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570篇 您的检索式:作者名="Todd C"
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1黄瓜黑色果刺基因染色体定位及候选基因分析显示文摘【目的】黄瓜作为重要的果菜类蔬菜,果实品质一直是黄瓜育种研究的重点。果实品质包括内在品质和外观品质,其中外观品质对黄瓜的商品性具有重要影响。果刺颜色作为黄瓜重要的品质性状之一,对其进行遗传分析和基因定位将有助于了解果刺颜色遗传的分子机理,为黄瓜果实性状改良提供理论依据和技术支撑,同时也可为刺色基因的精细定位及克隆奠定基础。【方法】研究利用黄瓜白色果刺自交系GY14(P1)和黑色果刺自交系NC76(P2)为亲本构建遗传群体,进行黄瓜果刺颜色的遗传分析。以F2分离群体为试材,应用分离群体分组分析法(BSA)和2 112对SSR引物进行SSR分析,结合9 930黄瓜全基因组序列信息和100份核心种质重测序结果开发新标记,对初定位区域进行标记加密。采用JoinMap 4.0作图软件和MapInspect软件构建连锁群并完成连锁群与染色体的对应,实现黄瓜黑色果刺性状的基因定位。运用生物信息学,在定位区域进行候选基因分析。利用包含156个株系的重组自交系(RILs)群体,对黑色果刺基因紧密连锁的两侧翼分子标记进行验证,确定标记用于分子标记辅助选择(MAS)育种的准确性。【结果】研究表明,黄瓜自交系NC76的黑色果刺符合质量性状遗传特点,由显性单基因B控制,黑色对白色为显性。初步定位筛选获得了与B基因连锁的8对SSR引物,将B定位于黄瓜4号染色体(Chr.4)上,最近的连锁标记为SSR22231,遗传距离为10.8 cM;根据初定位区域的序列信息,设计合成了新的SSR引物212对和Indel引物25对,利用这些引物对双亲和F2群体DNA进行分析,最终构建了一个包含14个SSR标记和1个InDel标记的分子标记连锁群,获得与B连锁的两侧翼标记SSRB-181和SSRB-130,遗传距离分别为2.0 cM和1.6 cM,该区段物理距离为422.1 kb,有60个预测候选基因,推测Csa4G003095和Csa4G001690是与黑色果刺形成相关性较大的候选基因。与B紧密连锁的两侧翼标记用于MAS育种的准确率分别为96.8%和96.2%,其中SSRB-181对黑色果刺植株鉴定的准确率达到100%,将在MAS育种发挥重要作用。【结论】黄瓜自交系NC76的黑色果刺性状由显性单基因控制,该基因位于Chr.4上422.1 kb范围内,两侧翼标记为SSRB-181和SSRB-130,遗传距离为3.6 cM。本研究结果为黑色果刺基因的精细定位和克隆及MAS育种奠定了良好基础。刘书林 顾兴芳 苗晗 王烨 Yiqun Weng Todd C Wehner 张圣平 2014中国农业科学2014,47,1:11
2含高钙和维生素D的强化奶能有效提高健康的绝经后的中国女性体内的维生素D水平并减少骨吸收显示文摘目的钙摄入水平低以及体内维生素D不足是导致亚洲女性罹患骨质疏松的危险因素。此项研究的目的是评估高钙维生素D强化牛奶(HCM)对健康的中国绝经后妇女的体内维生素D状态和骨吸收标志物进行干预的影响。方法本试验对象为55岁以上,绝经至少5年的女性。共有124名女性进行了总体健康状况和骨密度检查筛选。63名女性被随机分为对照组和试验组,试验组在12w内每日饮用两次高钙/维生素D强化奶(含900 mg钙、96 mg镁、2.4 mg锌和6.4μg维生素D)。2组分别在试验开始、试验2 w、8 w和12 w时测量血矿物质、25(OH)维生素D3和Ⅰ型胶原C端肽(CTX)水平。结果对照组女性平均年龄为63±4.6岁,高钙强化奶(HCM)组女性平均年龄为62±3.8岁。所测得的每日钙摄入量的基线值为HCM组260~482 mg,对照组为252~692 mg。12 w后HCM组的平均身体质量指数(BMI)显著降低(P<0.05)。HCM组的血25(OH)维生素D3水平显著提高(33.13~39.49 nmol/L),而对照组则维持不变(29.27~28.21 nmol/L)。HCM组的血CTX水平在0 w和2 w之间下降了25%,并保持不变直至第12w。从第2w开始HCM组和对照组相比血CTX水平就出现了显著差异(P<0.001)。结论通过饮用含高钙和维生素D的强化奶(HCM),在2至4w内能显著提高中国绝经妇女体内维生素D水平,并减少骨吸收破坏。如果长期持续地饮用含高钙和维生素D的强化奶(HCM),能减少骨吸收和骨量丢失的风险,从而减少患骨质疏松和由此引起骨折的风险。Marlena C Kruger PengCheng Ha Joanne M Todd Barbara Kuhn-Sherlock Linda M Schollum Jiliang Ma George Qin Edith Lau 2013中国骨质疏松杂志2013,19,2:2
3Satellite identification of rain days over the upper Nile river basin using an optimum infrared rain/no-rain threshold temperature model显示文摘Todd M E C Barrett M J Beaumont 1995J Appl Meteor1995,34,:2
4Guidelines for the ultrasound assessment of endothelial-dependent flow-mediated vasodilation of the brachial artery显示文摘Mary C Corretti Todd J Anderson Emelia J Benjamin David Celermajer Francois Charbonneau Mark A Creager John Deanfield Helmut Drexler Marie Gerhard-Herman David Herrington Patrick Vallance Joseph Vita Robert Vogel 2002Journal of the American College of Cardiology2002,,:2
5Stability of fruit quality traits in diverse watermelon cultivars tested in multiple environments显示文摘Lycopene is a naturally occurring red carotenoid compound that is found in watermelon.Lycopene has antioxidant properties.Lycopene content,sugar content and hollowheart resistance are subject to significant genotype×environment interaction(G×E),which makes breeding for these fruit quality traits difficult.The objectives of this study were to(i)evaluate the influence of years and locations on lycopene content,sugar content and hollowheart resistance for a set of watermelon genotypes,and(ii)identify genotypes with high stability for lycopene,sugar,and hollowheart resistance.A diverse set of 40 genotypes was tested over 3 years and 8 locations across the southern United States in replicated,multi-harvest trials.Lycopene was tested in a subset of 10 genotypes.Data were analyzed using univariate and multivariate stability statistics(BLUP-GGE biplot)using SASGxE and RGxE programs.There were strong effects of environment as well as G×E interaction on watermelon quality traits.On the basis of stability measures,genotypes were classified as stable or unstable for each quality trait.'Crimson Sweet'is an inbred line with high quality trait performance as well as trait stability.'Stone Mountain','Tom Watson','Crimson Sweet'and'Minilee'were among the best genotypes for lycopene content,sugar content and hollowheart resistance.We developed a stability chart based on marketable yield and average ranking generated from different stability measures for yield attributes and quality traits.The chart will assist in choosing parents for improvement of watermelon cultivars.See http://gffzz783b6e01a04243c3h9vpo5b6ux9nw6wbo.ffgz.tsg.suse.edu.cn/cucurbit/wmelon/wmelonmain.html.Mahendra Dia Todd C Wehner Penelope Perkins-Veazie Richard Hassell Daniel S Price George E Boyhan Stephen M Olson Stephen R King Angela R Davis Gregory E Tolla Jerome Bernier Benito Juarez 2016Horticulture Research2016,3,1:2
6Distribution of beta-glucanases within the genus Bacillus 显示文摘Martin D F Priest F G Todd C 1980Appl Environ Microbiol1980,40,6:1
7Monitoring surface and subsurface water storage using confined aquifer water levels at the Savannah River Site, USA 显示文摘Todd C Rasmussen Thomas L Mote 2007Vadose Zone2007,6,2:1
8Extensive neurite out-growth and active synapse formation on self-assembling peptide scaffolds 显示文摘Todd C H Sonsoles L Xing S 2000PNAS2000,97,12:1
9Microsatllites for linkage analysis of genetic traits显示文摘Hearne C M Ghosh S Todd J A 1992Trends in Genetic1992,8,:1
10Quality and chemistry of throughfall as influenced by forest type and season显示文摘Henderson G S Harris C F Todd D E 1977Journal of Ecology1977,65,2:1
11Guidelines for Conscious Sedation and Monitoring During Gastrointestinal Endoscopy显示文摘J.Patrick Waring Todd H Baron William K Hirota Jay L Goldstein Brian C Jacobson Jonathan A Leighton J.Shawn Mallery Douglas O Faigel 2003Gastrointestinal Endoscopy2003,,3:1
12Components and systems for long- wavelength monomode fibre transmission 显示文摘Garrett I Todd C 1982J Opt Quan Electron1982,14,2:1
13A single chicken anemia virus protein induces apoptosis显示文摘Noteborn M H Todd D Verschueren C h 1994J Viro11994,68,1:1
14Unrave- ling the Chronic Toxicity of Lead:an Essential Pri- ority for Environmental Health 显示文摘Todd A C Wetmur J G Moline J M 1996Environ Health Perspect1996,104,4:1
15A single Chicken anemia virus protein induces apoptosis显示文摘NOTEBORN M H TODD D VERSCHUEREN C V 1994Virol1994,68,1:1
16Performance characteristics for the quantitation of plasma HIV-1 RNA using branched DNA signal amplification technology 显示文摘Todd J Pachl C White R 1995J Acquir Immune Defic Syndr Hum Retrovirol1995,10,2:1
17Preliminary estimates of the cost of foodborne disease in the United States显示文摘Todd E C D 1989J Food Protection1989,52,:1
18Microbiological safety standards and public health goals to reduce food borne disease显示文摘Ewen C D Todd 2003Meat Science2003,66,:1
19Transgenic soybeans expressing siRNAs specific to a major sperm protein gene suppress Heterodera glycines reproduction 显示文摘Steeves R M Todd T C Essig J S 2006Functional Plant Biology2006,33,:1
20Microsatellites for linkage analysis of genetic traits显示文摘Hearne C M Ghosh S Todd J A 1992Trends in Genetics1992,8,:1
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