b'French fry quality standard (Table 3). Bannock Russet and Russet Norkotah. andND14110B-3RussfromNDSU.Sugar end formation was evident for A general rating score is given to each ND1412Y-5Russ,ND14110B-1Russ,severalNDSUselections,thoughall plot at grading (Table 1).The score is and are advancing to the 2021 NFPTstemendsexhibitedacceptablecolor basedonvisualassessmentofyield, alongwithND12241YB-2Russwhichwhen evaluated following harvest. Our appearance,thetuberssizeprofile, advanced to Tier 3 in 2021 after seedevaluation of sugar ends is more strin- amongst other traits.Clones differed increase.Theunreplicatedprelimi-gent than that applied by the process- significantly,rangingfrom2.6for nary processing trial included 84 geno-ingindustryinanefforttoidentify ND12162AB-1Russto4.1forRusset types and 12 industry standards pro-trueresistancetothisphysiological Norkotahand4.0forDakotaRusset vidingprocessingandyielddatatodisorder (see footnote 3 on Table 3 for andMN13142.Thesescorescom- guide seed increase and movement for-definition).Following 8-weeks storage binedwithinternalandprocessing wardinthebreedingpipeline.Theat 45F (7.7C), no entrants had French quality attribute scores serve as a guide NorthCentralRegionalTrialhad30frycolorratingsexceeding2.0,and in identifying improved potato geno- freshmarketentriesincludingNDSUonlyRussetNorkotahandShepody types.Some thoughts to note, include selectionsND102663B-3R,ND1029had stem ends with USDA color chart that overall, the site and the trial were 90B-2R,ND113091B-2RY,ND1133ratings over 2.0.Based on our assess- excellent, but yields were not as con- 38C-4R, ND1232B-1RY, ND1232B-2RY,ments, ND113100-1Russ, ND14266AB- sistent as most years (for example, the andND1241-1Y;growersinNDand1Russ,theProprietaryRusset,Russet leastsignificantdifference(LSD)for beyond have expressed interest in fiveBurbank,RussetNorkotahand total yield was 118 cwt. in 2020 (Table of these selections.And an agronomicShepody are the most sensitive to heat 1), when it often ranges from 35 to 50. trialevaluatedtheresponseofand water stress and sugar ends may be Bannock,RussetBurbank,andunmanageable.Sugar ends are a phys- This was our first year at the new site, Umatilla Russet to biological productsiological disorder resulting from sugar soamsurethelateplantingdate,a demonstrating increased soil microbialdepositiononthestemendofthe short breakdown of the pivot early in activity, via more rapid root uptake oftuber rather than starch in the dam- theseason,andthe119daysfrom soil nutrients, following soil and foliaraged cells (low starch and high reduc- planting to harvest played into these applications.ing sugar, Type 1 or classic sugar ends). inconsistencies.Superiordual-pur-Asecondtypeistypifiedbyhaving poserussetsprogressingthroughthe A special thank you to Carl, Mike andbothlowstarchandhighreducing NDSUpotatobreedingprogram CaseyHoversonandallatHoversonsugars on the apical end, and a third, pipelineincludeND8068-5Russ, Farms for hosting our research trials atrare, type where the basal (stem) end ND050032-4Russ,ND060735-4Russ, Larimore, the Northern Plains Potatoaccumulatesreducingsugarwhile ND113100-1Russ,ND12241YB-2Russ, GrowersAssociation,theMinnesotamaintaining high starch levels.Sugar ND1412Y-5Russ,ND14110B-1Russ, AreaIIResearchandPromotionend formation is sporadic and occurs andseveralmorerecentlyselected Council,Simplot,CavendishFarms,in all fall potato production areas; it is lines.MN13142 performed well in our RD Offutt Company, Nilsons and thecaused by heat stress, exacerbated by trial; it is an advancing selection from ForestRiverColony,andtheNIFAwaterstress,duringearlytuberbulk- theUniversityofMinnesota(UMN) SpecialPotatoprogramforresearching.potatobreedingprogramandIam funding,seedpotatoes,andothergratefultoDrs.LauraShannon,Carl resources.Trialentrieswerealsoevaluatedfor Rosen and Sanjay Gupta for allowingspecificgravityandinternalquality us to include it in our 2020 trial. AdditionalthankstoDick(Richard)defects (Table 1).The mean specific NillesandgraduatestudentsFelicitygravitywas1.0918acrossallentries, Other trials at the Larimore site includ- Merritt,EdoardoPoletti,Hashimwith a range of 1.0697 to 1.1065 for ed the National French Fry Processing Andidi,TannisAnderson,andJamesND14252B-4RussandND14265AB- Trial(NFPT)whichincluded50 Bjerke and Team Potato for helping3Russ,respectively.Hollow entries,includingND13213B-1Russ, withplanting,harvest,grading,andheart/browncenterwasnotablein ND1412Y-5Russ,ND14110B-1Russ, evaluation of the 2020 trials.JULY/AUGUST 2021 POTATO GROWER 25'