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crossing parents
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  杂交亲本
     The useful value as crossing parents on the new CP varieties intro- duced in 1980 were detailed studied. The results indicated that their hybrid progenies had the characteristics of early maturing,high sugar content, high yield and excellent ratooning ability. From these progenies,many good varieties,such as Yuetang 83/271,83/251,83/257,had been selected.
     较详细研究了1980年引进的运河点(CP 系)甘蔗品种作杂交亲本的利用价值,结果表明杂交后代表现早熟、高糖、丰产、宿根性好,从中选育出如粤糖83/271、83/257、83 /251等优良的甘蔗新品种。
短句来源
     Quantitative Relationship Between Genetic Distance Among Crossing Parents and F1 Heterosis Rate in Bombyx mori. L.
     家蚕杂交亲本遗传距离与F_1杂种优势率间的定量关系
短句来源
     Assembling analysis on 780 synthetic indexes of hybridization were carried out and divided into 5 groups at the same time. The average synthetic index of assembling groups is u = 18. 209. Crossing parents should be selected within groups u≥18. 209. In this test Ⅰ and Ⅴ , Ⅲ and Ⅳ , Ⅳ and Ⅴ , satisfied the above conditions.
     同时对780个杂交综合指数进行聚类分析,共划分5个类群,类群间平均杂交综合指数=18.209,应在u≥18.209的类群之间选择杂交亲本。 本试验中满足上述条件的有Ⅰ和Ⅴ、Ⅲ和Ⅳ、Ⅳ和Ⅴ。
短句来源
     Quantitative Change of Components in the Best Nutrient pI Range of Endosperm Proteins in Indica Rice Crossing Parents and Their F_1 Generation and the Influence of Cropping Seasons on It
     籼稻杂交亲本与其F1代胚乳蛋白最高营养pI范围内组分之量变及种植季节对其影响
短句来源
     Application of Multivariate Analysis in Soybean Crossing Parents Selection
     多元分析在大豆杂交亲本选配方面的应用
短句来源
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  亲本杂交
     The analyses on the nitrate content variation between parents and filial generation and on the nitrate content distribution among different lines of filial generation population showed that the nitrate content in spinach was controlled by the additive genes. Breeding practice also proved that the hybrid with low nitrate content and high yield could be obtained by crossing parents with low nitrate content.
     通过亲子代硝酸盐含量变异的分析以及对杂交后代群体不同株系硝酸盐含量变化的分布状况,初步认为蔬菜硝酸盐含量主要由累加基因所控制,可通过筛选低NO3-的亲本杂交,有可能获得NO3-含量低且高产的杂交一代品种,育种实践验证了上述分析的正确性。
短句来源
  “crossing parents”译为未确定词的双语例句
     The comprehensive characters of Yuenong 88/488, Yuenong 88/489, chuantang 88/598, chuantang 85/591 were low. They can not be used directly, but can be used as crossing parents considering their high sucrose contents.
     粤农88/488、粤农88/489、川糖88/598、川糖85/591的评判值低,综合表现差,但是其蔗糖分高,可考虑作为高糖亲本利用。
短句来源
     The selection of crossing parents and the natures of genetic variation of F 2 and F 3 were analysised in the grain amylose content from 15 cross combinations based on the diallel crossing system 4 of Griffing with 6 Japonica rice varieties in the similar content.
     利用稻米直链淀粉含量相近的 6个粳稻品种 ,以 Griffing双列杂交方法 4配制 15个杂交组合 ,对亲本选配与 F2 、 F3籽粒直链淀粉含量的遗传变异特点进行了分析。
短句来源
     Application of Systematic Cluster Analysis Method in Pepper Crossing Parents Selection
     系统聚类分析法在辣椒亲本选配上的应用
短句来源
     Selection and Genetic Analysis for the Crossing Parents of Energy Cane
     能源甘蔗亲本选配及遗传分析
短句来源
     The analysis of combining ability showed that Father plant 290-1 and Male sterile line 240 which had high GCA could be regarded as good crossing parents.
     配合力分析表明:一般配合力较好的父本290-1和雄性不育系240可作为优良的杂交育种亲本;
短句来源
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  crossing parents
Rnand Riappeared to be present in the investigated plant material, containing R4 and R10, or in one of the susceptible crossing parents.
      
Knowledge of the genetic diversity of a species is important for the choice of crossing parents in line and hybrid breeding.
      
Three additional biparental populations were developed by crossing parents that were assumed to be unrelated.
      
Three biparental soybean {Glycine max (L.) Merr.} populations were developed by crossing parents that were closely related, based on pedigree relationships.
      
DNA markers associated with good anther culture ability can be selected for crossing parents and breeding lines.
      


This parper reports that the Qm biosynthesis ability can transfer from q+ donor to q~ recipient when the two parent strains were grown together on a same slant. Transfer frequency was in the range of 0.03-100% according to the different properties of mating strains. Using auxotrophic mutants of q+ and q- as crossing parents, 50-100% of prototrophic recombinants with Smr marker have gained the Qm biosynthesis ability and there were also about 20-90% of the colonies out of the excess q- recipient with the...

This parper reports that the Qm biosynthesis ability can transfer from q+ donor to q~ recipient when the two parent strains were grown together on a same slant. Transfer frequency was in the range of 0.03-100% according to the different properties of mating strains. Using auxotrophic mutants of q+ and q- as crossing parents, 50-100% of prototrophic recombinants with Smr marker have gained the Qm biosynthesis ability and there were also about 20-90% of the colonies out of the excess q- recipient with the original markers in the mixed spore suspension transfered to q+. Such transfer occurred at the myceliul stage and was interfered by the presence of AY, EB, SDS, and high temperature preincubat.ion. So we consider that the plasmid related to Qm biosynthesis has the infectious transfer function and is designated by the name of SQP1.

本研究表明不同类型的q~+、q~-衍生菌株混合培养,Qm的合成能力可以从q~+供体转移给q~-受体,其频率因配对菌株的特性不同而在0.03—100%范围内。当q~+、q~-的营养缺陷型作为两亲株进行杂交时,形成的Sm~r原养型重组子中有50—100%获得了合成Qm的能力,混合孢子中没有重组并带有原来标记的q~-受体菌有20—90%由q~-转变成q~+。这种转移发生在菌丝阶段,并受AY、EB、SDS或高温培养的干扰,据此我们认为这个与Qm合成有关的质粒具有感染性转移的功能,并命名为SQP1。

The analytical results indicate that the combining abilities of all other four characters appear significant both in modelⅠand modelⅡ, except in the ordinary combining ability of lycopene content is significant but its specific one is unsignificant. Therefore, the use of pedigree method which might give better effect is re-commended to breed tomato for preserving and canning purpose. The results also express that lycopene content is mainly a character of accumulative effect of gene, while the yield and other...

The analytical results indicate that the combining abilities of all other four characters appear significant both in modelⅠand modelⅡ, except in the ordinary combining ability of lycopene content is significant but its specific one is unsignificant. Therefore, the use of pedigree method which might give better effect is re-commended to breed tomato for preserving and canning purpose. The results also express that lycopene content is mainly a character of accumulative effect of gene, while the yield and other characters have both accumuative and nonaccumulative effect of gene. The effective values of general combining ability are various between cultivars. Those values of Rome No1 and Rome VF show significantly positive heterosis, except for the average weight per fruit. The value of fluctuated variance is large in specific combining ability of Rome No1, it shows that Rome No1 acting as crossing parents has various appearances. Some assortments of gene are very good, but some of them appear badly. The variance value of specific combining ability of Rome VF is small, it shows that those characteristics including lycopene and soluble contents, average weight per fruit etc can be passed on uniformly from Rome VF acting as parent plant to its F_1 generation. Rome No1 and Rome VF may be considered as rather good parent materials for brceding of preserving and canning tomato varieties, especially the latter. By the estimation of inheritance ability, it was found that the ability of lycopene and soluble solid contents are higher than that of yield, average weight per fruit and fruits number per plant. Therefore, such characters as lycopene and soluble solid contents can be selected at earlier generation, while the average weight per fruit, fruits number per plant and yield had better be selected at later generation.

本文对产量、平均单果重、单株结果数、可溶性固形物含量、红色素含量五个性状进行了一般配合力和特殊配合力分析。结果表明,除红色素一般配合力显著而特殊配合力不显著外,其余四个性状无论在模型Ⅰ或模型Ⅱ都显著。表明红色素含量这个性状主要是基因累加效应,而产量等性状既有累加效应又有非累加效应。根据估算遗传力来看,红色素含量、可溶性固形物遗传力比较高,而产量、平均单果重、单株结果数的遗传力比较低。所以对红色素、可溶性固形物在早期世代可进行选择,而单果重、单株结果数、产量在后期世代加以选择效果更理想。

The large and contineuous genetic variation of the agronomic characters of soybeans provides the possibility for selection by various environmental conditions to form enormous kinds of types and varieties. The wide range of climatic arid cultural conditions as well the diverse usage of soybeans in China causes Chinese soybean germplasms to be exceedingly prolific.Soybeans in the extreme north part of Heilonggiang Province(50°N.)are of extremely early maturing and day neutral type, while those of Guandong Province...

The large and contineuous genetic variation of the agronomic characters of soybeans provides the possibility for selection by various environmental conditions to form enormous kinds of types and varieties. The wide range of climatic arid cultural conditions as well the diverse usage of soybeans in China causes Chinese soybean germplasms to be exceedingly prolific.Soybeans in the extreme north part of Heilonggiang Province(50°N.)are of extremely early maturing and day neutral type, while those of Guandong Province (22.5N,) are of very late maturing and typical short day types. Between there there are the concecutive transitional forms. Soybeans in Yangtze River valley of 30-32°N. consisted of nearly day neufral, moderate short day, and typical short day types to meet the diverse kinds of cropping system. It is therefore we do believe that, soybean germplasms in Yangtze River Valley is the most pentiful in contrast to those of other regions.In the main soybean producing area of North East, the weight of 100 seeds is around 18-22g., while in the west part of North East, where the annual rainfall is only 400-500mm and soil is more or less alkaline the weight of 100 seeds is around 13-16g.. In the Loess Plateau area of the Shanxi and Shaanxi provinces, small black seeded soybean is the dominant type. In the area of Yangtze River Valley, size of soybean seeds varies greatly according to the usage and cropping systems encountered.Determinate soybeans are prevalent in areas of Yangtze River Valley where the farming condition is intensive. For the purpose of developing cultivars with tall and stiff stem, soybean with developed main stem, moderate branches, more nodes on main stem and adaptability to machine harvesting, were developed. Germplasms of indeterminate and emi-determinate soybeans in the main soybean producing area of North East is promising for using as crossing parents.Soybean germplasms in areas of Yangtze River Valley are valuable for their high protein content(over 45%).Soybean varieties collected from main soybean producing area of North East have higher oil content (20-23%) but moderate protein content (37-40%).Sources of genes of resistance to soybean diseases may be present in soybean germplasms grown in many places in China, but they can only be biscovered by screening. For hunting the genes of disease resistance we should collect soybean accessions from both the epidemic regions and the disease free regions.The Loess Plateau of north Shanxi and Shaanxi provinces is the most typical small-seeded black soybean region. In places where crop ultural level is high and soybeans are produced as conlmercial commodity, seed coat of soybeans are mostly yellow. In North East c of China, traditionally soybeans were produced as commercial commodity, therefore yellow soybeans with light hilum color were prefered for growing, The elimination of gene T which causes both heavy hilum color and tawny pubescence causes almost all the cultivars in the main producing area of North East are with grey pubescence.In area of Yangtze River Valley, soybeans with tawny pubescence and heavily colored hilum are dominant in preva-lence.

我国地域辽阔,各地的自然条件,耕作栽培条件差异很大,对大豆的利用要求也十分不同,经过此等不同条件的长期选择,使我国的大豆品种资源丰富多彩,而且生态地理的分布规律也十分明显。在我国黑龙江省的北部,极早熟的中日性大豆方可适应,而在低纬度的广东地区,极迟熟的典型短日性品种,才是适应类型。这南北两地区之间的大豆,在生育期类型上,作连续性的过渡变化。在长江流域地区,于较长的无霜期期间,光照长短的变化较大,栽培制度复杂,因此大豆的生育期类型最为繁多,大豆的品种资源远较其它地区丰富。东北大豆主产区大豆的百粒重在18—22克左右,而东北西部干旱盐碱地区大豆的百粒重仅为13—16克左右。在陕晋黄土高原地区,小粒的黑豆是主要类型。在长江流域,由于大豆的用途多样化,因此大豆种粒的大小变化很大。在长江流域,由于自然条件较好,农业水平较高,大豆以有限结荚习性为主。在东北中北部大豆主产区,大豆主要为植株高大不倒伏、主茎发达而又有一定分枝的无限结荚习性及亚有限结荚习性。长江流域大豆蛋白质的含量显然较高,大都在45%以上。东北大豆主产区的大豆含油量较高(20—23%),但蛋白质的含量一般(37—40%)。中国各地区的大豆品种具有抗各种病害的...

我国地域辽阔,各地的自然条件,耕作栽培条件差异很大,对大豆的利用要求也十分不同,经过此等不同条件的长期选择,使我国的大豆品种资源丰富多彩,而且生态地理的分布规律也十分明显。在我国黑龙江省的北部,极早熟的中日性大豆方可适应,而在低纬度的广东地区,极迟熟的典型短日性品种,才是适应类型。这南北两地区之间的大豆,在生育期类型上,作连续性的过渡变化。在长江流域地区,于较长的无霜期期间,光照长短的变化较大,栽培制度复杂,因此大豆的生育期类型最为繁多,大豆的品种资源远较其它地区丰富。东北大豆主产区大豆的百粒重在18—22克左右,而东北西部干旱盐碱地区大豆的百粒重仅为13—16克左右。在陕晋黄土高原地区,小粒的黑豆是主要类型。在长江流域,由于大豆的用途多样化,因此大豆种粒的大小变化很大。在长江流域,由于自然条件较好,农业水平较高,大豆以有限结荚习性为主。在东北中北部大豆主产区,大豆主要为植株高大不倒伏、主茎发达而又有一定分枝的无限结荚习性及亚有限结荚习性。长江流域大豆蛋白质的含量显然较高,大都在45%以上。东北大豆主产区的大豆含油量较高(20—23%),但蛋白质的含量一般(37—40%)。中国各地区的大豆品种具有抗各种病害的遗传基因,但是生态地理分布规律不明显,抗病基因须经筛选才能发现。为了取得具有抗病基因的品种资源,既需要自疫区也需要自无病区搜集材料。东北大豆主产区是我国传统的商品大豆产区,因此大豆概为淡色脐黄豆。由于基因“T”既控制产生深色脐又控制产生棕毛,因此在东北大豆主产区由于强调种植淡色脐而将棕毛大豆几乎全部排除。在长江流域,大豆概为棕毛,脐色多褐至深褐色。

 
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