b'Developing Chip Processing Potato Cultivars2019 Hoople Chip Trial Summaryby Dr. Asunta (Susie) Thompson, NDSU Potato BreederPotato is an important horticultural thePreliminarycropinNorthDakota,Minnesota Chip Trial, and theandtheNorthernPlains.About NationalChip12% of potatoes produced in North BreedersTrialsDakotaandMinnesotaare (NCPT)wereprocessedintochips.TheNDSU included at the site.potatobreedingprojectaspartof Additionally,wethepotatoimprovementteamat collaborate with Dr.North Dakota State University seeks DarrinHaag-enson,to develop improved chipping pota- USDA-ARSPotatoto cultivars adapted to our region, Worksite(Eastwith high yield potential, biotic and GrandForks,abioticstressresistances,andwith Minnesota)insuperior quality.An area of success plantingandhar- Chip samples from 8 weeks storage at 3.3C (38oF). Thelight colored sample is ND13228CAB-3for our program has been breeding, vesting of the SNAC Grimmeharvester.Plotswere20selection, development, and release trial at this site.The unreplicated feetlong,witha12-inchwith-inof chipping potato cultivars, includ- PreliminaryChipTrialhad19 row spacing, and 38 inches betweening Norchip, NorValley, and Dakota advancingselectionscomparedto rows; the field design was a random-Pearl.We continue to place empha- 11standardchipcultivars.This izedcompleteblockdesignwithsisonincorporationofmultiple trial gives our program an opportu- fourreplicates.Cultivarspecificresistancestodiseasesandpests, nity to evaluate agronomic and chip managementpracticestypicalofincludingColoradopotatobeetle, qualityattributesofcloneswith non-irrigatedchipprocessingpro-aphids and viruses, late blight, silver limited seed quantities.The NCPT duction fields in the northern Redscurf, pink rot, Pythium leak, and to had 120 entries in Tier 1 (unrepli- RiverValleywereutilized.Theabiotic stresses such as temperature cated), and 27 in Tier 2 (replicated); growingseasonwasextremelydryand cold sweetening resistance, pro- six Tier 1 selections and one Tier 2 asin2018,withrainfallpredomi-vidingopportunitiesforimproved selectionwerefromNDSU.The nantlyoccurringafterAugust22.economicandenvironmentalsus- 2019ChipProcessingtrialhad22 Daystoharvestwere132.tainability.Aspartofourevalua- entries, 13 advancing selections and Agronomic characteristics are sum-tionefforts,chipprocessingtrials 9industrychipprocessingstan- marized in Table 1, yield and gradearegrownnearHoople,North dards;resultsaresummarizedin inTable2,andchipprocessingDakota, and as in past years, Lloyd, Tables 1-3.An irrigated Preliminary qualitytraitsaresummarizedinSteve, and Jamie Oberg hosted the Chip Trial was planted at Hoverson Table 3.2019 trials.We are extremely grate- Farms; however, we were unable toful to them for hosting the chip tri- harvest before receiving significant Percentagestanddifferedsignifi-als and also for providing the loca- snow and freezing temperatures. cantly for entrants, with a range oftion for the final stop of the annual 80%to96%,andameanof89%NorthernPlainsPotatoGrowers The 2019 chip processing trial was (Table 1).Atlantic and ND1446CB-Association Field Day in August.planted on May 28, using an assist- 8hadreducedstands.Stemsperfeedplanter,andharvestedon plant differed significantly, rangingIn 2019, the Chip Processing Trial, October8usingasingle-row10 POTATO GROWER MAY/JUNE 2020'