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基因     
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  gene
    CONSTRUCTION OF SMUT RESISTANT OR SUSCEPTIBLE POOLS AND MOLECULAR MARKER FOR RESISTANCE GENE IN SUGARCANE
    甘蔗抗感黑穗病池的构建和抗病基因分子标记
短句来源
    The Expression and Inheritance Stability of Bt Insecticidal Gene in Transgenic Insect-resistant Cotton Plants
    Bt杀虫基因在转基因抗虫棉中的表达与遗传稳定性的研究
短句来源
    Cloning of germin gene, synthesizing of human lysozyme gene and their expression in tobacco and oilseed rape
    Germin基因的克隆和人溶菌酶基因的合成及其在烟草和油菜中的表达
短句来源
    Study on Transfer of Chitinase Gene into Wheat
    几丁质酶(Chitinase)基因转化小麦的研究
短句来源
    Transgenic Wheat Resistant to Barley Yellow Dwarf Virus GPV Using Replicase Gene
    大麦黄矮病毒GPV株系复制酶基因介导的抗病毒转基因小麦的研究
短句来源
更多       
  genetic
    The Studies on Constructing Expression Vector of Nematode Resistance Gene and Genetic Transformation
    抗线虫基因表达载体质粒构建和遗传转化研究
短句来源
    Floral organ structural characterization,genetic analysis and molecular tagging of genes for two mutants from rice
    两份水稻花器官突变体的解剖结构观察、性状遗传分析及相关基因的分子标记定位
短句来源
    Production of Transgenic Wheat (Triticum aestivum) Plants with Insectresisting gene via Three Optimized Genetic Transformation Systems
    优化三种遗传转化体系创造转抗虫基因小麦(Triticum aestivum)新种质
短句来源
    Studies on Genetic Transformation of Bivalent Fungi-resistant Genes into Soybean
    双价抗真菌病基因对大豆遗传转化的研究
短句来源
    Optimization of Tissue Culture System and Genetic Transformation of Bivalent Insect Resistant Genes in Soybean
    大豆组织培养体系优化与双价抗虫基因遗传转化的研究
短句来源
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  genic
    Identifying on Photo-thermo Sensitive Genic Male Sterile Lines in Rice and Study on Xa21 Transgenic Progeny of Peiai64S
    水稻光温敏核不育系鉴定及培矮64S转Xa21基因后代分析
短句来源
    Cloning of Genes Associated with Taigu Genic Male Sterility of Wheat (Triticum Aestivum)
    太谷核不育小麦(Triticum aestivum)雄性不育相关基因的克隆研究
短句来源
    Molecular Biology Studies on Taigu Genic Male-Sterile Gene ms2
    太谷核不育基因ms2的分子生物学研究
短句来源
    Molecular Markers for the Dominant Genic Male Sterility Gene and the Supressor Gene in Brassica Napus and Their Applications
    甘蓝型油菜显性细胞核雄性不育基因和抑制基因的分子标记及其应用
短句来源
    Fine Mapping of the Rice Photoperiod-sensitive Genic Male Sterile Gene pms3
    水稻光敏雄性核不育基因pms3的精细定位
短句来源
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  gene source
    However, there were only several kinds of dwarf sources to have been used in rice breeding, and moreover, genetic analysis revealed the dwarf genes of these sources were mainly limited to sdl and its alleles. It is well known that the narrow background of varivation and frequent use of single gene source might become a potential bottleneck of crop breeding.
    但在水稻矮化育种中,仅有少数几个水稻矮源得到了利用,而且遗传研究表明,这些矮源携带的矮秆基因主要是半矮秆基因sdl或其等位基因
短句来源
    Many specialist of the world have research incereal's resiStance to powdery mildew pathogen at pathology of tissue's cell and molecularbiology bat have seldom relate to broad SPectrUIn resistance or totally immunity fOr makinga systematic study and offering a effective gene source.
    国内外许多学者就麦类作物抗白粉病的组织细胞病理学及小种专性抗性的分子生物学都进行了较为深入的研究,并且随抗条锈育种育成的Pm基因系列小麦品种可抗个别白粉菌株系,但就广谱免疫或近免疫型抗病方面还缺乏系统研究及有效的基因资源。
短句来源
    repens L. and E. intermedia Nevski by using SSR, in order to provide science theories basis and base to further study E. repens L. drought resistance gene molecular marker, discover excellent drought resistance gene source, fast and efficiently select with the molecular marker of drought resistance gene catena for E.
    通过对20 份来源不同的偃麦草与中间偃麦草种质材料在室内模拟逆境和田间干旱条件下进行抗旱材料的筛选和鉴定,应用SSR 技术对偃麦草抗旱分子标记进行引物筛选, 为进一步深入研究偃麦草与中间偃麦草抗旱基因分子标记、发掘优异抗旱基因源,快速高效筛选出与偃麦草与中间偃麦草抗旱基因连锁的分子标记提供科学理论依据和基础。
短句来源
    Wild relatives of wheat have a large of resistance resources, and are a rich gene source for powdery mildew resistance.
    小麦野生近缘种属蕴藏着丰富的抗性资源,是小麦白粉病抗性基因的重要来源。
短句来源

 

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      gene
    NEW TECHNOLOGY FOR DRUG DISCOVERY BASED UPON INSERTION OF LIGANDS INTO GENE SEQUENCES BY NUCLEAR RECEPTOR PROTEINS
          
    A gene regulatory mechanism has been proposed in which steroid hormones and certain other drugs bind to nuclear receptor proteins followed by transfer to DNA where they are inserted between base pairs.
          
    Polymerase chain reaction was used to amplify a 439-bp fragment of a 65,000-kDa (Mr) heat shock protein gene (hsp65) of Mycobacterium.
          
    Cloning of an APETALA3 homologous gene (PtAP3) from Populus tomentosa and genetic transformation of its sense and anti-sense con
          
    A pair of primers were designed according to published literature on Populus trichocarpa gene (PTD), and PtAP3, an AP3 homologous gene from Populus tomentosa was isolated by PCR using genomic DNA of the male clone of P.
          
    更多          
      genetic
    More particularly, Genetic Algorithms, Artificial Neural Networks and Fuzzy Logic methods seem to be the most promising tools to speed up and optimize the search for new leads and focused libraries.
          
    Herein we describe the 3D QSAR study of 4-anilinoquinoline-3-carbonitrile by Genetic Function Approximation (GFA) and Comparative Molecular Field Analysis (CoMFA).
          
    In this paper a hybrid algorithm which combines the pattern search method and the genetic algorithm for unconstrained optimization is presented.
          
    The algorithm is a deterministic pattern search algorithm, but in the search step of pattern search algorithm, the trial points are produced by a way like the genetic algorithm.
          
    Novel Quantum Genetic Algorithm and Its Applications
          
    更多          
      genic
    Expression of Fertility during Morphogenesis in Self-Pollinated Backcrossed Progenies of Barley-Wheat Amphiploids [Hordeum genic
          
    Trophic, hormonal, and electrophysiological signals of intercellular regulation are propagated along the conducting bundles and affect the intracellular membrane, metabolic, and genic control systems.
          
    Recent studies established that the specificity of phytoimmunity is shaped at the initial stages of genic interactions between a pathogen and its plant host.
          
    Identification of differentially expressed genes in photo-period sensitive genic male sterile rice by randomly amplified cDNAs u
          
    Identifying and mapping cDNA fragments related to rice photoperiod sensitive genic male sterility
          
    更多          
      gene source
    pubescens may become a gene source for the improvement of B.
          
    Scg-1 had no obvious effect on the plant growth, so it will be a useful gene source for manipulation of the protein composition in soybean seeds.
          
    The yeast Arxulaadeninivorans provides an attractive expression platform and can be exploited as gene source for biotechnologically interesting proteins.
          
    Information on the place of birth of the relevant grandparents of the PKU patients with these mutations suggests that each of these mutations in Norway has originated from a common gene source.
          
    This system may allow the use of shepherd's purse as a gene source for introgression of agronomically interesting traits intoBrassica crop species through protoplast manipulation and somatic hybridization.
          
    更多          


    Four different types of cytoplasmic male sterility in maize were tested for their identityby use of the restoration technique.Male-sterile lines incorporated with cytoplasm of theTexas source were found to be completely affected in crosses by a group of restorers includ-ing W153,W28 and G32,and partially restored by W24,M14 and A34.This made a figure of6 restorers out of about 60 inbreds thus tested in the Texas cytoplasm.Inbreds W153 wasselected as a differential restorer for T-type steriles since it gave no...

    Four different types of cytoplasmic male sterility in maize were tested for their identityby use of the restoration technique.Male-sterile lines incorporated with cytoplasm of theTexas source were found to be completely affected in crosses by a group of restorers includ-ing W153,W28 and G32,and partially restored by W24,M14 and A34.This made a figure of6 restorers out of about 60 inbreds thus tested in the Texas cytoplasm.Inbreds W153 wasselected as a differential restorer for T-type steriles since it gave no reactions to the othertypes.For the Moldavia type of male sterility,formerly offered by Prof.Hadjinov,we founda partially restoring inbred W9 to be better suited for the similar purpose.The third andfourth type of male sterility,designated as B- and G-type,came through our own selectionsfrom two Bulgarian varieties.Separation between them seemed difficult.Since A374 gavepartial pollen fertility to the B-type steriles exclusively,it could be used as a differentiat orfor this type of cytoplasm.Pollen restoration in crosses involving W153 and W28 followed the expectation based ona dominant Mendelian gene.However,data obtained from segregating progenies of doublecrosses in which G32 was the restorer suggested strongly that two dominant complementarygenes were more workable.The difference in genotype of inbreds concerned in variousinvestigations seemed to be responsible for such inconsistent results.Segregating patterns in the Texas sterile crosses of the partial restorer,W24 or M14,varied with plants used as the pollen parent and with the date of planting.It appeared verylikely that W24 and M14 were heterozygous for major restorer genes since one sterile versionof W24 and four fully restoring lines of M14 had been established by conversion and test-cross-ing respectively.Dominant modifiers might also be present in either of the inbred popula-tions.In the presence of Moldavian cytoplasm the recessive allele of the restorer gene seemedto exert an abortive action to its pollen carriers produced by the heterozygote.When plantsheterozygous for the restorer gone were outcrossed to male steriles carrying the right cyto-plasm,all plants from the progenies proved to be pollen shedders.It was suggested that theM-type cytoplasm might be similar to that of S-type.Tentative genotypes related to pollen restoration of Texas male sterility had been workedout for a number of inbreds on the basis of two dominant complementary genes.Workingschemes for the production of double-cross seeds of maize without detasseling had been sum-marized and discussed by the authers.

    三种细胞质遗传的玉米雄花不孕类型各有其专效的恢复系和部分恢复系。在 T 型细胞质基础上,测定出两对显性互补基因决定着花粉孕育性的恢复,同时还有显性修饰基因存在,影响其表现的程度。春播和夏播的不同环境条件只对部分恢复性的表现发生明显影响,对全恢复性和不孕性则很少能够改变。M 型恢复性的等位隐性基因在杂合株内对花粉粒具有某种致死或败育作用,故测交后代表现不分离现象。本文初步鉴定了若干常用自交系的 T 型恢复基因型,并以此作为根据,提出了配制全不去雄的玉米双交种的各种可能方案。

    The phenomenon of dominant and segregation of hybrids is of essential importance ingenetics.What is the rule which governs this phenomenon? According to Morganists thisphenomenon is controlled by the behavior of genes,while the Michurinists took it as the resultof mutual assimination of the germ cells of two parents.More than sixty years ago,genetists could not determine exactly how many genes are in-volved in a quantitative character,nor chould they demonstrate how the genes react.Al-though there are many theories...

    The phenomenon of dominant and segregation of hybrids is of essential importance ingenetics.What is the rule which governs this phenomenon? According to Morganists thisphenomenon is controlled by the behavior of genes,while the Michurinists took it as the resultof mutual assimination of the germ cells of two parents.More than sixty years ago,genetists could not determine exactly how many genes are in-volved in a quantitative character,nor chould they demonstrate how the genes react.Al-though there are many theories to explain this genetical phenomenon,yet it seems that noneof them is able to give a general explanation for dominance and segregation of hybrids.The aim of this paper is to analyze,mathematically the phenomenon of dominance andsegregation of hybrids in a new theory,that the average measurements of one character of thehybrids are determined by the relative intensity of heritability of the two parents withoutconsidering how many pairs of genes,or how the genes effect the character.Under certain conditions,the phenotypic expression is determined by two factors:one isthe relative intensity of heritability of two parents,and the other is the average measurementsof their characters.Besides,the nature of transmission of genetical materials to their pro-genies is also significant to the phenotypic expression of the hybrids.According to a numberof genetical data,the action of inheritance between parents and hybrids may be either arith-metical or geometrical.If we take a_1 and a_2 as the relative heritability of two parents and.P_1 and P_2 as theiraverage measuremenst of a given character,then the measurement of the character of theirhybrids will be:(i)in arithmetical relationF_1=P_1a_1+P_2a_2 (1)(ii)in geometrical relationF_1=P_1a_1.P_2a_2or lnF_1=a_1lnP_1+a_2lna_2 (2)in which a_1+a_2=1.By formulae(1)and(2),we may explain many types of genetical data in one formin which should be explained separately in the theory of genes,such as,genes of independentassortment,several types of factors interaction,and others.Other rules may also be derived from formulae(1)anh(2)as follows:Ⅰ.When the relative heritability of two parents is equal,then we have(i) in arithmetical relationF_1=1/2(P_1+P_2) (3)(ii)in geometrical relationF_1=(P_1P_2)~(1/2) or lnF_1=1/2(lnP_1+lnP_2) (4)Ⅱ.When the measurements of a character of parents and hybrids are known,we maycalculate the relative heritability of two parents by formulae(1)and(2),i.e.(i)in arithmetical relationa_1=(F_1-P_2)/(P_1-P_2) (5)and a_2=(P_1-F_1)/(P_1-P_2) (6)in which the value of a_2 is coincident with the“degree of dominance”derived by Zeleny(1920)in another way,and is equivalent to the“hybrid index”of Hubbs(see Riley,1948).(ii) in geometrical relationa_1=(lnF_1/P_2)/(lnP_1/P_2) (7)and a_2=(lnP_1/F_1)/(lnP_1/P_2) (8)Ⅲ.When the relative heritability of two parents is equal,and when the hybrids areselfed or backcrossed with their parent,then the measurement of a given character of pro-genies in second generation will be:(i) in arithmetical relation(?)(9)(ii)in geometrical relation(?)(10)These formulae are more fitting than those derived by Wright(see Power,1942)Ⅳ.When the hybrids are selfed or backcrossed for n-l generaations,the average measure-ments of a given character of progenies(no selection)will be:(i) in arithmetical relation(?)(11)Where Pr is the average measurement of the recurrent parent.The measurement of F_nis coincident with the result of Burdick(1956).(ii) in geometrical relationF_n=F_1B_n=P_r(2~(n-1))/(2n).P1/(2~n) (12)All the above mentioned equations have been proofed in theory and in practice.

    相对遗传力理论是作者根据数学原理,在遗传、育种试验基础上,提出的有关遗传传递力规律的见解。它企图在不假设任何基因的情况下,用同一的测量尺度,统一质量性状与数量性状的解说方式;直接从亲本性状的平均测定与相对遗传力,通过数学公式的运算,对杂种后代的性状数值与遗传动态(完全显性、部分显性、无显性或超亲遗传等),作一定的估算和预测。

    ~~

    鉴定出23个可保持 T 型不育性的自交系,2个 T 型恢复系。M 型不育性保持系的出现频率较低,且易受环境条件影响,利用价值较小。在试验范围内 T 型恢复性受一对显性基因控制。不育的农大10号较其可育相似者增产10%以上,不育杂交种的产量因素也较可育者为优。不育类型把较高比例的磷营养运转分配到茎中部和雌穗。不育雄穗的淀粉酶、蛋白酶和全氮量的含量与可育雄穗有所不同。

     
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