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   系统发生研究 的翻译结果: 查询用时:0.019秒
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系统发生研究
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  phylogenetic studies
     C-mos and Its Application in Phylogenetic Studies
     C-mos及其在系统发生研究中的应用
短句来源
     We introduced here a nuclear gene c-mos. This is a kind of single copy nuclear gene with no introns, totally 1 kb or so. It is now mainly applied in the phylogenetic studies of reptiles and avians.
     C-mos是一种单拷贝、无内元的核基因,全长约1kb,便于从基因组中扩增并测序,可度量中等分类阶元的亲缘关系,目前主要应用于爬行类和鸟类的系统发生研究中。
短句来源
     Although there are some limitations, the mitochondrial DNA as a modelsystem is being used as a powerful tool in phylogeny analysis. It is the only molecular marker that can be used in the phylogenetic studies at genomic level.
     线粒体DNA基因组全序列作为研究动物系统发生的模式系统,虽然有一定的缺陷,但仍是生物学家研究系统进化最有力的工具,它是目前唯一可以提供基因组水平上进行系统发生研究的分子标记。
短句来源
     The present paper summarizes the kinds of molecular information applied in the molecular phylogenetic studies of amphibians and reptiles,and introduces the published articles on molecular phylogenetics of frogs,toads,turtles,lizards and snakes.
     介绍了两栖爬行动物分子系统发生研究中选用的分子信息的种类及已发表的蛙类、蟾蜍类、龟类、蜥蜴类和蛇类等的分子系统学研究。
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  “系统发生研究”译为未确定词的双语例句
     Application of molecular methods in identification and phylogeny of Leishmania
     分子方法在利什曼原虫虫株鉴定和系统发生研究中的应用
短句来源
     PHYLOGENY OF ASIAN FRESHWATER AND TERRESTRIAL TURTLES BASED ON SEQUENCE ANALYSIS OF 12S rRNA GENE FRAGMENT
     亚洲淡水和陆生龟鳖类12S rRNA基因片段的序列分析和系统发生研究
短句来源
     Application of Molecular Biological Technology to Research of Genetic Diversity and Phylogenesis in Rotifer
     分子生物学技术在轮虫遗传多样性和系统发生研究中的应用
短句来源
     Phylogenetic Relationship among Ciconiifomes Inferred from Nuclear C-mos Gene and Mitochondial 12S rRNA Gene Sequences
     鹳形目12种鸟类核c-mos基因和线粒体12S rRNA基因序列分析及其系统发生研究
短句来源
     Application of Genetic Marker Technique to the Study of Systematics,Biodiversity and Phylogenetics for Marine Copepods
     遗传标记技术在海洋桡足类生物多样性和系统发生研究中的应用
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  相似匹配句对
     RESEARCH
     研究
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     In this study:
     研究
短句来源
     C-mos and Its Application in Phylogenetic Studies
     C-mos及其在系统发生研究中的应用
短句来源
     Molecular Phylogeny of the Superfamily Arctoidea
     熊超科的分子系统发生研究
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  phylogenetic studies
The ISSR-based phylogeny was generally consistent with Lycopersicon taxonomy based on morphological and molecular evidence, suggesting the applicability of ISSR analysis for genotyping and phylogenetic studies in tomato.
      
It may be assumed that patterns of 5'-truncated copies of R1 and R2 elements can be used as markers in population and phylogenetic studies.
      
Various approaches to the use of short retroposons for phylogenetic studies are discussed.
      
Using inter-MIR PCR technique, the relationships among the higher primates of the infraorder Catarrhini reported elsewhere were confirmed, pointing to the efficiency of the method for phylogenetic studies.
      
The proposed system is a typological one; however, it can be used as a basis for further taxonomical and phylogenetic studies.
      
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Relaving looked back to the history state of the darking beetles fauna's investigation and toxonomic study.The author have devided the nearly 200 years researches if ito 3 natural stages and introduces them one by one respectively:(1)La -Se Times(LarreilleSedlitz,1802-1900);(2)Rei - Ge Times(Renter-Gebien,1901-1945);(3)Ka-Wa Times.(Kaszab-Watt,1946-ow).The authors have briefly introduced the representives and their works.At each stage as well as the stage's characteristics; presentd there are 8 phylogetic classifications...

Relaving looked back to the history state of the darking beetles fauna's investigation and toxonomic study.The author have devided the nearly 200 years researches if ito 3 natural stages and introduces them one by one respectively:(1)La -Se Times(LarreilleSedlitz,1802-1900);(2)Rei - Ge Times(Renter-Gebien,1901-1945);(3)Ka-Wa Times.(Kaszab-Watt,1946-ow).The authors have briefly introduced the representives and their works.At each stage as well as the stage's characteristics; presentd there are 8 phylogetic classifications by Lacordaire(1859),Leconte & Horn(1883),Renter(1917),Gebien(1937 44),Koch(1955 ), Skopin(1964),Deyen(1972)and Watt(1974)etc.,which are also reviewed protiminariry and briefly.Emphasis is on the reseach results and ideas about the close relationship among Tenebrionidae and their affinis families and subfamilies as well as phylogeny of Qatt and Doyen;descriptions are made the reasons for the differentiation and integration of some tribes and groups.

回顾了全球拟步甲区系调查和分类研究的历史状况,把近200年的研究历史分为了3个自然阶段并分别予以介绍:(1)拉塞时代(Latreille-Seidlitz,1802-1900);(2)莱盖时代(Reitter-Gebien,1901-1945);(3)哈瓦时代(Kaszab-Watt,1946-现在);介绍了各阶段的特点学者及其代表作。介绍了Lacordaire(1859)、La-conte&Horn(1883)、Reitter(1917)、Gebien(1937-44)、Koch(1955)、Skopin(1964)、Doyen(1972)、Watt(1974)等9个分类系统,并对其进行了初步而简要的评述,重点介绍了Watt和Doyen关于拟步甲科与其近缘科之间、亚科间的亲缘关系和系统发生的研究结果和观点,阐述了一些类群分化或合并的缘由。

Molecular systematic analysis of 23 species of Asian freshwater and terrestrial turtles was performed at level of DNA sequence in this study. A 400bp fragment of mitochondrial 12S rRNA gene from each species was amplified with PCR technique and the PCR products were sequenced. Together with sequence data of other turtles retrieved from GenBank, the phylogenetic analysis was carried out from alignmented sequence based on the secondary structure using NJ method. The resu1ts indicate that Bataguridae has a closer...

Molecular systematic analysis of 23 species of Asian freshwater and terrestrial turtles was performed at level of DNA sequence in this study. A 400bp fragment of mitochondrial 12S rRNA gene from each species was amplified with PCR technique and the PCR products were sequenced. Together with sequence data of other turtles retrieved from GenBank, the phylogenetic analysis was carried out from alignmented sequence based on the secondary structure using NJ method. The resu1ts indicate that Bataguridae has a closer relationship with Testudinidae than that of Emydidae with Testudinidae, supporting the opinion that Platysternon should be referred as a genus of Chelydridae. Although Bataguridae is paraphyletic, the opinion of its dividing of subfamilies and complexes according to morphological and chromosomal characters is not supported by the phylogenetic relationship obtained from the sequence of 12S rRNA gene. Transversion accumulating rate of 12S rRNA is estimated as 0. 023% per million years according to sequence difference and divergence time estimated by fossil records. This rate is lower than O. 1 %~0. 2% in mammals and therefore, supports the hypothesis of low rate evolution of mtDNA in turtles.

对亚洲产淡水和陆生龟鳖类4科23个种进行了DNA序列水平的分子系统学研究,用PCR技术扩增约400bp的线粒体12SrRNA基因片段并进行了序列分析,合并从GenBank中检索到的其它龟鳖类的序列数据,在基于二级结构的对位排列基础上用邻结法进行了系统发生研究。结果表明,潮龟科与陆龟科的亲缘关系比龟科与陆龟科的近;支持将平胸龟属归为鳄龟科的1个属;潮龟科是并系起源的,从12SrRNA基因序列得到的系统发生关系不支持根据形态学和染色体性状对潮龟科的分亚科和分组。根据12SrRNA基因片段的序列差异和化石记录的分歧时间计算得到的颠换积累速率,支持龟鳖类mtDNA慢速率进化理论。

SINEs (short interspersed elements) are mobile elements of approximately 100~500 bp that are often present as more than 10 5 copies per genome. They can be divided into families and subfamilies according to the mutational or diagnostic sequence loci. SINEs are widespread in eukaryotic genomes and create additional sequence combinations through dispersal and exchange of genetic information. So, they are believed to be of major importance in creating genetic diversity, gene inactivity, new gene, and especially...

SINEs (short interspersed elements) are mobile elements of approximately 100~500 bp that are often present as more than 10 5 copies per genome. They can be divided into families and subfamilies according to the mutational or diagnostic sequence loci. SINEs are widespread in eukaryotic genomes and create additional sequence combinations through dispersal and exchange of genetic information. So, they are believed to be of major importance in creating genetic diversity, gene inactivity, new gene, and especially in gene expression and gene regulation. Almost all SINEs reported to date are derived from tRNAs, with the exception of the primate Alu and the rodent B1 families, which are derived from 7SL RNA. The tRNA derived SINEs have a composite structure, with a region homologous to a tRNA, a middle tRNA unrelated region, and a terminal AT rich region. Each SINE contains an internal promoter for RNA polymerase Ⅲ and lacks open reading frames. “Master source gene model”, “multiple source gene model”, “transposon model (parasitism model)”, and “horizontal transfer model”have been postulated to explain the origin and evolution of SINEs. The observation of their molecular phylogeny was made with examples of salmons, whales and artiodactyls,hominoid primates,and western Palearctic water frogs. Their application to genetic profiles and antitumor technique was also introduced.

短散在元件 (SINE)广布于真核生物 ,是基因组中的可转移成分 ,长约 10 0~ 5 0 0bp ,拷贝数可达数百至数十万以上 ,根据序列变异和鉴别位点常可分为若干家族和亚家族 ,对基因组的复杂化、基因的钝化、新基因的产生、尤其是基因表达的调控都具有重要意义 .除了灵长类Alu和小鼠B1家族等少数来源于 7SLRNA ,大多为tRNA的衍生物 ,由tRNA同源区、tRNA无关区和富含AT区等组成 .在tRNA同源区含有RNA聚合酶Ⅲ内部启动子成分 .其起源和进化有“主源基因模型”、“多源基因模型”、“寄生假说 (转座子模型 )”和“平行转移假说”等 .以鲑科鱼类、鲸类及偶蹄类、高等灵长类和蛙类为例 ,介绍了近年来短散在元件在分子系统发生研究以及在遗传作图和抗癌治疗上的应用

 
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