Lelah: A New Potato Chipping Variety with Excellent Long

Storage Ability

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

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

through 6 months from 47ºF storage, and frequently from 7-8 months in storage (US North: March-April)

Specific Gravity ≥ Snowden

Snowden consistently has specific gravity ≥ 1.080

High tuber yield, ≥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 Chip Breeding Objectives

Lelah (W2717-5) Pedigree: Snowden x S440

Maintains chip quality at least a month longer than Snowden from 45-50°F

Higher and more consistent gravity than Snowden

Better tuber shape and uniformity than Snowden.

Low glycoalkaloid content, much lower than Snowden

Lelah Chip Color (1-9 scale, lower=better)

Wisconsin Breeding Trials 2002-03

Lelah Fry Color and Sugar Profile

Data: V. Currie, A. Sullivan, U. of Guelph

Lelah Chip Color (Agtron) 2006-07Ontario, Canada 50°F Storage Trials

Data: V. Currie, A. Sullivan, U. of Guelph

Lelah Tuber Glucose (mg/g FW) 2006-07

Ontario, Can 50°F Storage Trials

Lelah Tuber Sucrose (mg/g FW) 2006-07

Ontario, Can 50°F Storage Trials

Lelah Chip Color (Agtron) 2007-08

Ontario, Can 50°F Storage Trials

Lelah Tuber Glucose (mg/g FW) 2007-08

Ontario, Can 50°F Storage Trials

Specific Gravity (24 trials): Lelah has specific gravity larger than Snowden

WI Specific Gravity-North Central Lelah (W2717-5) vs.

Snowden

WI Specific Gravity in USPB/SFA-North Lelah (W2717-5) vs. Snowden

How about field yield?

Lelah is one of the prettiest clones we have!

WI Breeding Trials Tuber Yield Lelah vs. Snowden

Hancock, WI Trials

Lelah has moderate, lower tuber yields than Snowden: More similar yield to Snowden in low yielding environments

USPB/SFA Trials

Field Tuber Yield vs. Chip-stock Yield

Tuber yield is moderate Chip-stock yield of Lelah in May is perhaps tuber yield – storage losses What is the chip-stock yield of Snowden and similar varieties by mid April in WI? Most likely = 0

Lelah (W2717-5) Pedigree: Snowden x S440

Maintains chip quality at least a month longer than Snowden from 45-50°F.

Specific gravity is similar to Snowden in average but more consistent (less variable)

Better tuber shape and uniformity than Snowden.

Field yield lower than Snowden, but it is a choice as a chip-stock after 7-9 months in storage, when Snowden yield = $0

Lelah: A New Potato Chipping Variety with Excellent Long

Storage Ability

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