b'Andys Advice:Storage Trial Results For The North Dakota Fresh Market Potato TrialsBy Andy Robinson, Extension Potato Agronomist, NDSU/UMN, Dr. Darrin Haagenson, USDAPlant Pathologist, Dr. Asunta Susie Thompson, NDSUPotato Breedersetup to simulate storage in a com- clonesformostinmostqualities mercial potato bin. All samples wereevaluated for both the red and yel-weighed prior to storage. Followinglowtrials.Comparingthered-aperiodforwoundhealing,theskinned clones tested in 2019-2021, temperature was slowly reduced toSangre, W8890-1R, and Roko (Table 42Fwith95%relativehumidity,1) were the best storage clones. They andanairflowof1.5cfm/cwt.Aconsistentlyhadfewerpressure pressure plate was used to providebruises, average smaller bruise area, pressurebyincrementallyincreas- and less weight loss following stor-ing the pressure until it reached 2.1age.Fortheyellow-skinnedclone lb/inch2tosimulatepilepressure.trial,onlydatafrom2020-2021is Tubers were harvested in Septemberpresented(Table2)becausethe or early October and placed in the2019harvestwasinterruptedbya pressure bruise chamber within onesnowstorm.Oftheyellowstested, dayofharvesting.Potatotubersthedataindicatemorevariability. Over the past three years, we haveremainedinthepressurebruiseNDA081451,Obama,CO05037-3, been evaluating newer cultivars andchamberforaboutfivetosixCO10064-1,Actrice,andLanorma advancing selections in two differ- months,untilFebruaryorearlyhad fewer pressure bruises, smaller enttrials,onefocusedonred- March.Afterremovingthetubers,average bruise area, and less weight skinned potatoes and the other onthey were weighed, and the numberloss following storage.yellow-skinnedpotatoes.Theyieldandsizeofpressurebruiseswere results for these trials can be foundmeasured.The data presented in Table 1 and 2 atz.umn.edu/Potato2019,z.umn.wereanalyzedstatistically.These edu/Potato2020,orz.umn.edu/Standardcultivarswereusedasanalysesallowthereadertoascer-Potato2021. Alternatively, search forchecksservingasbenchmarksfortain,atapredeterminedlevelof North Dakota Fresh Market Potatootherentries,includingRedconfidence,ifthedifferences Cultivar/SelectionTrialResults.AsNorland,DarkRedNorland,Redobserved among cultivars/selections partofthesetrials,sub-samplesofPontiac,andSangre.Fortheyel- are reliable, or if they might be due 20 tubers harvested were placed inlows,industrystandardsincludedto error inherent in the experimen-small mesh bags and placed into aActrice, Agata, Musica, and Alegria,tal process. post-harvest pressure bruise storageservingasbenchmarks,depending testbinattheUSDA-ARSPotatoon which variety you have experi- TheLSD(leastsignificantdiffer-Worksite in East Grand Forks, Northence with on your farm operation. ence)valuesbeneaththecolumns Dakota.applyonlytothenumbersinthe Differenceswerefoundbetweencolumn in which they appear. If the The pressure bruise chambers were 16 POTATO GROWER MAY/JUNE 2022'