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表达序列标签的相关文献在1997年到2020年内共计571篇,主要集中在分子生物学、畜牧、动物医学、狩猎、蚕、蜂、农作物 等领域,其中期刊论文432篇、会议论文32篇、专利文献99725篇;相关期刊210种,包括海洋与湖沼、生物技术通报、生物技术通讯等; 相关会议28种,包括中国作物学会甘蔗专业委员会第15次学术研讨会、2012年第五届全国微生物遗传学学术研讨会、中国畜牧兽医学会信息技术分会2012年学术研讨会等;表达序列标签的相关文献由1725位作者贡献,包括李德葆、董海涛、陈亮等。

表达序列标签—发文量

期刊论文>

论文:432 占比:0.43%

会议论文>

论文:32 占比:0.03%

专利文献>

论文:99725 占比:99.54%

总计:100189篇

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    • 杜超群; 许业洲; 孙晓梅
    • 摘要: 利用16个表达序列标签简单重复序列(EST-SSR)标记对日本落叶松种子园遗传多样性进行分析评价,旨在明确该种子园的遗传基础,为后期育种策略的制定和遗传改良的可持续发展提供参考依据.结果 表明:群体平均有效等位基因数(Ne)为2.542,平均观测杂合度(Ho)为0.578,平均期望杂合度(He)为0.528,平均Shannon多样性指数为0.972,平均多态信息含量指数(PIC)为0.485,日本落叶松种子园遗传多样性较高;群体中大部分位点均符合哈迪-温伯格平衡(HWE),群体内近交系数(Fis)、 群体总近交系数(Fit)均为负值,群体表现为轻微杂合子过量,不存在近交衰退;不同来源的5个群体遗传多样性各参数值差异不大,群体间遗传距离计算、 分子方差分析和主坐标分析结果均表明群体间遗传分化非常小,主要原因在于国内各栽培区引种交流频繁.
    • 杜超群; 许业洲; 孙晓梅
    • 摘要: 利用16个表达序列标签简单重复序列(EST-SSR)标记对日本落叶松种子园遗传多样性进行分析评价,旨在明确该种子园的遗传基础,为后期育种策略的制定和遗传改良的可持续发展提供参考依据。结果表明:群体平均有效等位基因数(Ne)为2.542,平均观测杂合度(Ho)为0.578,平均期望杂合度(He)为0.528,平均Shannon多样性指数为0.972,平均多态信息含量指数(PIC)为0.485,日本落叶松种子园遗传多样性较高;群体中大部分位点均符合哈迪-温伯格平衡(HWE),群体内近交系数(Fis)、群体总近交系数(Fit)均为负值,群体表现为轻微杂合子过量,不存在近交衰退;不同来源的5个群体遗传多样性各参数值差异不大,群体间遗传距离计算、分子方差分析和主坐标分析结果均表明群体间遗传分化非常小,主要原因在于国内各栽培区引种交流频繁。
    • 甘玲; 梅宏远; 杨滨宇
    • 摘要: [Objective] This study constructed the full-length cDNA library of Rongchang pig salivary glands and conducted the sequencing and analysis on expressed sequence tags (ESTs) to provide molecular information for storing,exploring and digging genetic resources of Rongchang pig.[Method] Salivary glands of Rongchang piglets at the age of 14 days were collected and SMART technology was used to construct the full-length cDNA library.Sequencing,annotation and functional analysis of ESTs were also conducted.[Result] The titer of primary library was 5.88× 106 PFU/mL and the ratio of recombinants was 99.67 %0.The average length of most exogenous inserts was among 400-2 000 bp.A total of 144 effective ESTs were obtained,including 108 unigenes with 23 contigs and 85 single sequences.Among these,77 (71.29%) sequences were known functional genes,31 (28.71%) sequences were unknown,and 18 were novel genes.Gene ontology and KEGG pathways analysis revealed that the functions of genes expressed in Rongchang pig salivary glands mainly included cellular components,molecular functions and biological processes.In the cell component category,the extracellular component had the highest ratio.In the molecular functional category,the inhibitor activity had the highest ratio.Transporting and positioning processes were the most outstanding in the biological process category.These expressed genes involved in complement and coagulation cascades,pertussis,vasopressin-regulated water reabsorption and taste transduction.[Conclusion] This study successfully constructed the full-length cDNA library and displayed the expression characteristics of Rongchang pig salivary glands.%[目的]构建荣昌猪唾液腺全长cDNA文库,并进行部分表达序列标签(ESTs)的测序及分析,为荣昌猪种质资源的保存、开发和挖掘提供重要的分子信息.[方法]以14日龄荣昌猪仔猪为材料,取其唾液腺,采用SMART法构建唾液腺全长cDNA文库,并进行ESTs测序、注释及功能分析.[结果]初级文库滴度为5.88×106PFU/mL,重组率为99.67%,大部分插入片段长度为400~2 000 bp.共获得144条有效ESTs序列,共计108条非重复序列,包括23个重叠群和85个单一序列,77(占71.29%)条序列为已知功能基因,31(占28.71%)条为未知功能序列,其中18条为新基因.GO分类和KEGG途径分析结果显示,荣昌猪唾液腺表达基因功能主要包括细胞成分、分子功能和生物学过程3个类群.在细胞成分类群中,细胞外的成分所占比例最高;在分子功能类群中,酶抑制剂活性所占比例最高;而在生物过程类群中,以转运和定位等过程最突出.表达的基因主要参与补足物和凝固级联、百日咳、加压素调控的水再吸收及味觉传导等代谢途径.[结论]成功构建了荣昌猪唾液腺全长cDNA文库,解析了荣昌猪唾液腺的表达特征.
    • 林能锋; 曾红
    • 摘要: 水滴伪康纤虫为海水养殖鱼类的重要危害性寄生虫.采用SMART技术构建营养期水滴伪康纤虫全长cDNA文库,初始文库滴度3.3×106 pfu·mL-1,文库容量约为1.5×107 pfu,重组率97%.随机挑取24个克隆,经PCR检测插入的片段长度在0.3~2.0 kb,平均长度>500 bp.挑选文库中的1 200个克隆进行表达序列标签测序,得到1 032条高质量的EST,与NCB2数据库进行比对后,获得292个同源基因,其中包含190条单拷贝EST和102个重叠群,冗余度为71.7%.有215条EST在Tetrah ymena thermophila,Paramecium tetraurelia,Ichth yophthirius multifiliis,Cryptocaryon irritans,Ox ytricha trifallax等自由生活及寄生种类的纤毛虫的基因组中比对到同源基因,其中有134条EST具有功能注释,其余为未知功能的假定蛋白基因.水滴伪康纤虫cDNA文库的构建及EST测序的完成,为进一步发现和研究水滴伪康纤虫的功能基因奠定了基础.%Pesudocohnilembus persalinus is a harmful parasite found in marine fish.Using SMART technology,a full-length cDNA library of P.persalinus was constructed.Titer of the primary library was 3.3 × 106 cfu · mL-1,and the library capacity was 1.5 × 107 cfu with a recombination rate of 97%.A PCR amplification on 24 random clones revealed that the inserted cDNA fragments ranged from 300-2 000 bp,with an average length over 500 bp.Subsequently,1 200 clones were selected from the library for EST sequencing.As a result,1 032 high-quality ESTs were obtained and assembled into 292 unigenes including 102 contigs and 190 unique ESTs with a redundancy rate of 71.7%.In a blast analysis against NCBI database,215 of the unigenes were homologous to the corresponding genes of ciliates with free-living and parasitic lifestyle,such as Tetrahyrnena therrnophila,Paramecium tetraurelia,Ichthyophthirius multi filiis,Cryptocaryon irritans,Oxytricha trifallax,etc.But,only 134 ESTs had been annotated.The remainders were hypothetical protein genes.The results obtained from this study would substantially facilitate the molecular cloning and characterization of the functional genes in P.persalinus.
    • 张飞飞; 陈璇; 陈志永; 赖崇德; 徐敏; 何明杰; 隗黎丽; 钟其旺
    • 摘要: The abundance and distribution of the microsatellites were analyzed from a total of 814 intesti-nal EST sequences of Monopterus albus in the NCBI database using the SSRrepeat software.The results showed that 51 SSR loci were found in these ESTs with a frequency of 6.27%.The most abundant EST-SSR types were trinucleotide repeats,accounting for 49.02% of the total SSRs,followed by dinucleotide,pentanucleotide,hexa-nucleotide and tetranucleotide,accounting for 29.41%,11.76%,5.88% and 3.92%,respectively.A total of 21 primers were designed according to the most appropriate flanking sequences in these SSRs,of which 12 were successfully amplified in 30 individuals and 7 polymorphic microsatellite markers were screened out.A total of 29 alleles were identified from 7 polymorphic SSR loci,ranging from 2 to 7,with an average of 4.14 alleles/lo-cus.The values of the observed and expected heterozygosity ranged from 0 to 0. 8571 and from 0. 1351 to 0.8227,respectively.The transferability of the 12 EST-SSR primers showed that 7 primers were successfully amplified in five different species belonging to order Cypriniformes and Perciformes,of which 5 primers showed polymorphism.These markers will be useful for the conservation studies and population structure assessment for these species.%利用SSRrepeat软件对NCBI数据库中黄鳝肠道EST序列进行挖掘、验证,分析微卫星(SSR)在这些序列中的总体分布特点,并开发黄鳝EST-SSR引物.结果显示,在黄鳝肠道的814条EST序列中共搜索到51个SSR位点,分布在43条EST中,出现频率为6.27%.这些EST-SSR的平均长度为18.80 bp.其中,三核苷酸重复为主导类型,占总SSR的49.02%,其次为二核苷酸重复,占29.41%.四、五、六碱基重复序列分别占微卫星总数的3.92%、11.76%、5.88%.多态性引物验证结果表明,在设计合成的21对EST-SSR引物中,12对在黄鳝中获得有效扩增.其中7对引物显示出多态性,共扩增出29个等位基因;每个位点等位基因数为2~7个(平均4.14),观测杂合度(Ho)为0~0.8571,期望杂合度(He)为0.1351~0.8227,多态信息含量(PIC)为0.1238~0.7811.在鲤形目和鲈形目中进行的跨物种扩增结果表明,12对引物中有7对引物在5个不同物种间得到成功扩增,5对引物在个别物种间表现出多态.研究获得的EST-SSR引物,可用于黄鳝的种资资源评价及遗传结构研究.
    • 徐鹏; 蔡继鸿; 郭琪; 张香桂; 徐珍珍; 沈新莲
    • 摘要: [Objective] With the development of the cotton genome sequence database and next-generation high-throughput sequencing techniques,the resources available for generating single nucleotide polymorphism (SNP) markers are gradually expanding.[Method] The Gossypium arboreum expressed sequence tags (ESTs) downloaded from the NCBI database were assembled into 7 187 contigs using the CAP3 program.Additionally,the QualitySNP program was used for SNP mining.[Result] A total of 2 690 SNPs were obtained from 807 contigs that consisted of more than four ESTs.We obtained 953 highly reliable candidate SNPs by screening for a minor loci frequency of more than 30%.Finally,a total of 149 candidate EST-SNPs that may be used in G.hirsutum were obtained through in silico screening.An allele-specific polymerase chain reaction and cleaved amplified polymorphic sequence molecular markers were used to validate the accuracy of the selected candidate SNPs in G.hirsutum.[Conclusion] The EST-SNP markers from G.arboreum may be used to analyze G.hirsutum.The obtained EST-SNP markers will be used to construct genetic maps,map important traits,and complete marker-assisted selection in G.hirsutum.%[目的]随着不同棉种序列数据库的逐步完善以及高通量测序技术的发展,棉花单核苷酸多态性(Single nucleotide polymorphism,SNP)标记开发可利用的公共数据资源逐步增加.[方法]本研究基于陆地棉祖先基因组的现代种亚洲棉表达序列标签(Expressed sequence tag,EST)数据库,利用CAP3对亚洲棉EST数据库进行拼接.拼接获得7 187个重叠群(Contig),再利用QualitySNP软件进行SNP位点分析.[结果]在807条含有4条以上EST序列的Contig中查找到2 690个SNP位点.通过筛选次要等位基因频率大干30%的位点,获得953个可靠度较高的候选SNP,通过电子筛选,最终获得可用于陆地棉分析的SNP 149个,利用位点特异性聚合酶链式反应以及酶切扩增多态序列验证了EST-SNP的准确性.[结论]本研究证实基于亚洲棉EST数据库挖掘用于陆地棉研究的EST-SNP切实可行,并有望将EST-SNP用于陆地棉遗传图谱构建、重要性状的基因定位以及分子标记辅助育种.
    • 弓清秀; 冯慧; 王茂良; 丛日晨; 徐佳; 聂秋枫; 马永硕; 王浩; 邢越; 张恒月; 赵蓓蓓; 李迎春; 辛海波
    • 摘要: [目的]分析梅EST-SSR特征及其对红叶李的可转移性.[方法]从National Center for Biotechnology Information (NCBI)下载4 589条梅表达序列标签(Expressed Sequence Tag;EST),去除无效碱基后进行拼接和简单重复序列(Simple Sequence Repeat)位点查找;设计引物进行PCR扩增.[结果]获得4 392条unigene,长度为2 420.422 kb;搜索到776个SSR位点,分布在650条EST上,出现频率为14.8%.随机设计了15对引物,以4个红叶李品种基因组DNA为模板,进行了PCR扩增,有9对引物可以扩增到清晰稳定的产物,6对多态性引物共检测出20个位点,平均每对引物可以扩增出3.3条多态性片段,平均多态性信息含量(PIC)为0.8.[结论]SSR位点在梅EST序列上分布频率较高,梅EST-SSR在红叶李中具有较高的多态性,可用于红叶李亲缘关系分析和遗传图谱构建等方面的研究.%[Objective] This study aims to characterize Prunus mume EST-SSRs and analyze their transferability to Prunus cerasifera.[Methods] A total of 4,589 ESTs were downloaded from NCBI and then the no redundant sequences were screened for SSR sites.[Results]SSR sites were found in 650 ESTs with an amount of 776 and occurrence frequency of 14.8%.Fifteen pairs of primers were designed for polymerase chain reaction using four cultivars of Prunus cerasifera as templates.Nine pairs of primers were successful for expected amplicons,and 6 pairs showed polymorphism with average values of 3.3 sites per one primer pair (average PIC=0.8).[Conclusion] These data showed that SSR sites showed a high occurrence frequency in Prunus mume,and the corresponding markers could be usable for the related studies in Prunus cerasifera.
    • 张泽彪; 赵玉华; 周文婷; 汪宇峰; 赵晨琼; 关伟军; 朱志强
    • 摘要: 构建一个优秀单板U型场地滑雪运动员血液的cDNA文库,经测序从中获取大量的表达序列标签(Expressed Sequence Tags)ESTs,用于基因筛选和功能预测.方法:通过对多名优秀冰雪运动员血液样品的总RNA进行提取、混合总RNA,合成双链cDNA、蛋白酶K消化、Sfi1酶切并连接载体、λ噬菌体的包装,经扩增最终获得优秀冰雪运动员cDNA文库;随后从文库中随机挑选500个克隆提交至北京诺赛基因组研究中心有限公司进行测序,测序结果利用Chromas软件去低质量样品,使用GenBank中的BLAST功能对所获序列进行比对获取相关信息,将获得的ESTs信息提交PANTHR和GO(Gene Ontology)生物信息数据库进行基本归类分析,从中获取运动员cDNA文库中所涵盖的重要遗传信息.结果:得到滴度分别为1.32×106 pfu/mL和1.65×1010 pfu/mL的未扩增文库和扩增后文库,扩增后文库的重组率为90.6%;得到长度在300~1100 bp序列360个,平均长度606 bp;通过BLAST比对得出201条具有注释的基因信息,利用PANTHER数据库基本分析发现这些基因分布在27个pathway上,其中TXN、MDH1、ARL1、ARPC3、ACTG1等基因分别分布在参与新陈代谢、氧化应激反应、心血管系统机能等相关联的信号通路上,推测其可能与运动能力存在关联.通过GO分析对所测序列进行归类得到在该数据库中具有功能注释的基因143个,参与31项不同功能,主要包括细胞组分、分子功能和生物过程.结论:构建了一个全长的运动员cDNA文库,其质量符合构建cDNA文库的标准.
    • 焦小利; 杨卉芯; 宋晓斌
    • 摘要: 【目的】了解细交链孢菌侵染枣果实过程的差异表达基因。【方法】以白熟期‘蜂蜜罐’枣的果实为材料,人工接种细交链孢菌,分别在接种0.5、1、2、3和4 d后取样,通过抑制性消减杂交技术(suppression subtractive hybridization,SSH)构建了病原菌诱导的差异表达的c DNA消减文库。【结果】PCR鉴定随机挑取的阳性克隆,显示插入片段大小为200~900 bp。随机挑选200个阳性克隆进行测序,利用BLASTx在Gen Bank Nr数据库进行序列比对分析,共获得118个Unigenes。对这些ESTs进行功能分类发现细交链孢菌侵染下诱导表达基因涉及植物细胞内的多种代谢和应答过程,其中包括抗病/防御类、信号传导途径类、新陈代谢类、蛋白质合成和加工类及细胞结构的组成等,尤其以抗病/防御类基因所占比例最大(27.17%)。【结论】通过SSH研究了缩果病病原侵染果实过程的差异表达基因,鉴定到一些与枣缩果病相关的基因,为进一步研究相关基因及今后筛选防治枣缩果病提供理论基础。
    • 张光望; 游杨; 罗延延; 张明菊; 李志良; 王书珍
    • 摘要: 从NCBI数据库下载了81518条生菜EST序列,处理后得到无冗余序列61757条,共搜索到2040个SSR位点,出现频率为3.3%。三碱基重复是主要的类型,占38.53%,其次是二碱基和六碱基重复,出现次数最低的是四碱基重复。在181种重复基元类型中,(AGA)n和(ATG)n是主导的重复基元类型,分别占12.01%和3.53%。设计合成的30对引物在50份生菜资源进行鉴定,共筛选出4个材料特异性标记。该研究为后续开发生菜多态性 EST-SSR标记,进行种质资源鉴定、分子标记辅助育种、遗传图谱构建奠定了基础。%From the NCBl database, 81,518 Lactuca sativa EST sequences were downloaded, from which 61,757 non-redundant sequences were obtained. ln total, 2040 SSR loci were identified, with the frequency of 3.3%. Trinucleotide repeat was dominant, fol owed by dinucleotide and hexanucleotide repeats. Among 181 types of repeat motifs, (AGA)n and (ATG)n were the dominant repeat motif types, taking up 12.01% and 3.53%, respectively. Total y, four material-special EST-SSR markers were characterized. This study enriches molecular markers of L. sativa, and also lays a theoretical foundation for fol owing germplasm identification, molecular marker assisted breeding and genetic map construction.
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