TUNDRA: A NEW LONG STORAGE POTATO CHIPPING

VARIETY WITH CONSISTENTLY HIGH SPECIFIC GRAVITY

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

Palta¹

¹ Department of Horticulture² Agricultural Research Stations

Tundra (W2310-3) Pedigree: Pike x S440

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

Usually higher gravity than Snowden

Better tuber shape and uniformity than Snowden.

Low glycoalkaloid content, much lower than Snowden

Introduction

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

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

Tundra (W2310-3)

Yield of Tundra (W2310-3) vs. Snowden

Yield Potential and Grade: Tundra has medium-high yields

Table 2. Three year average of advanced chipping lines, Hancock, WI (2001, 02, 04)

CultivarTotal Yield US # 1's US # 1's B's Culls HH IBS VD  

  cwt / A cwt / A % cwt / A % SpGv

Tundra 532 482 91 22 28 5 2 3 1.089

Atlantic 509 462 90 23 24 10 9 7 1.085

Snowden 536 492 92 26 18 0 4 2 1.080

050

100150200250300350400450500

Tundra Snowden Tundra Snowden

RRV, 2008 ID, 2010

Culls

>4"

2.5-4"

17/8-2.5"

<1 7/8 "

Tundra (W2310-3) vs. Snowden Yield, RRV and ID

0

100

200

300

400

500

Tundra Snowden Tundra Snowden Tundra Snowden

PA MI Mo

2007 2010

Culls

Large

Mid-Size

Small

Tundra (W2310-3) vs. Snowden Yield, PA, MI, Mo

Specific Gravity (23 trials 2007-10): Nicolet has similar or higher specific gravity compared to

Snowden

Specific Gravity: Tundra’s greatest strength is consistent high specific gravity

1.0651.0701.0751.0801.0851.0901.0951.1001.105

PA ND WI MI Mo PA ID ME NC WI

2007 USPB/SFA Trial

2010, USPB/SFA Trial

Tundra Snowden

1.0651.0701.0751.0801.0851.0901.0951.1001.105

MI MN NE ND-Irr ND-Dry WI

2010, North Central Variety Trial

Tundra Snowden

Chip Quality and Sugar Profile: ON Trials 2007-08

Chip Quality and Sugar Profile: NB Trials 2006-07

Janet McLaughling

Chip Quality and Sugar Profile: ON and NB Trials 2006-08 consistent with storage results

obtained in WI (Bussan)

Snowden Norkotah

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

Tundra

Common Scab: Tundra vs. Snowden

Cooperators: Eugenia Banks Charlie Higgins

Common Scab: Tundra vs. Snowden

Cooperators: Eugenia Banks Charlie Higgins

0

10

20

30

40

Tundra Snowden

mg/

100g

Fres

h w

t.

Tuber Glycoalkaloid Content: Tundra vs. Snowden

Chaconine

Solanine

Tubers of Tundra are smoother and samples from 2008 contained <10 mg/100g

glycoalkaloids, Snowden >30 mg/100g

Tundra (W2310-3)

Tundra Tubers (W2310-3)

Trait Tundra Snowden

Yield ≥ Snowden High

Specific Gravity

Higher than 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 ~ Smoother, 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 Some tolerance Susceptible

Overall Contrast Between Tundra and Snowden (Summary)

University of Wisconsin-MadisonPotato Breeding