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群体育种
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  population breeding
     Research Advances and Strategic Development of Maize Population Breeding in Tangshan
     唐山玉米群体育种发展战略及研究进展
短句来源
     Based on the results of thirty years heterosis populations construction and elite hybrid breeding of maize, the empiristic and theoretic population breeding of maize was discussed.
     通过 3 0a来杂优群体构建、改良和完善以及杂交种选育的经验和成果对群体育种的理论进行了深入研究和探讨。
短句来源
     According to analyzing yield potential of soybean,the breeding guidance,breeding target,design of plant type,and breeding method of super soybean varieties were discussed. The concept of population breeding,varieties combined with the management techniques showed the highest yield potential,and suitable plant types were put forward. One of effective ways to breed super soybean varieties was put forward.
     从分析大豆的增产潜力,讨论了大豆超级种培育的指导思想、育种目标、株型设计与育种途径,提出了群体育种的思想和品种与充分发挥品种潜力的栽培技术融为一体的育种理念,并设计了理想株型,提出了培育半矮种品种,配以窄行密植栽培技术,是目前培育大豆超级种的有效途径之一。
短句来源
  colony breeding
     Rice Colony Breeding`s Theory and Practice
     水稻群体育种理论与实践
短句来源
     Rice colony breeding is use the rice which is sensitive to light temperature and karyon is no-breeding as genetic carrier,in virtue of it`s zoology no-breeding,building up mul-parent`s hybridized colony which is self-pollination.
     水稻群体育种是以光温敏核不育水稻为遗传载体,借助它的生态不育特性,建立多亲本天然授粉的杂交群体。
短句来源
     . to build a new hybridized colony. Use the colony breeding technology author has breed the rice named GB028S and Yanfeng-47that had examined and approved by liaoning province.
     作者利用群体育种技术已育成通过辽宁省审定的粳型水稻光敏核不育系GB028S和常规水稻品种盐丰47。
短句来源
  mass breeding
     But through researching its characteristics of often cross-pollinated and utilizing the method of super mass breeding there is a little hope of getting new varieties of super strong gluten wheat
     但是,利用了它这种常异交特性及大群体育种方法,为选育超强筋小麦新品种带来了希望。
短句来源
  “群体育种”译为未确定词的双语例句
     Preliminary Study on Macro-population Breeding of Wheat
     小麦大群体育种方法研究初报
短句来源
     A Study on Genetic Diversity and Breeding Value of a Series of Clonal Groups in Pinus tabulaeformis
     油松无性系群体育种值与遗传多样性研究
短句来源
     The Theoretical Evidence of Quantitative Genetics for Group Breeding Method of the Rice
     水稻群体育种法的数量遗传理论根据
短句来源
     It is expected that the inclusion of high quality and high yield in the breeding objective has some consequences on the design of progeny testing scheme in Nei Mongol Cashmere Goat (NMCG). The study was carried out on the utilization of the field data in Inner Mongolia White Cashmere Goat Breeding Form from 1997-2003. The breeding objective traits of NMCG were studied and determined by system analysis method based on the population parameters, biology coefficients and economic parameters.
     本文从内蒙古绒山羊育种的实际需要出发,在利用内蒙古白绒山羊种羊场1997-2003年的实测数据并获得群体育种学、生物学和经济学等参数基础上,利用系统分析法研究并确定了优质高产内蒙古绒山羊育种的目标性状;
短句来源
     The more loci selected and the higher breeding level of populations,the greater difference was found in breeding progress of the 3 selection systems.
     选择位点越多,群体育种水平越高,不同选择体制的育种进度差异越大。
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  population breeding
A number of methods of utilising the inter-varietal hybrids in multiple crosses and synthetic complexes is suggested as potential supplements to population breeding in this crop.
      
The results of phenotype selection were evaluated in the products of modified bulk-population breeding that was replicated across a range of rice ecosystems.
      
Polygyny was studied for 1 year in a great reed warbler population breeding in southern Germany.
      
The little auk population breeding in Thule District is the largest seabird population in northwest Greenland, as well as the largest known population of this species.
      
In the mid-nineties the German Wadden Sea island Mellum (53°N 43'E 08°09'E) harboured about 30% of the Herring Gull (Larus argentatus) population breeding along the German North Sea coast.
      
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  colony breeding
The common eider is a colony breeding seaduck with extreme female philopatry.
      
We studied nest-site and mate fidelity in renesting Common Terns (Sterna hirundo), from 1993 to 1997, in a Common Tern colony breeding on six small artificial islands in the harbour area in Wilhelmshaven (German North Sea coast).
      
  mass breeding
Facilities for the mass breeding of fly species are a prerequisite for evaluation of the biological efficacy of products to control fly species of hygienic importance and of subacute effects of chemicals in soils (exotoxicology).
      
Because of the costbenefit ratio, permanent mass breeding has to be abandoned in favour of "maintenance breeding with surplus" as defined byIglisch (1985).
      
For the development of ecotoxicological tests to evaluate subacute effects of chemicals in soils it is necessary to have facilities permitting a mass breeding of fly species such asN.
      
Mass breeding of cockroach species of hygienic importance is a prerequisite for the evaluation of the biological effectiveness of products and methods used to control cockroaches of hygienic importance.
      
The mass breeding is inspired from method that we established for the production ofMacrocentrus ancylivorusRoh.
      
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General (gca) and specific (sea) combining abilities for five yield and quality characters were estimated in a 6×4 incomplete diallel design in order to study the genetic behavior of new CP sugarcane varieties used as parental clones. The analysis of variance indicated that the gca effects of female clones were highly significant for all five characters studied, while sca effects of parental combinations were significant only for clump weight, stalk diameter and plant height. The ratios of gca and sca variance...

General (gca) and specific (sea) combining abilities for five yield and quality characters were estimated in a 6×4 incomplete diallel design in order to study the genetic behavior of new CP sugarcane varieties used as parental clones. The analysis of variance indicated that the gca effects of female clones were highly significant for all five characters studied, while sca effects of parental combinations were significant only for clump weight, stalk diameter and plant height. The ratios of gca and sca variance showed taht there were more additive than nonadditive genetic variance components found in the progeny population for these characters. The breeding potential of associated characters were evaluated prior to the new CP sugarcane varieties according to their combining ability effects. It was found that both CP 67-412 and CP 72-1210 were better female clones to tranfer high sugar and yield genes to their progenies, and the progenies of CP 65-357 as female parent also showed desirable stalk diameter and birx. Based on the breeding potential of F_1 population, the best combinations in this study were CP 72-1210× Ya 84-125, CP 72-1210× Ya 82-96, CP 67-412× Ya 71-374 and CP 65-357× Ya 71-370, which can be used in the future hybridizaton program of sugarcane.

为探讨新CP甘蔗品种作杂交亲本的遗传特点,采用6×4不完全双列杂交设计,估算5个产量和品质性状的一般配合力(gca)和特殊配合力(sca).方差分析表明,5个性状的母本gca极显著,而组合sca只有丛重,株高和茎径显著.V_(gca)∶V_(sca)表明,在后代群体性状表达上,加性遗传方差组分占有明显优势,根据配合力效应,侧重评价了新CP甘蔗品种的育种潜力,发现CP72—1210和CP67—412为母本易于将高糖高产基因传递给后代,CP65—357为母本的后代茎径和锤度也较理想,F_1群体育种潜力大的组合有CP72—1210×Ya84—125,CP72—1210×Ya82—96,CP67—×Ya71—374和CP65—357×Ya71—370,可用于今后的甘蔗有性杂交育种计划。

Beginning with an statement of existing problems in eucalyptus tree improvement in South China, this paper discusses some issues relating breeding strategies, breeding plans, hybrid utilization, seed production bases and clonal forestry in accordance with their biological characteristics. It is also pointed out that the success of genetic improvement program depends on the correct breeding strategies and a complete breeding plan. The major tasks of the tree breeders, therefore, are to enhance the management...

Beginning with an statement of existing problems in eucalyptus tree improvement in South China, this paper discusses some issues relating breeding strategies, breeding plans, hybrid utilization, seed production bases and clonal forestry in accordance with their biological characteristics. It is also pointed out that the success of genetic improvement program depends on the correct breeding strategies and a complete breeding plan. The major tasks of the tree breeders, therefore, are to enhance the management of genetic resources and to further complete and replenish the breeding population. Starting from the overall interests of the whole society, while expending the breeding population and improving the genetic character, the tree breeders must pay attention to supplying mass plantation with high quality planting stocks.

本文从我国桉属树种遗传改良工作存在问题着手,根据桉属的生物学特性,论述了育种策略、育种计划、杂种利用、种子生产基地、无性系林业等当前亟需解决的几个问题。强调遗传改良工作的成败取决于正确的育种策略和一个完整的育种计划。加强对基因资源的管理并进一步补充完善育种群体是育种工作者的主要工作领域。从整体出发,在不断扩大育种群体、提高遗传品质的同时,为生产提供更多、更好的种和苗。

This paper reports the natural doubling rate of green plants derived from rice anthers, and based on three agronomic traits (heading date, plant height and panicle length), the breeding utilization rate of regenerated green plants (H_1) derived from anther culture was estimated. The results showed that natural doubling rates of regenerated green plants derived from F_1 anther culture of reciprocal crosses of 84-11 and Xuan Er were 46% and 50%, respectively. For the above three traits, one-trait utilization rate...

This paper reports the natural doubling rate of green plants derived from rice anthers, and based on three agronomic traits (heading date, plant height and panicle length), the breeding utilization rate of regenerated green plants (H_1) derived from anther culture was estimated. The results showed that natural doubling rates of regenerated green plants derived from F_1 anther culture of reciprocal crosses of 84-11 and Xuan Er were 46% and 50%, respectively. For the above three traits, one-trait utilization rate of green plant from F_1anther culture was 29.27% ,29.88% and 42.86%, respectively, that of F_2 was 18.64%, 28.93% and 38.84%,respectively, and that of green plants derived from F_3 anther culture of the cross (8204/B407)were 81% ,72% and 88%, respectively. The synthetical utilization rate of the three traits was 3.75% for green plants from F_1 anther culture, 2.04% for F_2 and 50% for green plants from F_3 anther culture.

本文报道了水稻花药培养的绿苗自然加倍率,以抽穗期、株高、穗长三个农艺性状为指标,估算了花培再生绿苗(H_1)群体的育种利用率。结果表明:84-11和选二正反交F_1花药培养的绿苗自然加倍率分别为46%和50%。上述三个性状的育种利用率为:F_1花培绿苗分别为29.27%、29.88%和42.86%;F_2分别为18.64%、28.93%和38.84%;组合(8204/B407)F_3花培绿苗分别为81.00%、72.00%和88.00%。综合三个性状估算育种利用率结果是:花培绿苗率,F_1为3.75%;F_2为2.04%;F_3为50.00%。

 
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