trait Nicolet Snowden
Yield ≥ Snowden High
Specific Similar to Snowden Adequate ~1.080
Gravity
Chip color Tends to retain good color 1 Tends to go off color in
month later than Snowden Mar-Apr
Glucose and Tends to increase 1 month Tends to increase in
Sucrose later than Snowden Mar-Apr
Tuber Shape ~ Smooth, easier peeling ~Deep eyes
Glycoalkaloids Low High
Maturity Full season Full season
Vine Vigor Strong Strong
Verticillium Tolerant Tolerant
wilt
Early Blight Some tolerance Some tolerance
Common scab Susceptible Susceptible