b'Chip And Fry Processing Evaluations AmongAdvanced Breeding Clones In Storage. (2019 Crop)by Darrin Haagenson, USDA/ARSTheobjectiveofthisstudywasto ty of numbered breeding lines were ly after batch frying for 3.5 minutesidentifyadvancedpublicpotato comparedagainstnamedcheck at 375F.According to the photo-breeding lines that maintain quality varietiesthroughoutstorage. volt manufacturer: USDA 1 44%,chipandfryprocessingafterpro- Sucrose and glucose concentrations USDA 2 = 35 to 44%, USDA 3 = 26longedstorageatcontrastingstor- weredeterminedatallsampling to 35%, USDA 4 26% photovoltage temperature.Considerable cost datesusingaYSI2900D reflectance. savingscouldbeachievedat Biochemistry Analyzer.reduced temperature storage ( 45F) Chip Clone Evaluationsthrough decreased shrinkage, lower Forchipprocessingclones,chips HunterLabscoresat3,6,and7incidenceofdiseasepressure,and (thicknessof20slices/inchor monthsofstorageat45and42F,decreasedneedforsproutinhibi- roughly 0.05 inches/slice) were fried andclass(AorB)rankingafter7tion. However, prolonged cold stor- in canola oil (365F) for 90 seconds monthsofstorageispresentedinage at temperature below 45F often using a pilot scale continuous chip Table1.Hunterscoresandchipresultsinoffcolorproductforma- line.Chip color ratings were deter- qualitywasgenerallypoorat3tion resulting from enhanced sugar mined using a Hunterlab color score monthsofstorageat42F.accumulation, and cold sweetening (HunterLabD25withDP-9000 However, the 30 clones included inremains a challenge to growers and processor)andtheSnackFood Table1providedacceptablechipprocessors. Association five point scale (1 light, quality at 7 months of 45F storage.5 dark).Evaluatingchipqualitywasdeter-Processingcloneswereobtained mined by a combined assessment offromeightpublicbreedingpro- Atsevenmonthsofstorage,chip chip appearance and sugar concen-grams including 42 chip clones and cloneswereclassifiedaccordingto trations (data not shown). In total,38 russet fry clones.Field trials were methodsofSowokinosandGlynn there were 20 Class A clones in 2019planted on 31 May 2019 and grown (2000) where: that provided excellent chip qualityunderirrigationatLarimore,ND following7monthsofstorageatwith agronomic practices followingClass A: clones provide good qual- 42F.Highlighting these 20 clones,NorthDakotaproductionguide- itychipsprocesseddirectlyfrom fiveweredevelopedinNorthlines.Plotswereflailedon7 42F storage, 7 months. Dakota(ND102631AB-1,October and harvested on 9 October ND113509C-2,ND113533AB-2,2019.FollowingsuberizationforClass B: clones provide good chip ND122C-1, ND1338C-3), four eachtwo weeks at 95% RH, 50F, tubers quality from 45F, but not from 42F fromMaine(MSAFB605-4,were placed into controlled storage storage, 7 months. MSAFB609-12,MSAFB635-15,coolerswheretemperaturewas MSAFB635-3)andMichiganrampeddown(0.4Fday-1)tothe Sowokinos, J. R. and M. Glynn 2000. (Mackinaw, MSV030-4, MSW075-2,respective storage temperature treat- Marketing potential of advanced potato MSZ222-19), two clones from Texasment(48,45,42,and40F). breeding clones.Valley Potato Grower. (AORTX9037-5w/y,NDTX12135-Postharvestsampleprocessing 65(110):6-8. 1w), with one Class A clone origi-occurred at 18 November and at 3, 6 natingfromColorado(CO10076-and 7 months of storage. For russet clones, fry color of planks 4w).An additional 10 clones were(5/16x7/8)wereassessedusing rated as Class B as these clones pro-Sugar profiles and processing quali- photovolt % reflectance immediate- videdacceptablechipqualityfol-20 POTATO GROWER SEPTEMBER/OCTOBER 2020'