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An apple rootstock overexpressing a peach CBF gene alters growth and flowering in the scion but does not impact cold hardiness or dormancy

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Horticulture Research 2016年第1期3卷 287-295页

作者： Timothy S Artlip Michael E Wisniewski Rajeev Arora john L norelli USDA-ARS Appalachian Fruit Research StationKearneysvilleWVUSA Department of Horticulture Iowa State UniversityAmesIAUSA

The C-repeat binding factor(CBF)transcription factor is involved in responses to low temperature and water deficit in many plant *** of CBF genes leads to enhanced freezing tolerance and growth inhibition in many *** overexpression of a peach CBF(PpCBF1)gene in a transgenic line of own-rooted apple(Malus×domestica)M.26 rootstock(T166)trees was previously reported to have additional effects on the onset of dormancy and time of spring *** the current study,the commercial apple cultivar‘Royal Gala’(RG)was grafted onto either non-transgenic M.26 rootstocks(RG/M.26)or transgenic M.26(T166)rootstocks(RG/T166)and field grown for 3 *** PpCBF1 transcript was detected in the phloem or cambium of RG scions grafted on T166 rootstocks indicating that no graft transmission of transgene mRNA had *** contrast to own-rooted T166 trees,no impact of PpCBF1 overexpression in T166 rootstocks was observed on the onset of dormancy,budbreak or non-acclimated leaf-cold hardiness in RG/T166 ***,however,as measured by stem caliper,current-year shoot extension and overall height,was reduced in RG/T166 trees compared with RG/M.26 *** flowering was evident in both RG/T166 and RG/M.26 trees in the second season,the number of trees in flower,the number of shoots bearing flowers,and the number of flower clusters per shoot was significantly higher in RG/M.26 trees than RG/T166 trees in both the second and third year after *** levels of RGL(DELLA)gene expression were observed in RG/T166 trees and T166 trees,which may play a role in the reduced growth observed in these tree types.A model is presented indicating how CBF overexpression in a rootstock might influence juvenility and flower abundance in a grafted scion.

关键词： impact CBF grafted

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Fire blight QTL analysis in a multi-family apple population identifies a reduced-susceptibility allele in ‘Honeycrisp’

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Horticulture Research 2021年第1期8卷 355-367页

作者： Sarah A.Kostick Soon Li Teh john L.norelli Stijn Vanderzande Cameron Peace Kate M.Evans Tree Fruit Research and Extension Center Department of HorticultureWashington State UniversityWenatcheeWA 98801USA United States Department of Agriculture Agricultural Research ServiceAppalachian Fruit Research LaboratoryKearneysvilleWV 25430USA Department of Horticulture Washington State UniversityPullmanWA 99164USA

Breeding apple cultivars with resistance offers a potential solution to fire blight,a damaging bacterial disease caused by Erwinia *** resistance alleles at quantitative trait loci(QTLs)were previously characterized in diverse Malus germplasm with poor fruit quality,which reduces breeding *** study utilized a pedigree-based QTL analysis approach to elucidate the genetic basis of resistance/susceptibility to fire blight from multiple genetic sources in germplasm relevant to *** breeding ***-seven important breeding parents(IBPs)were represented by 314 offspring from 32 full-sib families,with‘Honeycrisp’being the most highly represented *** resistance/susceptibility data from a two-year replicated field inoculation study and previously curated genome-wide single nucleotide polymorphism data,QTLs were consistently mapped on chromosomes(Chrs.)6,7,and *** QTLs together explained~28% of phenotypic *** Chr.6 and Chr.15 QTLs colocalized with previously reported QTLs,while the Chr.7 QTL is possibly novel.‘Honeycrisp’inherited a rare reduced-susceptibility allele at the Chr.6 QTL from its grandparent‘Frostbite’.The highly resistant IBP‘Enterprise’had at least one putative reduced-susceptibility allele at all three *** general,lower susceptibility was observed for individuals with higher numbers of reduced-susceptibility alleles across *** study highlighted QTL mapping and allele characterization of resistance/susceptibility to fire blight in complex pedigree-connected apple breeding *** gained will enable more informed parental selection and development of trait-predictive DNA tests for pyramiding favorable alleles and selection of superior apple cultivars with resistance to fire blight.

关键词： blight breeding cultivar

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亚致死氧化胁迫锻炼对橄榄假丝酵母（Candida oleophila）抗氧化基因转录表达、抗逆性及生物防控的增效作用

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保鲜与加工 2013年第1期13卷 63-63页

作者： Jia Liu Michael Wisniewskil Samir Droby john norelli Vera Hershkovitz Shiping Tian Robert Farrell US Department of Agriculture - Agricultural Research Service (USDA-ARS) Kearneysville WV USA Institute of Botany Chinese Academy of Sciences Beijing China Agricultural Research Organization (ARO) The Volcani Center Bet Dagan Israel Department of Biology Pennsylvania State University-York York PA USA

采用5mmol／L浓度的H202对橄榄假丝酵母（Candida oleophila）预处理30min，结果表明，这种亚致死胁迫处理可增强橄榄假丝酵母对于之后的致死胁迫处理（50mmol／LH202，40℃，pH4）的耐受力。与对照相比，经亚致死胁迫处理的酵母菌对于... 详细信息

采用5mmol／L浓度的H202对橄榄假丝酵母（Candida oleophila）预处理30min，结果表明，这种亚致死胁迫处理可增强橄榄假丝酵母对于之后的致死胁迫处理（50mmol／LH202，40℃，pH4）的耐受力。与对照相比，经亚致死胁迫处理的酵母菌对于接种于苹果果实上的扩展青霉菌和灰霉菌具有更好的抑制活性，且在果实伤1：2处接种初期具有较快的生长繁殖速度。采用抑制性消减杂交技术研究了酵母菌在基因表达水平上对于亚致死氧化胁迫的响应,并利用半定量RT—PCR技术明确了其转录水平。结果表明，亚致死氧化处理使酵母菌中的7个抗氧化基因发生了上调,这些基因的高表达与经胁迫处理的酵母菌中活性氧积累的减少及脂质过氧化产物含量的降低有密切联系。说明对具有生物防控能力的酵母菌采用非生物压力胁迫，可提高其中与抗氧化胁迫相关的基因表达，从而提高其生物防控效果。

关键词：抗氧化基因环境胁迫采后病害活性氧抑制性消减杂交

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