Accumulator: A New Short Storage Potato Chipping Variety with Exceptional Yield Potential

F.M. Navarro1, B.D. Bowen2, H.I. Groza2, A.J. Bussan1, J. Jiang1 and J.P. Palta1

¹ Department of Horticulture² Agricultural Research Stations

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

Short Storage Chipping Lines (An option to replace

Atlantic) Atlantic (Webb, 1978) has been an excellent off-

the field variety due to its high yield and specific gravity and general adaptation. Main defects are internal defects i.e. internal heat necrosis and hollow heart and black spot bruise and common scab susceptibility. No able to store as chip-stock

Short Storage Chipping Breeding

Objectives

Reliable Short Storage

High tuber yield ≥ Atlantic

High adaptation across potato regions

Consistent specific gravity similar to Atlantic

or in the acceptable range.

Size grade

Reduced Internal Defects (i.e. HH, IHN-

South)

Disease Resistance Atlantic has some tolerates Verticillium

wilt, early blight, and it is moderately susceptible to common scab.

Challenges in Finding a Short Storage variety to replace Atlantic

Accumulator (W2324-1) Pedigree: Snowden x S438

Yield potential > Atlantic and gravity is between Atlantic and Snowden

Produces good chip quality off the field and in short storage (0-3 months)

Low glycoalkaloid content, much lower than Snowden

Accumulator (W2324-1) Pedigree: Snowden x S438

Yield potential: Accumulator has scored record yields in experiments and on-farm trials in WI and Southern states, usually ≥20% over Atlantic

Accumulator Atlantic

Yield (cwt/a) and Grade Accumulator (W2324-1) vs.

Atlantic WI Breeding Trials (1999, 2000 )

Hollow Heart % Accumulator (W2324-1) vs. Atlantic and Snowden

US#1 Yield (cwt/a) Accumulator (W2324-1) vs.

Atlantic WI State Trials (2001-03 )

2006 Tuber Bulking Rate Accumulator (W2324-1) vs.

Snowden 2006 Spacing Trials: Tuber weight (oz)

TraitW2324-1

Snowden

Stems/pt 3.4 4.2

Tubers/pt >1cm Jul17

15.6 9.7

• High yield of Accumulator can be explained by the large number of tubers per plant • This larger number of tubers just like Snowden can use additional time for bulking late in the season

WI Specific Gravity: Accumulator (W2324-1) vs.

Atlantic (8 years)

Specific Gravity (8 WI trials): Atlantic>Accumulator> Snowden

Tuber Yield in the US-Northern States

North Central 2006 Yield (cwt/a) Accumulator (W2324-1) vs.

Atlantic

North Central 2007 Yield (cwt/a) Accumulator (W2324-1) vs.

Snowden

USPB/SFA Trial: Yield (cwt/a) Accumulator (W2324-1) vs.

Atlantic and SnowdenUS-North

Accumulator: Ability of chips to have good color after short storage better than Atlantic

Is Accumulator (W2324-1) an Option for the US South?

• Yield• Specific Gravity• Internal Heat Necrosis• Chip color

USPB/SFA Trial: Yield (cwt/a) Accumulator (W2324-1) vs.

SnowdenUS-South

USPB/SFA Trial: Yield (cwt/a) Accumulator (W2324-1) vs.

SnowdenUS-South

Accumulator tolerates IHN much better than Atlantic but can be affected under

extreme heat stress (i.e. NC 2010)

2011

Fry Color off the Field (1-5 Scale, 1 best): Accumulator vs. Atlantic

Fry Color off the Field (Agtron values, larger is better): Accumulator vs.

Atlantic

SFA Missouri

Limitations of Accumulator:

• Deep eyes• More susceptible to common scab• Manage (Avoid) risk High reward

Accumulator

Atlantic

Trait Accumulator (W2324-1)

Yield Higher than Atlantic (≥20%)

Specific Gravity Atlantic>Accumulator>Snowden

Tuber Internal Quality

HH: very low to 0%, IHN: Much better

Tuber Development Continues to bulk after Atlantic is done bulking

Short Storage Ability Accumulator stored for three months may fey similar to Atlantic off the field

Vine Vigor Strong

Verticillium wilt Tolerant

Early Blight Some tolerance

Overall Benefits of Accumulator vs Atlantic

Accumulator: A New Short Storage Potato Chipping Variety with Exceptional Yield Potential

F.M. Navarro1, B.D. Bowen2, H.I. Groza2, A.J. Bussan1, J. Jiang1 and J.P. Palta1

¹ Department of Horticulture² Agricultural Research Stations