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育种实践
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  breeding practice
     In breeding practice,sterile line D64A had been bred with D64B.
     在育种实践中用D64B育成早熟不育系D64A。
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     In addition, breeding application ways of female parthenogenesis in dwarf and abortive wheat were analyzed and discussed from genetic theory and breeding practice.
     本文从遗传理论和育种实践的角度,对矮败小麦在孤雌生殖育种上的应用途径进行了分析和讨论.
     In the modern animal breeding practice, it's very important to improve breeding efficiency for sex linked, low heritability or late-expressive traits by Marker-assisted selection (MAS).
     在现代动物育种实践中,应用分子标记辅助选择(Marker-assisted selection,MAS)对低遗传力性状、伴性性状或表达较晚的性状进行选育具有非常重要的意义。
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     the maize variety can be evaluated objectively and comprehensively and the result was suitable to the probuction and breeding practice.
     其综合值能客观全面地评价参试玉米杂交种,结果基本符合生产和育种实践
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     Early generation stability is a special genetic phenomenon in rice breeding practice.
     水稻早世代稳定现象是水稻育种实践中出现的一种特殊遗传现象。
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  breeding practices
     The feasibility and reliability of the method in cross breeding practices were confirmed by the facts that 10 new wheat cultivars had been developed successfully.
     10个小麦新品种培育成功的事实 ,从育种实践的角度证明了这种方法的可行性和可靠性。
短句来源
     Several strategies in wheat breeding were summarized based on author's long-term breeding practices.
     笔者根据长期育种实践提出了小麦育种的若干策略。
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     The history,present situation and trends in development of theoretical researches and breeding practices for super high yield of rice are summarized in this paper.
     对水稻超高产育种理论研究与育种实践的发展历史、现状及发展趋势进行了综合评述。
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     Diallel analysis has been broadly used as an important tool of genetic analysis in classical quantitative genetics, which advanced the development of genetics studies and breeding practices.
     双列杂交分析是经典数量遗传学中应用最为广泛的一种重要的遗传分析方法,推动了遗传研究与育种实践的发展。
短句来源
     The breeding practices indicate that it is feasible to guide the breeding of new varieties through use of this theory and method.
     育种实践证明,这种理论与方法用于指导新品种选育是切实可行的。
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  “育种实践”译为未确定词的双语例句
     Molecular Breeding by Introducing Exogenous DNA into Wheat
     外源DNA导入小麦的分子育种实践
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     Xa21 gene from Oryzae longistaminata and Xa23 gene from Oryzae rufipogon are two excellent genes have wide resistant spectrum and having been put into practice.
     来自长药野生稻(Oryzae longistaminata)的Xa21基因和来自普通野生稻(Oryzae rufipogon)的Xa23基因是两个广谱高抗白叶枯病的优异基因,正被应用于育种实践
短句来源
     Some aspects about breeding and productive utilization of genetic resource in Asparagus bean are discussed.
     并从性状遗传与育种实践、遗传资源与生产利用两方面对长豇豆遗传资源的研究利用作了讨论。
     4. When proportion of breeding flock size is fixed, the population size enlarge every 5000, breeding profit and genetic gain will roughly increase 7.21% and 6.60% respectively, and breeding cost will decrease 22.97%.
     4.在育种群规模比例固定的情况下,群体规模每扩大5000只,育种效益平均增加7.21%,遗传进展平均增加6.60%。 育种投入平均减少22.97%,但单一加大群体规模,随着留种公羊数的增加,将降低育种效益和综合遗传进展,在育种实践中应尽量扩大育种群规模和主动育种群比例。
短句来源
     However, there are two opposite viewpoints on the genetic correlation of these two characters: One of those regards that the relations between them are in Linkage inheritance, the other does not.
     然而,在抗寒育种实践方面,对这两个性状的遗传关系有不同的看法,一种认为两性状呈连锁遗传关系,另一种则认为两性状不呈连锁遗传。
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  breeding practice
The results obtained are discussed in terms of the relationship between the genetic variation of longevity and developmental rate and prospects of their application to breeding practice.
      
The issues of potential practical application of imprinting in breeding practice are discussed.
      
The exhibition space of the cattle fair and the surveying eye of the cattle fair judge aim to recreate a laboratory space within the relatively "artisanal" and approximate context of the breeding practice.
      
Hybrid necrosis in wheat is a barrier to gene transfer in wheat breeding practice.
      
A set of 13 probes was established as core probes for subspecies differentiation and a pooled blotting analysis was carried out to facilitate the application of RFLP in rice genetics and breeding practice.
      
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  breeding practices
The impact of the present studies on plant breeding practices of self-pollinated crops are also dicussed.
      
This is most likely due to introgression of the modern cooking cultivars into the modern sake-brewing cultivars through breeding practices.
      
These results suggest that diversity in European wheat accessions is not randomly distributed but can be explained both by temporal and geographical variation trends linked to breeding practices and agriculture policies in different countries.
      
This genetic paucity is most likely the consequence of breeding practices employed by aquarists and commercial establishments.
      
During the standard agricultural breeding practices, the transgenic lines can be exposed to completely different conditions than those in the laboratory environment.
      
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To comply with a breeding project,data were collected on the growth and development of Harbin White pigs and their crossbreds.Herein are presented the developmental specifieities of this breed group and treatise made with regard to their general trend: 1.During the first post-partum year,the Harbin White pigs grew initially at a fast rate, followed by a slow growth rate,thus exhibiting the characteristic features of an early-maturing, easily-fattening type,capable of adipose deposition at a very early stage.Intensive...

To comply with a breeding project,data were collected on the growth and development of Harbin White pigs and their crossbreds.Herein are presented the developmental specifieities of this breed group and treatise made with regard to their general trend: 1.During the first post-partum year,the Harbin White pigs grew initially at a fast rate, followed by a slow growth rate,thus exhibiting the characteristic features of an early-maturing, easily-fattening type,capable of adipose deposition at a very early stage.Intensive grewth of lean meat also commenced at a relatively young age.On the ether hand,sacral vertebrae grew at a slow rate and hind-quarters were not as fully developed. 2.Among the various parts of the carcass,the loin grew with the greatest intensity, followed by the hind-quarters and shoulder-breast.Change in the composition of the carcass was reflected by a narrowing of the lean-fat ratio.Lean predominated at first,their ratio was 9:1.The ratio narrowed with increasing age,the proportion of fat increased while that of lean decreased.Under adequate feeding regime,the lean-fat ratio at 8 months of age was 1:1,however,under adverse feeding regime,it was only 1:0.6 at 12 months of age.The rela- tive percentages of mesentery and kidney fat to subcutaneous fat was 15:85. Among the various tissue components,fat grew at the greatest intensity and ascended from birth at a continuous rate,that of lean increased at an early stage,but declined after- wards.Skeletal growth was less intensive.The spinal column and pelvis grew at compara- tively faster rate.Along the spinal column,the lumbar vertebrae grew the fastest. 3.The digestive organs grew with the greatest intensity at the 1-4 month period.Their relative rates were large intestine,stomach and small intestines in a descending order.On the other hand,the small intestines showed a higher intensity at an earlier age than the stomach or large intestines. 4.Grewth intensity of tissues and organs during the first year of a pig’s life,when re- presented by growth curves may be classified under three categories:1)ascending order, such as fat,2)descending order,such as skeleton,3)parabolical order,such as digestive organs.The various tissues and organs were also characterized by specific periodism.The digestive organs grew more intensively during the nursing period,muscle grew at a faster rate at the 2-6-month stage.These periodic developmental features may be employed by swine breeders as bases to outline appropriate rearing programs.

围绕哈白猪育种工作,对哈白猪及其杂种进行生长发育试验。本文综合这些资料,探讨哈白猪的发育特点及猪的生长发育一般规律。1.哈白猪前期生长快,后期生长慢,表现早熟易肥小型猪的特点。其沉积脂肪能力很强,尤共早期更为突出;肌肉组织早期进入强度生长时期;荐椎发育较弱,后躯不够丰满。2.以腰部生长强度为最大,腿臀和肩胸次之。胴体组成的变化主要决定于肉、脂的变化。生后肌肉的此重占绝对优势,肉、脂此例约为9:1;随着年龄的增长脂肪此例增加,而肌肉比例减少。正常饲养条件下,哈白猪八个月龄肉、脂此例可达1:1,而低营养水平下十二个月龄仅达1:0.6。水油及板油与膘油的此例,一般保持在15:85左右。在各组织和器官中,脂肪的生长强度为最大,而且生后一直上升。肌肉的生长强度早期上升而后期下降。骨骼的生长强度较小,共中以脊椎和髋骨的生长强度较大。脊椎之中以腰椎生长强度为最大。3.消化器官以1—4个月龄生长强度为最大,其中大肠生长强度为最大,胃次之,小肠最小。但小肠出现生长强度最大时期较早,而胃和大肠较晚。4.猪由初生到一年各组织和器官的生长强度变化曲线可分为三种类型:1)一直上升者,如脂肪;2)一直下降者,如骨骼;3)上升到一定程度而...

围绕哈白猪育种工作,对哈白猪及其杂种进行生长发育试验。本文综合这些资料,探讨哈白猪的发育特点及猪的生长发育一般规律。1.哈白猪前期生长快,后期生长慢,表现早熟易肥小型猪的特点。其沉积脂肪能力很强,尤共早期更为突出;肌肉组织早期进入强度生长时期;荐椎发育较弱,后躯不够丰满。2.以腰部生长强度为最大,腿臀和肩胸次之。胴体组成的变化主要决定于肉、脂的变化。生后肌肉的此重占绝对优势,肉、脂此例约为9:1;随着年龄的增长脂肪此例增加,而肌肉比例减少。正常饲养条件下,哈白猪八个月龄肉、脂此例可达1:1,而低营养水平下十二个月龄仅达1:0.6。水油及板油与膘油的此例,一般保持在15:85左右。在各组织和器官中,脂肪的生长强度为最大,而且生后一直上升。肌肉的生长强度早期上升而后期下降。骨骼的生长强度较小,共中以脊椎和髋骨的生长强度较大。脊椎之中以腰椎生长强度为最大。3.消化器官以1—4个月龄生长强度为最大,其中大肠生长强度为最大,胃次之,小肠最小。但小肠出现生长强度最大时期较早,而胃和大肠较晚。4.猪由初生到一年各组织和器官的生长强度变化曲线可分为三种类型:1)一直上升者,如脂肪;2)一直下降者,如骨骼;3)上升到一定程度而又下降者,如消化器官。同时,各组织和器官具有某种程度的阶段性特征;如哺乳期消化器官生长强度较大;二——六个月肌肉生长强度较大。育种实践中应利用这些阶段发育特点制定相应的培育措施。

By studying ample results on corn breeding, the author put forth the following summary on the relation between the phenotypic expressions of the inbred lines and the heterosis of their F1 hybrids. To meet the need for analytical purpose, the inbred lines studied were classified as 5 plant-types, 3 ear-types and 5 tassel-types.1. There is greater possibility to obtain strong heterosis by using the inbred lines of different plant-types in the cross. This is especially true when the parental com-tinations are normal...

By studying ample results on corn breeding, the author put forth the following summary on the relation between the phenotypic expressions of the inbred lines and the heterosis of their F1 hybrids. To meet the need for analytical purpose, the inbred lines studied were classified as 5 plant-types, 3 ear-types and 5 tassel-types.1. There is greater possibility to obtain strong heterosis by using the inbred lines of different plant-types in the cross. This is especially true when the parental com-tinations are normal × cylindrical, normal × long-cylindrical, normal × pyramidal, normal × fan-shaped, cylindrical × fan-shaped and pyramidal × fan-shaped.2. There is greater possibility to obtain strong heterosis when the ear of both parents or one of them belongs to the I-types (husks much longer than the core).3. The possibility of obtaining strong heterosis is also greater by pairing the parents with tassels of medium development. This possibility is not found in crossing the parents with well developed tassels.4. It is rather earier to obtain strongly vigorous hybrid with increased number, weight and quality of kernels by crossing a parent of large or medium dent type with more rows per ear (16 or more) and more kernels per row with the other parent of half-dent or flint type with more rows per ear or more kernels per row.5. A strongly vigorous hybrid resistant to Helminthosporium leaf spots is only expedient when both parents are resistant, or by crossing a resistant parent with a less susceptable or little resistant parent.

本文依据玉米育种实践和亲本性状遗传规律的资料,从亲本自交系外部性状与杂种优势的关系上,进一步探讨如何有预见地组配强优势玉米杂交种的问题。研究结果表明,亲本的“株型”、“果穗类型”、“雄穗类型”、“果穗性状”和“抗大、小叶斑病性能”等主要性状,与杂种优势的大小有着一定的联系。根据亲本自交系的上述性状的差异,选择并合理搭配杂交组合,可以大大提高强优势杂交种出现的机率,从而提高了搭配杂交组合的预见性,减少了杂交育种工作中的盲目性。

Dans le processus de la vie,il existe toute une serie de contradictions,parmi lesquelles la contradiction entre 1'heredite et la variation est la principale et joue le role determinant dans 1'evolution de la nature vivante.Cette contradiction constitue 1'objet d'etude de la genetique,qui analyse les rapports re"ciproques entre les deux aspects contradictoires----1'heredite et la variation,recherche les conditions necessaires a leur conversion mutuelle,et s'occupe de 1'effec-tuer par des precedes appropries,afin...

Dans le processus de la vie,il existe toute une serie de contradictions,parmi lesquelles la contradiction entre 1'heredite et la variation est la principale et joue le role determinant dans 1'evolution de la nature vivante.Cette contradiction constitue 1'objet d'etude de la genetique,qui analyse les rapports re"ciproques entre les deux aspects contradictoires----1'heredite et la variation,recherche les conditions necessaires a leur conversion mutuelle,et s'occupe de 1'effec-tuer par des precedes appropries,afin d'obtenir d'excellentes varietes nouvelles.Un grand nombre de faits obtenus dans la pratique de l'epuration et durajeunis-sement des varietes,dans l'hybridation des plantes cultivees et dans la selection des ligne"es de plantes a anthe're sterile,prouvent indiscutablement que la contradiction entre 1'heredite et la variation est la loi fondamentale de la transformation et du developpement des etres vivants.

生物的生命过程中包含着许多矛盾,其中遗传与变异的矛盾是主要矛盾,在生物进化过程中起决定性作用。 遗传学就是以这个矛盾为其研究对象,它研究遗传与变异这两个矛盾方面的相互关系,探索两个矛盾方面互相转化所必需的条件,并通过适当的方法来实现这种转化过程,以达到获得优良新品种的目的。 品种提纯复壮、杂交育种及作物雄性不育系的选育等育种实践中的大量事实都充分说明,遗传与变异的矛盾是生物变化和发展的根本规律。

 
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