1. New Fresh Market and Processing Potato Clones in the
Wisconsin Potato Breeding Program Pipeline
Félix Navarro, Bryan Bowen, Mary Lemere, and Jiwan Palta
Yield Size Grade and Gravity: Process Russets
Introduction Fresh Market Russets
A goal of the UW Potato Breeding Program is to develop genetically
W6234-4rus W8152-1rus
superior russet potato cultivars that satisfy or exceed the standard for (Moderately Low Acrylamide) (Extremely Low Acrylamyde) W8772-1rus (W2253-2rus x CO82142-4rus)
yield and grade for the fresh market and processing markets.  Moderate yield. Medium early. As early as Russet Norkotah
 Nice type
Each year parental lines with desired traits are crossed and progenies are  Common Scab Resistant
evaluated for fresh market and processing traits, emphasizing early
selection evaluation in Central WI and other environments Tuber
Spec
Free
Location Clone Pref Internal
Grav
1-5 Defects
Objectives: HARS-Y3 W8772-1rus 1.064 95.6
2009 RBurbank 1.078 84.7
• Development of alternatives for the fresh market to varieties like Goldrush, HARS-Y4 W8772-1rus 1.9 1.063 96.4
2010 RNorkotah 2.0 1.066 96.3
Russet Norkotah or Silverton. HARS-Y5 W8772-1rus 1.8 1.056 94.1
• Developing processing russet varieties with more consistent agronomic 2011 RNorkotah 1.9 1.060 91.7
HARS-SPP W8772-1rus 2.0 1.071 92.1
performance compared to Russet Burbank while closely retaining Burbanks’ 2012 RNorkotah Sel8 2.0 1.063 80.8
French fry attributes.
Breeding and Selection Methods W9133-1rus (ND4093-4rus x CO82142-4rus)
 Yield similar or higher than Russet Norkotah. Medium late.
Each year:  Nice tuber external type. Very low internal defects
• Parental lines with desired traits are crossed and progenies are  Tolerant to common scab. Susceptible to VW and early blight.
evaluated for fresh market and processing traits.
• Early Selection: in field year 1-2 clones are evaluated for fresh market
Fresh Market Russets
Tuber Internal
or processing traits at Rhinelander ARS. Location Clones Pref SG
(1-5)
Defects
Free %
• Year 3-5: Clones are more intensively evaluated for agronomic, disease, HARS-Y3
2010
W9133-1rus
RNorkotah
1.059
1.060
fresh market and processing potential at various locations: Hancock W8516-1rus (Silverton x Ranger Rus)
HARS-Y4
2011
W9133-1rus
RNorkotah
1.6
2.0
1.068
1.067
94.4
90.9
ARS, Rhinelander ARS and out of WI. HARS-Y5 W9133-1rus 1.8 1.059 95.9
 High Yield. Medium early; maybe as early as Russet Norkotah. 2012 RNorkotah 2.2 1.063 92.8
• Year 6+: Evaluation in WI (HARS, RARS, Antigo) regional, national trials HARS-SPP W9133-1rus 1.0 1.061 97.0
 Nice type 2012 RNorkotah Sel8 2.0 1.06 81.0
and some locations in Canada (MB, ON, NB): Agronomic performance HARS- W9133-1rus 1.8 1.061 93.3
 Common Scab Resistant WVT 2012 RNorkotah 2.3 1.064 83.3
and processing traits. Antigo
WVT 2012
W9133-1rus
RNorkotah
1.8
1.5
1.067
1.072
97.2
79.0
Alliston, W9133-1rus
Canada Rburbank
Results
Tuber Free
Spec
Location Clone Pref 1- Internal
Grav
HARS-Y4
5
W8516-1rus 2.3 1.072
Defects
95.7 W9433-1rus (Calwhite x A96023-6)
2.4 1.073
Russet Processing Clones
2009
HARS-Y5
RNorkotah
W8516-1rus 1.8 1.058
83.1
94.5 Nice looking light russet. Less internal defects than Russet Norkotah
2011
HARS-SPP
RNorkotah 1.9 1.060
W8516-1rus 1.5 1.072
92.1
90.4
Tolerance to Verticillium wilt and Early Blight. Maturity: Medium Late
W6234-4rus W8152-1rus 2012 RNorkotah Sel81.7 1.063 80.8
(Umatilla Russet x A9014-2rus) (A93004-3RU x CO94035-15RU)
Location Clone Tuber Spec Free
Pref Grav Internal
1-5 Defects
HARS-Y3 W9433-1rus 1.074 82.0
W8722-1rus (A9014-2rus x W2683-2rus) 2009
HARS-Y4
RBurbank
W9433-1rus 2.2
1.073
1.069
84.2
Yield similar to Russet Norkotah. Medium late maturity. 2010
HARS-Y5
RNorkotah
W9433-1rus
2.0
1.8
1.066
1.066 91.1
Nice tuber shape and Common scab resistance 2011
HARS-SPP
RNorkotah
W9433-1rus
1.9
1.8
1.060
1.077
91.7
92.7
Location Clone Tuber Spec Free
2012 RNorkotah Sel8 1.7 1.063 81.0
Pref Grav Internal
1-5 Defects
HARS-Y3 W8722-1rus 1.076 91.3
2009 RBurbank 1.078 84.7
HARS-Y4 W8722-1rus 2.8 1.064 93.3
1mo 1mo 2010
48°F 48°F HARS-SPP
2012
RNorkotah
W8722-1rus
RNorkotah Sel8
2.0
2.0
2.0
1.066
1.067
1.063
96.3
93.8
80.8
SpudPro Seed Availability (Foundation Seed Farm)
HARS-WVT W8722-1rus 1.5 1.069 93.3
2011 RNorkotah 2.0 1.069 93.1
Variety 2012 2013 2014 2015 2016 2017 2018 2019 2020
HARS-WVT W8722-1rus 2.2 1.070 96.7 E2 SG SG/Com
2012 RNorkotah 2.3 1.064 83.3 W6234-4rus
3mo E1 E2 SG SG/Com
3mo Antigo WVT W8722-1rus 2.5 1.073 78.5
2012 RNorkotah 2.8 1.077 95.7 W8152-1rus MT E1 E2 SG SG/Com
48°F 48°F
29 W8516-1rus VC VC/TC
W8722-1rus VC VC/TC
W6234-4rus Russet Burbank W8152-1rus Russet Burbank W9133-1rus VC VC/TC
W9433-1rus VC VC/TC
Tuber characteristics of W6234-4rus and W8152-1rus and comparison of
Note: MT = mini-tuber production, E1, E2, SG foundation seed categories, SpudPro on-farm test, SG/Com = certified seed
fry products to Russet Burbank processed at 1 and 3 months after harvest.