学科分类
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234 个结果
  • 简介:在种子和豆荚特点,基因优势和基因分叉的变化为Dalbergia印度黄檀Roxb的一个同种细胞的种子果园(CSO)被评估。在Bithmera,由20组成的印度从四个北状态(UttarPradesh,Uttarakhand,Haryana和Rajasthan)的不同agro气候的条件克隆。在果园的各种各样的克隆的种子和豆荚在尺寸,重量和另外的人物展出了重要可变性。重要积极关联在种子长度和种子宽度之间被观察(p<0.05),种子长度和种子厚度(p<0.01),种子长度和种子重量(p<0.01),种子厚度和种子重量(p<0.01),种子长度和萌芽价值(p<0.05)。为种子和豆荚特点的基因参数也在果园显示出大量变化。可遗传性价值被发现为大多数种子和豆荚特点是超过50%。种子重量,种子长度和种子厚度证明高可遗传性值为这些字符结合了最大的基因获得。防止D的克隆的最小的变化dendrogram。印度黄檀显示出三不同的簇;而,簇1与12更好的克隆是最大的聚类2和3分别地由七中等克隆和一差的克隆组成。吝啬的簇价值为种子重量,萌芽价值和种子长度在簇之中显示出足够的变化。在最好之间的可能的杂交到疾病的簇1克隆簇2的抵抗克隆(对致命的Gandodermalucidum根抵抗腐烂D的疾病。印度黄檀)也为进一步引起种类的计划被建议。克隆194的推广(更好表现了并且疾病抵抗)也在D的未来种植园计划被推荐。在北印度的印度黄檀。

  • 标签: 无性系种子园 种子性状 遗传分化 黄檀 印度 茯苓
  • 简介:AbstractThe recently emerged Omicron variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has quickly spread around the world. Although many consensus mutations of the Omicron variant have been recognized, little is known about its genetic variation during its transmission in the population. Here, we comprehensively analyzed the genetic differentiation and diversity of the Omicron variant during its early outbreak. We found that Omicron achieved more structural variations, especially deletions, on the SARS-CoV-2 genome than the other four variants of concern (Alpha, Beta, Gamma, and Delta) in the same timescale. In addition, the Omicron variant acquired, except for 50 consensus mutations, seven great new non-synonymous nucleotide substitutions during its spread. Three of them are on the S protein, including S_A701V, S_L1081V, and S_R346K, which belong to the receptor-binding domain (RBD). The Omicron BA.1 branch could be divided into five divergent groups spreading across different countries and regions based on these seven novel mutations. Furthermore, we found that the Omicron variant possesses more mutations related to a faster transmission rate than the other SARS-CoV-2 variants by assessing the relationship between the genetic diversity and transmission rate. The findings indicated that more attention should be paid to the significant genetic differentiation and diversity of the Omicron variant for better disease prevention and control.

  • 标签: SARS-CoV-2 Omicron Genetic diversity
  • 简介:AbstractSFTS virus (SFTSV) is a novel bunyavirus, which was discovered as the etiological agent of severe fever with thrombocytopenia syndrome (SFTS) in China in 2009, and was now prevalent in at least 25 provinces in China. SFTS was subsequently identified in South Korea and Japan in 2012. To explore the molecular evolution and genetic characteristics of this newly identified pathogen, we reported 72 whole genome sequences of SFTSV, and built a dataset of SFTSV genome sequences containing 292 L-segment, 302 M-segment and 502 S-segment. We clearly divided SFTSV into six genotypes, Genotype A-F. It was found that genotype F was the dominant epidemic genotype of Japan, South Korea, and Zhejiang province of China. The coalescent analysis supported that SFTSV originated in the early 18th century from Zhejiang province, and Genotype F was the most primitive one. Henan, Hubei, and Anhui provinces which are located in Dabie Mountain area were mainly epidemic of Genotype A, which emerged relatively late but distributed widely. A total of 37 recombination events were identified, making SFTSV with a high recombination frequency (L segment 5.1%, M segment 3.6%, S segment 0.8%) among negative-strand segmented RNA viruses. It was identified that 19 reassortant strains belonged to 12 reassortment forms of SFTSV genome containing 6 newly identified forms. The reassortment virus and recombination in tick were both found for the first time. We also found many of genotype-specific mutation sites, 7 of which could be considered as potential molecular marker for genotype classification. This study promoted a more comprehensive understanding of the phylogeny and origin, and the genetic diversity of SFTSV, and it could help the studies of other newly discovered tick-borne bunyavirus as reference data and research ideas.

  • 标签: SFTS virus (SFTSV) Next-generation sequencing Genotype Reassortment and recombination Coalescent
  • 简介:没有硬连线的连接,高精力的灯激活的opto机电的致动器的一种photostrictive类型能介绍使活动和控制效果。这份报纸经由photostrictive致动器在板结构的无线颤动控制探讨可控制性方面。一个形式的力量索引,考虑了致动器的模式数字,空间分发,和尺寸,被选择为客观功能决定photostrictive致动器的最佳的地点。线性方法论在这篇论文被建议,颤动方程在标准州空间的形式被写。基于的编码二进制代码的GA联合了最佳的放置和LQR(线性二次的管理者)控制计划被合并了,它最大化形式的力量索引,抑制的关上的环并且最小化输入光紧张到致动器。在现在的方法,三个仅仅weighting因素被用来用GA寻找最佳的Q和R矩阵,它减少染色体长度并且因此最小化计算时间。数字结果证明战略上放的致动器补丁的使用能有效地控制统治结构的颤动的基本模式。

  • 标签: 振动控制 遗传算法 无线控制 驱动器 LQR 层压板
  • 简介:Basedonthenichegeneticalgorithm,theintelligentandoptimizingmodelfortherollingforcedistributioninhotstripmillswasputforward.Theresearchshowedthatthemodelhadmanyadvantagessuchasfastsearchingspeed,highcalculatingprecisionandsuitingforon-linecalculation.Agoodstripshapecouldbeachievedbyusingthemodelanditisappropriateandpracticableforrollingproducing.

  • 标签: 小生境遗传算法 优化模型 轧制力 热轧机 带钢热连轧机 在线计算
  • 简介:Anewmethodtoreducethenumericaldispersionofthethree-dimensionalAlternatingDi-rectionImplicitFinite-DifferenceTime-Domain(3-DADI-FDTD)methodisproposed.Firstly,thenumericalformulationsofthe3-DADI-FDTDmethodaremodifiedwiththeartificialanisotropy,andthenewnumericaldispersionrelationisderived.Secondly,therelativepermittivitytensoroftheartificialanisotropycanbeobtainedbytheAdaptiveGeneticAlgorithm(AGA).Inordertodemon-stratetheaccuracyandefficiencyofthisnewmethod,amonopoleantennaissimulatedasanexam-ple.Andthenumericalresultsandthecomputationalrequirementsoftheproposedmethodarecom-paredwiththoseoftheconventionalADI-FDTDmethodandthemeasureddata.Inadditionthere-ductionofthenumericaldispersionisinvestigatedastheobjectivefunctionoftheAGA.Itisfoundthatthisnewmethodisaccurateandefficientbychoosingproperobjectivefunction.

  • 标签: 三维ADI-FDTD法 数值色散 遗传算法 人工各向异性 隐式交替方向
  • 简介:Assessmentofgeneticdiversityisanessentialcomponentingermplasmcharacterizationandconservation.TherearethreewildricespeciesinHainanProvince,includingOryzarufipogonGriff.InordertodetectthegeneticdiversityofdifferentpopulationsofOryzarufipogoninHainan,ISSR(inter-simplesequencerepeat)andSSR(simplesequencerepeat)markerswereusedtoinvestigate180accessionsfromsixlocalitiesinHainan.FourteenISSRprimersamplified185alleleswith171(92.43%)polymorphic,thenumberofallelesrangedfrom8to17,withanaverageof13.14allelesperlocus.Thirty-eightpairsofSSRprimersusedinthisstudyamplified213alleleswith190(89.20%)polymorphic,thenumberofallelesrangedfrom2to14,withanaverageof5.66allelesperlocus.BothISSRandSSRanalysesrevealedahighlevelofgeneticdiversityinthewildpopulations.ThepopulationwiththehighestgeneticdiversityisWanning(WN),andthepopulationwithlowestgeneticdiversityisWenchang(WC).TheresultsofaUPGMAclusterusingtheNTSYSprogramshowedthateachpopulationhasalowdegreeofgeneticdifferentiation.Furthermore,theManteltestrevealedthatthegeneticsimilaritiesdetectedbyISSRandSSRweresignificantlycorrelated(r=0.8634,t=93.67)whendetectinggeneticdiversityatthespecieslevel.ThetwomolecularmarkersystemswereabletodeterminethegeneticdiversityamongOryzarufipogon,andthetwogroupsofindexesobtainedbyusingthetwomarkershaveahighlevelofconsistency.

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  • 简介:这篇文章在端对端的交换子在异构的收音机存取技术(老鼠)之中为联合收音机资源管理(JRRM)作为一条自治途径介绍基因算法(GA)可计算的系统。联合会话承认控制(JOSAC)和带宽分配作为基因算法的操作与某些明智的修正做的一个特定的决定被联合。建议算法在下列二个条件上被触发。当一个会议被开始时,让会议在最适当的老鼠上宿营并且为需要的服务选择最合适的带宽被触发。当一个会议终止时,通过移交调整进行中的会议的分发也被用来。这将为最好的系统表演增加JRRM控制器的调整频率。模拟结果显示建议自治JRRM不仅有效地策划移交预定,而且完成很好的还原剂在光谱用途和堵住的概率之间的交易。

  • 标签: 通信网 网络建设 通信系统 设计方案
  • 简介:客观:为了探索可行性构造遗传工程人,神经干细胞(hNSCs)由lentivirus调停了多表示基因以便为针的绳索损害(SCI)的进一步的研究提供接枝来源。方法:从人的流产胎的大脑外皮的人的神经干细胞被孤立并且有教养,然后,基因被lentivirus修改两个都表示绿荧光蛋白质(GFP)和老鼠neurotrophin-3(NT-3);转基因的表示被荧光显微镜,胎儿的老鼠的背面的根中心和槽污点的方法检测。结果:遗传工程hNSCs成功地被构造。所有在荧光显微镜下面表示了明亮绿的荧光的遗传工程hNSCs被观察。转基因的hNSCs的调节媒介能导致从背面的根中心(DRG)挥舞长出的神经突。遗传工程hNSCs表示了高级NT-3which能被使用槽污点检测。结论:遗传工程hNSCs调停了bylentivirus能被构造多成功地表示基因。

  • 标签: 遗传因素 实验研究 神经干细胞 多基因
  • 简介:在现代数据中心,网络消费的电源是全部的精力预算并且这样的看得见的部分改进数据中心网络(DCN)的精力效率真正有关系。为这精力效率的一个有效方法是由流动巩固与交通要求一起使DCN的尺寸有弹性,关掉减少电源消费的不必要的网络部件并且安排的带宽,即。同时,为数据中心管理有本能支持,软件定义联网(SDN)提供一个范例有弹性地控制DCN的资源。完成如此的电源积蓄,大多数优先的努力就采用简单贪婪对还原剂启发式计算复杂性。由于贪婪算法的固有的问题,然而,好足够的优化不能总是被保证。处理这个问题,一个修改混合基因算法(MHGA)被采用改善答案精确性,和SDN的有细密纹理的路由功能充分被利用。模拟结果证明更有效的电源管理能比以前的研究被完成,由增加大约5%网络精力积蓄。

  • 标签: 数据中心网络 精力效率 软件定义联网 有弹性的拓扑学 基因算法
  • 简介:Distributionsofpubescencesonleafbladeandhullinjaponicaricewereobservedunderanopticalmicroscope.NumbersofleafandhullpubescencesinP1,P2,F1,B1,B2andF2generationswereinvestigatedinthreecombinationsofjaponicarice(Sidao10A/Wuyujing3R,Wuyujing3A/Sidao10RandLiuyan189A/HR-122),andgeneticanalysisforthesetwotraitswereconductedbyusingthejointanalysismethodofP1,P2,F1,B1,B2andF2generationswiththemixedmajorgenepluspolygeneinheritancemodels.Leafpubescencescharacterizedbyswollenbaseandfinetipdistributedregularlyontheboundarybetweendarkgreenstripeandlightgreenstripeofleafblade.Hullpubescenceswithvariouslengthsdistributedirregularlyonthewholehull.NumbersofleafpubescencesinthereciprocalcombinationsofSidao10A/Wuyujing3RandWuyujing3A/Sidao10Randnumbersofhullpubescencesinallthethreecombinationswerecontrolledbyonepairofadditivemajorgenesplusadditive-dominantpolygenes.InthecombinationofLiuyan189A/HR-122,numberofleafpubescenceswascontrolledbyonepairofadditive-dominantmajorgenesplusadditive-dominantpolygenes.Bothnumbersofleafandhullpubescencesweremainlygovernedbymajorgenes.

  • 标签: genetics JAPONICA rice LEAF pubescence HULL
  • 简介:ThispaperaddressestheintegratedEarthobservationsatelliteschedulingproblem.Itisacomplicatedproblembecauseobservinganddownloadingoperationsarebothinvolved.Weuseanacyclicdirectedgraphmodeltodescribetheobservinganddownloadingintegratedschedulingproblem.Basedonthemodelwhichconsideringenergyconstraintsandstoragecapacityconstraints,wedevelopanefficientsolvingmethodusinganovelquantumgeneticalgorithm.Wedesignanewencodinganddecodingschemethatcangeneratefeasiblesolutionandincreasethediversityofthepopulation.TheresultsofthesimulationexperimentsshowthattheproposedmethodsolvestheintegratedEarthobservationsatelliteschedulingproblemwithgoodperformanceandoutperformsthegeneticalgorithmandgreedyalgorithmonallinstances.

  • 标签: Earth OBSERVATION SATELLITE INTEGRATED SCHEDULING quantum
  • 简介:PCR-DGGEapproachwasusedtoanalyzebacterialdiversityinthebottomsectionofsevenarcticseaicesamplescolletedfromtheCanadaBasin.Thirty-two16SrDNAsequenceswereobtainedfromprominentDGGEbands.Theclosestrelativesofthesesequencesarefoundtobethoseofcultivatedorunculturedbacteriafromantarcticorarcticseaice.Phylogeneticanalysisclusteredthesesequencesorphylotypeswithinα-proteobacteria,γ-proteobacteriaandCFB(cytophaga-flexibacter-bacteroides)group.Sequencesbelongingtoγ-proteobacteriaweredominantandmembersoftheCFBgroupwerehighlyabundant.ItwassuggestedthattheCFBgroupwastherepresentativeofthebottomsectionofseaicesamples.

  • 标签: sea ICE ARCTIC OCEAN BACTERIA 16S
  • 简介:Anapproachforgeneratinginteractive3Dgraphicalvisualizationofthegeneticarchitecturesofcomplextraitsinmultipleenvironmentsisdescribed.3Dgraphicalvisualizationisutilizedformakingimprovementsontraditionalplotsinquan-titativetraitlocus(QTL)mappinganalysis.Interactive3DgraphicalvisualizationforabstractexpressionofQTL,epistasisandtheirenvironmentalinteractionsforexperimentalpopulationswasdevelopedinframeworkofuser-friendlysoftwareQTLNetwork(http://ibi.zju.edu.cn/software/qtlnetwork).Noveldefinitionofgraphicalmetasystemandcomputationofvirtualcoordinatesareusedtoachieveexplicitbutmeaningfulvisualization.Interactive3DgraphicalvisualizationforQTLanalysisprovidesgeneticistsandbreedersapowerfulandeasy-to-usetooltoanalyzeandpublishtheirresearchresults.

  • 标签: 遗传结构 数量性状基因座 三维图形可视化 复杂性状
  • 简介:Thispaperproposesanewadaptivelineardomainsystemidentificationmethodforsmallunmannedaerialrotorcraft.Byusingtheflashmemoryintegratedintothemicroguidenavigationcontrolmodule,systemrecordsthedatasequencesofflighttestsasinputs(controlsignalsforservos)andoutputs(aircraft’sattitudeandvelocityinformation).Afterdatapreprocessing,thesystemconstructsthehorizontalandverticaldynamicmodelforthesmallunmannedaerialrotorcraftusingadaptivegeneticalgorithm.Theidentifiedmodelisverifiedbyaseriesofsimulationsandtests.Comparisonbetweenflightdataandtheone-steppredictiondataobtainedfromtheidentificationmodelshowsthatthedynamicmodelhasagoodestimationforrealunmannedaerialrotorcraftsystem.Basedontheproposeddynamicmodel,thesmallunmannedaerialrotorcraftcanperformhovering,turning,andstraightflighttasksinrealflighttests.

  • 标签: SMALL unmanned AERIAL ROTORCRAFT dynamic space