b'nique reported by Pavek et al. (1985)PVY. torateblackspotbruisepotential thatdoesinvolvepeeling.Many entries con-Conversely,shatterbruisesresulttinue in the breed-when tubers bump into one anotheringpipeline. oragainstunpaddedtruckbeds,ND081571-2R and stingersorotherconveyingequip- ND081571-3Rare ment,breakingtheskin(oftensiblingsresulting referred to as thumbnail cracking orfromthecrossof other similar term). Blackspot bruiseND4659-5Rx potentialdifferedsignificantlyDakota Ruby; the -acrossthegenotypeswithamean2Risearlierby across genotypes of 3.3 on a scale ofaboutfivedays 1 (none) to 5 (very severe). The rat- and-3Rhasbeen ings ranged from 2.4 for ND1382-2Rmorerecalcitrant to4.4forYukonGold.Advancingintissueculture. selection ND1240-2R rated as a 4.0N D 1 1 3 2 0 7 - 1 R and was the most susceptible of theresultedfromthe NDSUselections.ForcomparativecrossT10-12x purposes, Red Norland rated 3.7 inDakotaRuby;it 2022, but was 2.4 in the 2021 trial.continuestolookA multipurpose potato selection with fresh potential and Similartotheevaluationforverypromisingchip processing ability, ND1241-1Y, is a beautiful round, blackspot bruise, we predict shatterandreleasecon- yellow selection, resulting from the cross of AND071358-1Y x Ivory Crisp.bruisepotentialbybringingpulpsiderationis temperatures to 45F for a week priorplanned for summer 2023. The yel- Verticillium wilt, respectively. to bruising. low-fleshed,brightredselection, ND1232B-2RY, is attractive and fla- AsincerethankyoutoDaveand Tubersforshatteraredroppedvorful.ND1241-1Y,ND1243-1PY,AndyMoquistforhostingthis through a chamber with unpaddedandmanymorealsodemonstrateresearch trial site, to the Northland digger chain link baffles. Tubers arepotential for our northern industryPotatoGrowersAssociation,the incubated at room temperature forandcontinueevaluationbytheMinnesotaAreaIIPotatoResearch 3-5 days to allow shatters to desic- NDSU potato improvement team. andPromotionCouncil,USDA-cate slightly for ease in rating; shat- NIFA,ValleyTissueCulture,and ter number and severity are rated onAdditional trials and evaluations ofmany others, in providing research a scale of 1 (none) to 5 (severe). Theselections with fresh market materi- funding, certified seed for our trials, meanforshatterbruisepotentialals were conducted with Drs. Andyand equipment resources.was 2.0 (very similar to the 1.8 inRob-inson,DarrinHaagensonand 2021) and differed significantly forMunevverDogramaci(bothUSDA- The NDSU potato breeding program clone.TheshatterratingsrangedARS)onskinsetandskinfinish,issupportedbyresearchspecialist from 1.3 for All Blue and Sangre, toDrsJuliePascheandLauraKellyPeppel,graduatestudents 2.9 for ND1455-1R and ND1455-2R.Shannon(UMN)onpowderyscabTannis Anderson and David Ngure, The latter two siblings resulted fromresistance, and Drs. Gary Secor andandundergraduatestudents thecrossofDakotaJewelxJuliePascheoncosmeticdiseasesElizabethKrauseandHunter 95043.11; the Uruguayan selection,including silver scurf and blackdot,Gallagher. 95043.11 has extreme resistance toinadditiontosoftrotand 18 POTATO GROWER MAY/JUNE 2023'