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遗传动态
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  genetic dynamics
     Monitoring genetic dynamics of Caribbean pine populations under different environments and management activities using genetic markers
     用遗传标记监测不同环境和经营措施下的加勒比松森林群体遗传动态
短句来源
     Besides, early stage evaluation of major economic traits, genetic dynamics of some traits, regeneration system of tea plant and genetic transformation were investigated and some important achievements were obtained.
     同时,对主要经济性状的早期鉴定、部分性状的遗传动态、茶树再生系统建立和遗传转化等进行了研究并取得重要成果。
短句来源
     Besides, the early stage evaluation of major economic characters, the genetic dynamics of some characters, the establishment of regeneration system of tea plant and the genetic transformation were investigated and some important achievements were obtained.
     选育出杂交新品系20个:同时,对主要经济性状的早期鉴定、部分性状的遗传动态、茶树再生系统建立和遗传转化等进行了研究并取得重要成果。
  genetic dynamic
     Genetic Dynamic Analysis on Protein Content of Indica-japonica Hybrid Rice
     籼粳交稻米蛋白质含量的遗传动态分析
短句来源
     Analysis of developmental genetic dynamic is helpful to detecting the net genetic effects in special stages, the dynamic changes of developmental behavior and the specially expressed gene.
     研究数量性状的发育遗传动态,能有效地检测出特定时段内基因表达的净遗传效应、发育性状的动态变化和特定时段内基因的表达情况。
短句来源
     A genetic branch and bound algorithm is proposed to solve the 3 machine flow-shop permutation problem,which is similar to the often used genetic local algorithm and the genetic dynamic programming algorithm.
     提出一种遗传分枝定界算法求解 3机Flow -shop调度问题 . 该算法类似于常用的遗传局部算法和遗传动态规划算法 .
短句来源
     A genetic branch and bound algorithm is proposed to solve the 3 machine flow-shop permutation problem, which is similar to often used the genetic local algorithm and the genetic dynamic programming algorithm.
     提出了一种遗传分枝定界算法求解 3机 Flow- shop调度问题 ,该算法类似于常用的遗传局部算法和遗传动态规划算法 .
短句来源
     A new chaos genetic algorithm is designed for solving a class of nonlinear bilevel mixed integer-programming problems. In this method,a self-map with good characteristics of chaos is used and the notion of chaos genetic dynamic combination coefficient is introuduced and some genetic operators are improved.
     针对一类非线性两层混合整数规划问题,选取一种混沌性较强的自映射,通过引入混沌遗传动态组合系数的概念并在改进相应遗传算子的基础上,设计了一种新型的混沌遗传算法。
短句来源
  genetic characteristics
     GENETIC CHARACTERISTICS OF SEVERAL MAJOR ECONOMIC CHARACTERS IN FRUIT TREES
     果树主要经济性状的遗传动态
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  “遗传动态”译为未确定词的双语例句
     The gene effects and genetic mechanism on early-heading character for rice mutant “Yuanfengzao”were estimated by means and mean variance of heading date of 6 generation including P_1,P_2,F_1,F_2,B_1 and B_2.The results showed that genetic model of early-maturing genes was fit for the additive-dominance model;
     利用 P_1、P_2、F_1、F_2、B_1和 B_2 6个世代抽穗期的平均数及其方差估计水稻突变品种原丰早抽穗期提早性状的基因效应及其遗传动态
短句来源
     By means of the frequencies of the eleventh allele of D13S317 loci, this paper, for the first time both domestically and abroad, counts the dynamic data of the population genetics among the Dongxiang people.
     本文在国内外首次应用D13S317基因座第 11号等位基因频率指标 ,计算了东乡族群体遗传动态数据。
短句来源
     Experiments on inheritance and selection of the leaf shape in Kengrice were conducted with 17 cultivars and 3 combinations each for F_1and F_2 during 1980-1982,the results were as follows:1)With the analysis of inheritanco of hybrid progenies,it showedthat the obtuse angle(angle between the main stem and the horizontalleaf),the length and width of the flag leaf in Keng rice were control-led by quantitative inheritance.
     本文通过对17个粳稻品种和 F_1及 F_2各3个杂交组合,进行粳稻叶型的遗传与选择的研究,经3年的试验结果:一、通过对杂交后代的遗传动态分析,表明粳稻剑叶的开张角、长和宽皆为多基因控制的数量遗传;
短句来源
     A Study on Hereditary Frends of Fuyun F_1 Generation Through lsozyme Analysis
     应用同工酶技术研究福云F_1代茶的遗传动态
短句来源
     Developmental genetic analysis of boll number and seed cotton yield per plant at different fruiting stages in Upland cotton ( Gossypium hirsutum L.).
     陆地棉(Gossypium hirsutum L.)不同铃期单株成铃数和籽棉产量的遗传动态分析
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  genetic dynamics
The spatial genetic structure within and among populations is an important part of the evolutionary and ecological genetic dynamics of natural populations, and can provide insights into effective conservation of genetic resources.
      
A computer model simulating genetic dynamics of a subdivided population at the level of a one-locus diallele system is proposed.
      
Finally, we briefly discuss the influence of host genetic dynamics in the coevolution of the system.
      
Niche construction, a term referring to the modification of their environments by any organism, can profoundly influence the genetic dynamics and structure of a metapopulation.
      
During recent years, a conceptual shift took place with respect to the genetic dynamics of influenza A viruses.
      
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  genetic characteristics
Gene frequency of five genetic characteristics in six nationalities in Southern Guizhou Province, China
      
All these show comagmatic evolutionary and genetic characteristics.
      
Molecular-genetic characteristics of the Du323 locus containing various microsatellite types in the parthenogenetic lizard Darev
      
Based on the phenotypic and genetic characteristics, the new purple sulfur bacterium was assigned to a new species of a new genus of the family Ectothiorhodospiraceae, Ectothiorhodosinus mongolicum gen.
      
The differences observed were for the most part caused by the genetic characteristics of Nentsy.
      
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The genetical expression of the progeny of citrus seedlings is closely related to the poly-embryony. The seedlings of many polyembryonic varieties of Citrus reticulata and Citrus sinensis resemble closely to their parent characters, whereas the seedlings of the monoembryonic Citrus grandis always show various variations.

本文是根据调查研究一些柑桔品种实生树的遗传动态表现以及参考一些文献材料,综合说明柑桔实生繁殖和实生选种的优缺点及其应用意义,指出在实际应用时应遵循的途径和方法,并根据遗传学原理作出理论的分析和探讨。柑桔实生繁殖,在一定地区对一定品种,以及在掌握选择和培育措施的前提下可以采用;但要求繁殖具有高度典型品种,并使提早结果,原则上应该采用嫁接繁殖。在实生繁殖时结合选种,并对现有实生树开展群众性选种工作,是获得新品种的重要途径。

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。

The analysis of their genetic parameters for some characteristics in Hevea seedling was carried out in this paper f9r studying the situation of genetics. An attempt was made to distinguish genotype through phenotype for the purpose of improving the effect of selection.According to the analysis of variance on growth and yield (from 1978 to 1979)of eight seedling crosses planted at our experiment station in 1967, it is showed that the mean heritability of these characteristics decreased in this order: thickness...

The analysis of their genetic parameters for some characteristics in Hevea seedling was carried out in this paper f9r studying the situation of genetics. An attempt was made to distinguish genotype through phenotype for the purpose of improving the effect of selection.According to the analysis of variance on growth and yield (from 1978 to 1979)of eight seedling crosses planted at our experiment station in 1967, it is showed that the mean heritability of these characteristics decreased in this order: thickness of virgin bark (0.82)→thickness of renewal bark (0.77)→dry rubber content (0.73)→circumference (0.69)→leafstalk coagulum (0.63)→rubber yield(0.42)→relative yield (0.40)→cumulative coefficient (0.36)→plugging index (0.27)→leafstalk latex tube(0.11). The first three were more stable and suffered less interference by the environmental conditions. From the analysis of genetic correlations, it can be found that dry rubber content and relative yield are most closely related to rubber yield, but the relationship between plugging index and rubber yield turns out to the contrary, suggesting that the plug of latex would cause decrease in production. Although the characteristics with high genetic correlations may be used for reference in indirect selection, it is more ideal to select those characteristics with higher heritability and close relation to yield, as the dry rubber content in our test, for example. In practice, when we use several factors in relation to yield to compose a selection index, and if only the characteristics in the index are suitably adjusted, the relative efficiency and the genetic progress will be increased in various degrees.The estimates of genetic parameters often varied with materials, years and environmental conditions. Hence, only the method of preliminary analysis is provided in this article. More work remains to be done for further resnlts.

本文根据橡胶有性系的若干性状,进行有关遗传参数的分析,并试图通过表型的表现,据以识别其基因型,期能进一步提高选择效果,为遗传动态的研究提供依据。根据我院实验场1967年定植的有性系8个组合的生长及产量资料(1978—1979年)的变量分析,结果表明各性状平均遗传力的大小依次为:原生皮厚(0.82)→再生皮厚(0.77)→干胶含量(0.73)→茎围(0.69)→叶柄胶(0.63)→干胶产量(0.42)→相对产量(0.40)→累积系数(0.36)→堵塞指数(0.27)→叶柄乳管(0.11)。其中以前三项指标为较稳定,受环境的影响较小。在遗传相关分析中,可发现干胶含量及相对产量两性状与干胶产量的相关为最密切,而堵塞指数与产量的相关恰相反,说明胶乳的堵塞会导致产量的下降。遗传相关高的性状虽可供作间接选择上参考,但以选择与产量关系既密切而遗传力又较高的性状为较理想,如本试验的干胶含量。事实证明:采用几个与产量有关的因素共同组成选择指数时,经比较发现,只要指数中的性状配合适当,其相对效率所获遗传进度将有不同程度的提高。对有关遗传参数所得的估值,常因不同材料,不同年份及不同环境条件而有不同的变化,在此本文只提供...

本文根据橡胶有性系的若干性状,进行有关遗传参数的分析,并试图通过表型的表现,据以识别其基因型,期能进一步提高选择效果,为遗传动态的研究提供依据。根据我院实验场1967年定植的有性系8个组合的生长及产量资料(1978—1979年)的变量分析,结果表明各性状平均遗传力的大小依次为:原生皮厚(0.82)→再生皮厚(0.77)→干胶含量(0.73)→茎围(0.69)→叶柄胶(0.63)→干胶产量(0.42)→相对产量(0.40)→累积系数(0.36)→堵塞指数(0.27)→叶柄乳管(0.11)。其中以前三项指标为较稳定,受环境的影响较小。在遗传相关分析中,可发现干胶含量及相对产量两性状与干胶产量的相关为最密切,而堵塞指数与产量的相关恰相反,说明胶乳的堵塞会导致产量的下降。遗传相关高的性状虽可供作间接选择上参考,但以选择与产量关系既密切而遗传力又较高的性状为较理想,如本试验的干胶含量。事实证明:采用几个与产量有关的因素共同组成选择指数时,经比较发现,只要指数中的性状配合适当,其相对效率所获遗传进度将有不同程度的提高。对有关遗传参数所得的估值,常因不同材料,不同年份及不同环境条件而有不同的变化,在此本文只提供初步分析方法,至于进一步结果,有待今后的工作。

 
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