助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   characters 在 农作物 分类中 的翻译结果: 查询用时:0.204秒
图标索引 在分类学科中查询
所有学科
农作物
园艺
世界文学
中国文学
计算机软件及计算机应用
中国语言文字
蚕蜂与野生动物保护
美术书法雕塑与摄影
考古
更多类别查询

图标索引 历史查询
 

characters
相关语句
  性状
    Studies on Use of Biochemical Characters and Molecular Marker in Sugarcane Breeding
    生化性状和分子标记在甘蔗育种上的应用研究
短句来源
    Studies on Introduction and Domestication of Wild Artemisia Annua and Breeding Target Characters of High Artemisinin Content of Cultivar
    野生黄花蒿的引种驯化和高青蒿素含量栽培品种选育目标性状的研究
短句来源
    QTL Mapping of Soybean Agronomic Characters and Genetic Diversity Analysis of Soybean Cultivars from China and Japan
    大豆重要农艺性状的QTL定位及中国大豆与日本大豆的遗传多样性分析
短句来源
    Studies on Compositive Factors and Genetic Characters of Fiber Quality of Transgenic Insect-Resistant Hybrid Cotton
    转基因抗虫杂交棉纤维品质性状的构成因素和遗传特性的研究
短句来源
    The Mechanisms of Drought Resistance in Different Rice Varieties and Specific Expression of QTL for Related Agronomic Characters under Water Stress
    水稻不同品种抗旱机理和相关农艺性状QTL干旱特异表达研究
短句来源
更多       
  特性
    Study on the Propagating Characters and Seed Production Technology of Zoysia Japonica
    结缕草繁殖特性及其种子生产技术的研究
短句来源
    STUDIES ON SOME CHARACTERS OF WATER CONSUMPTION AND WATER USE EFFICIENCY ON SOME SOYBEAN VARIETIES
    几种大豆品种若干耗水特性和水分利用率的研究(英文)
短句来源
    STUDY ON THE PHOTOSYNTHETIC CHARACTERS OF THE HIGH PHOTOSYNTHETIC EFFICIENCY SOYBEAN STRAIN “HA No. 79-9440”
    高光效大豆品系“哈79-9440”的光合作用特性研究
短句来源
    An Investigation to the Main Characters and Grain Protein Content of Wheat Variety Resources in Henan Province
    河南省常用小麦品种资源主要特征特性和籽粒蛋白质含量的鉴定研究
短句来源
    STUDIES ON ECOLOGICAL CHARACTERS OF RAPE——Ⅱ.STUDIES ON ECOLOGICAL CHARACTERS OF DIFFERENT TYPE OF RAPESEED(B.NAPUS L)GROWTH AT DIFFERENT PLACES IN DIFFERENT SEASONS
    油菜生态特性的研究 Ⅱ.不同类型甘蓝型油菜(B.napus L.)异地异季种植的生态特性研究
短句来源
更多       
  性状的
    Studies on Introduction and Domestication of Wild Artemisia Annua and Breeding Target Characters of High Artemisinin Content of Cultivar
    野生黄花蒿的引种驯化和高青蒿素含量栽培品种选育目标性状的研究
短句来源
    QTL Mapping of Soybean Agronomic Characters and Genetic Diversity Analysis of Soybean Cultivars from China and Japan
    大豆重要农艺性状的QTL定位及中国大豆与日本大豆的遗传多样性分析
短句来源
    Studies on Compositive Factors and Genetic Characters of Fiber Quality of Transgenic Insect-Resistant Hybrid Cotton
    转基因抗虫杂交棉纤维品质性状的构成因素和遗传特性的研究
短句来源
    AN ESTIMATION OF HERITABILITY OF THE INDICATIVE CHARACTERS OF EARLINESS IN UPLAND COTTON
    陆地棉早熟性的指示性状的遗传力估计
短句来源
    HEREDITABILITY AND CORRELATION OF MAIN CHARACTERS OF Co~(60)-γ INDUCED VARIATION IN RICE
    Co~(60)-γ诱变水稻主要性状的遗传力和相关性的研究
短句来源
更多       
  “characters”译为未确定词的双语例句
    STUDIES ON MALE-STERLIE GENETICS CHARACTERS OF SPRING SOYBEAN S903B
    春大豆雄性不育系S903B的遗传特性研究
短句来源
    Study on Characters of the Male Sterile Offsprings of Transformation Wheat Assisted by Ion Beam
    离子束辅助遗传转化小麦后代雄性不育现象研究
短句来源
    Genetic Studies on Main Nutrient Quality Characters and Seed Dormancy in Maize (Zea Mays L.)
    普通玉米主要营养品质、种子休眠性的遗传研究
短句来源
    A STUDY ON THE PHOTOSYNTHETIC CHARACTERS OF DIFFERENT PLANT TYPES OF RICE
    不同株型水稻光合特性的研究
短句来源
    A STUDY ON SOME PHOTOSYNTHETIC CHARACTERS OF RICE
    水稻某些光合生理特性的研究
短句来源
更多       
查询“characters”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  characters
Soergel who has computed the characters of tilting modules.
      
Fork=1, we give explicit formulas for the characters.
      
We also present recursion relations satisfied by the characters and the monomial bases.
      
The canonical and dual canonical basis of the Fock space are computed and then used to derive the finite-dimensional tilting and irreducible characters for the Lie superalgebra osp(2|2n).
      
When one expands a Schur function in terms of the irreducible characters of the symplectic (or orthogonal) group, the coefficient of the trivial character is 0 unless the indexing partition has an appropriate form.
      
更多          


(The Kiangsu Affiliated Academy of the Chinese,Academy of Agricultural Sciences)Hybrid vigour in cotton has been reported by a number of workers.Most of them dealtwith interspecific hybrids.They were mostly marked with an increase in plant growth,especially in the F_1 crosses of American Upland × Sea-island and American Upland × Egyptiancotton.In order to study the possibility of producing an extra long fibre cotton in the Yang-tze basin and the Hwangho Plain by making use of hybrid vigour,the following problemswere...

(The Kiangsu Affiliated Academy of the Chinese,Academy of Agricultural Sciences)Hybrid vigour in cotton has been reported by a number of workers.Most of them dealtwith interspecific hybrids.They were mostly marked with an increase in plant growth,especially in the F_1 crosses of American Upland × Sea-island and American Upland × Egyptiancotton.In order to study the possibility of producing an extra long fibre cotton in the Yang-tze basin and the Hwangho Plain by making use of hybrid vigour,the following problemswere investigated at Nanking,Kiangsu during 1959-1962.(1)Combining ability between different interspecific crosses with special reference toyield,earliness and fibre qualities.(2)Morphological and physiological characters of economic importance in F_1 hybrids.(3)Performance of promising hybrids in field production.(4)Method of producing hybrid seeds with cheaper cost and less labour.Fifty-nine combinations were studied from 1960 to 1962,among which Pong-zai No.1(Upland cotton)×L.S.4923(Sea-island)was the best in yield and earliness.The averageyield of this F_1 hybrid in three years with 178 kg.of seed cotton or 53.7 kg.of lint cotton permow.As compared with the parents it was 94.35% of seed cotton or 82.2% of lint cotton ofthe yield of Delta-upland cotton and 187.17% of seed cotton or 172.74% of lint cotton of theyield of Sea-island L.S.4923.The fibre quality of F_1 hybrids approached Sea-island parent with a mean fibre length of40 m.m.,mean fibre fineness of 7000 meters per gram wt.,and single fibre strength of 4.5g.The methods and procedures for producing commercial hybrid cotton seed were as follows:(1)Hybrid F_0's seed was produced by hand emasculation and pollination which was ofvalue in areas abundant with hand-labor or adapted to transplanting for saving seeds up to4/5.(2)The female parent with recessive markers,was pollinated by hand without emascula-tion.In the thinning of the hybrid progeny all recessive plants were removed,leaving onlythe true F_1's.The recessive characters used for markers were virescent yellow foliage,redstem and hairy petiole of the seedling.The percentage of hybrid seed setting for differentupland cotton varieties ranged from 13% to 78%.Observations on heterosis in the characters of F_1 hybrids of G.hirsutum×G.barbadensewere summarized as follows:Plant Characters Comparison of bybrid with Upland and Seaisland parentsDays from planting to seedling Earlier than either parentDays from budding to flowering Intermediate nearer to earlier UplandDays from seedling to boll maturity Intermediate nearer to late Sea-island Days of bud development Intermediate nearer to earlier UplandDays of boll development Longer than Sea-islandDays from seedling to first boll maturity IntermediatePlant height Taller than either parentNumber of monopodia Less than either parent,but approaching Up landNumber of sympodia More than either parentNumber of fruiting points per plant More than either parentPosition of main stem nodes where first fruiting branch appears Lower than either parentInternode length of axis Longer than either parentInternode length of fruiting branch Longer than either parentPetiole length Longer than either parentLeaf area Larger than either parentLeaf lobe index Intermediate,approaching Sea-islandShedding percentage IntermediateDistribution of bolls in different parts of the plant Approaching Sea-island,most bolls setting at middle and upper parts of the plantWeight of seed cotton per boll IntermediateNumber of ovules per boll Approaching Sea-island in a lower numberMotes percentage More than either parentPistil length IntermediateCorolla area and index Larger than either parentSeed index Larger than either parentLint index IntermediateMaturity Intermediate,approaching late Sea-islandFibre length Longer than either parentFibre fineness Approaching Sea-islandYield in seed cotton Approaching Upland,higher than Sea-islandYield in lint cotton Lower than Upland,higher than Sea-islandProduction of dry matter More than either parentProduction of dry matter per square meter of leaf area More

1959—1962年试验证明,海陆杂种一代具有早熟、丰产、优质的特性。海陆杂种一代的籽棉产量接近陆地棉,而显著高于海岛棉。成熟期较海岛棉早,比陆地棉偏迟。生育特性一般介于两亲之间,不同程度的偏向于海岛棉,有的特性超过两亲范围以外。纤维细长,强度高,可以制成高挡纺织品。在江苏各地示范试种结果良好。在制种技术方面研究证明,采用具有某一隐性指示性状,进行不去雄杂交(人工辅助授粉),杂交率达70%,每工作日可制种6—8斤。

This paper deals with the genetic behaviour and breeding practice of the interspecific hybridsbetween G.hirsutum and G.arboreum obtained in 1944 and 1952.The main results are pre-sented as follows:1.The pollen grains of the Asiatic cotton germinate slowly on the stigma of the Uplandcotton.The growth of pollen tubes is slow and their female and male gametes are incom-patible at fertilization.Generally only a few ovules were fertilized within a boll.Owing tothe fact that the production of the nutritive substances...

This paper deals with the genetic behaviour and breeding practice of the interspecific hybridsbetween G.hirsutum and G.arboreum obtained in 1944 and 1952.The main results are pre-sented as follows:1.The pollen grains of the Asiatic cotton germinate slowly on the stigma of the Uplandcotton.The growth of pollen tubes is slow and their female and male gametes are incom-patible at fertilization.Generally only a few ovules were fertilized within a boll.Owing tothe fact that the production of the nutritive substances was inadequate to meet with the re-quirement of the normal development of the boll,it is difficult to obtain hybrids.In orderto promote the boll setting,pollinated maternal pollen grains ware applied on the stigmatawhich had been pollinated with paternal pollen grains several hours before.In this way,wegot the interspecific hybrids. 2.The interspecifie hybrids between these two species are physiologically abnormal.Thehybrids are highly sterile,either by selfing or by back crossing.The pollen grains of theUpland or Asiatic cotton may germinate on the stigma of the F_1 hybrids and the growing rateof their pollen tubes is also normal.Abnormality of the ovules may be the main cause forabortion.Most of the hybrid ovules have no embryo sacs.Occasionally a few ovules fertilized,but aborted during the development of embryoes.The chromosome number of the pollen mothercells of the F_1 hybrid,in general,is 39,or occasionally 52.The chromosome behaviour isirregular in meiosis,forming not only quartets,but also micronuclei.The percentage ofapparently well developed pollen grains is only 7.1% most of which are inviable too.The back-crosses either with the Upland or the Asiatic cotton as recurrent parent with F_1 hybrids aspollen parents are also with difficulty,because their pollen grains are highly abortive.3.The suitable concentration of sucrose in agar medium for artificial germination ofcotton pollen grains varies with cotton species:G.arboreum,34-35%,the Upland cotton,37-40%,and the Sea Island cotton,37-39%.4.By treating the mixed solution of 38% sucrose and a small amount of vitamin B1 onthe stigma of the F1 hybrid,the fertilization and development of the ovules may be promoted.The formation of the abcission layer of the stalk may be inhibited by the treatment of 5 p.p.m.2, 4-D linolin paste.By using the forementioned treatments,the fruiting percentage of theF_1 hybrids backcrossed with the Upland cotton rise up to 4.19%,even though there is only afew bolls with one mature seed,quite a number of them are seedless.Alternatively,by meansof repeated pollination,the fruiting percentage was 0.19%,and seeds are obtained.By usingG.arboreum L.as recurrent parent in backcrosses with the F_1 hybrids,the fruiting percentagerises up to 9.16%,but no seed has ever been obtained.5.For the purpose of improving the lint length and Ginning percentage,it is importantto choose the recurrent parent in the backcross with the F_1 hybrid.It may be ineffective forincreasing the number of backcrosses.6.The range of segregation of the lint length and ginning percentage of the backcrossprogeny,is wider in using F_1 hybrids as female parent than as males.Thus,it should beconcerned for selection of higher lint length and gining percentage.7.In the progeny of the interspecific hybrid of 1944 Combination,individual plants withgood economic characters were observed,such as lint length 41.3 mm.,ginning percentage 41.9%,hairiness,disease resistant,and early maturity,etc.By applying repeated selection of in-dividual plant,four desirable new strains were obtained:“Long Fibre No. 2,”“NankingCotton No.25,”“1003-7,”and “5161-2.”The characteristics of the “Long Fibre No.2”areearly maturity,long lint,single boll weight 5.28g.,fibre length 36 mm.,ginning percentage 31%,lint index 5.22g.,seed index 11.48g..The corresponding characters of the other varieties are:“Nanking Cotton No.25”:5.54g.,30-32 mm.,37-39%, 6.51g.,10.04g;“1003-7”:5.8g.,31,5mm.,38.6-39.18%,6.56g.,10.48g.;“5161-2”:5.20g.,30.31 mm.,39-39.7%,6.80g.,10.76g,respectively.

1.对陆地棉与中棉的杂种第一代和克服杂种第一代的不孕性进行研究,初步找出了不孕的原因和克服办法,为创造种间杂种,丰富育种材料,提供了可能。2.种间杂种遗传基础复杂,与具有优良性状多的陆地棉品种回交,获得许多超越亲本性状的新类型,可以选育出丰产、优质、抗病性强等的新品系。3.杂种第一代花粉母细胞染色体数,在同一花蕾上就有所不同,说明受精卵细胞在分裂的过程中已不正常,每一细胞的染色体数也不尽相同。

Heterosis and genetic variance component studies on 36 wheat crosses and 14 parentsrevealed that:1.Yield per plant,kernels per spike and kernel weight of F_1 hybrids showed a markedheterosis over mid-parental values by 20-30%.Plant height and date of heading ranked next,which averaged about 10% in magnitude,being negative in direction for heading date.Fertilespikelets per head manifested only a slight degree of heterosis.F_(1-)MP's for these characterswere highly significant as shown by t-tests.However,head...

Heterosis and genetic variance component studies on 36 wheat crosses and 14 parentsrevealed that:1.Yield per plant,kernels per spike and kernel weight of F_1 hybrids showed a markedheterosis over mid-parental values by 20-30%.Plant height and date of heading ranked next,which averaged about 10% in magnitude,being negative in direction for heading date.Fertilespikelets per head manifested only a slight degree of heterosis.F_(1-)MP's for these characterswere highly significant as shown by t-tests.However,head length,kernel weight per head andheads per plant showed,on the average,no heterosis.2.Variability of heterosis of these characters descended in the following order:yield perplant→heads per plant,fertile spikelets per head→kernel weight per head,kernel perhead→kernel weight→heading date→head length,plant height.3.Heritability estimates (in the broad sense) as analyzed from F_1 data were from highto low as follows:head length→plant height→kernel weight→kernel weight per head→kernel per head,fertile spikelets per head→heads per plant,yield per plant.4.Relative values of general comining ability (g.c.a.) from high to low were as follows:head length,fertile spikelets per plant→plant height,kernels per head→kernel weight perhead→kernel weight,heads per plant→yield per plant.For yield per plants,specific com-bining ability played an important role.5.There was a close relation between the general combining ability value and the cor-relation or regression coefficient of F_1 on m(?)d-parental values.The larger the g.c.a.value,the higher the correlation or regression coefficient,indicating that many characters of F_1 hybridswere determined to a certain extent by parental means.The r or b value became non-significantas the g.c.a.decreased below 40%.6.In predicting the breeding value of parents or hybrid combinations,actual performanceof F_1 hybrids should be emphasized first.The extent of heterosis might also be of value,sincea part of heterosis arisen from epistasis could be fixed in later generations.Mid-parentalvalues were of considerable importance.

本文通过优势和配合力的分析研究小麦亲本选配问题。试验表明:杂种第一代的一株粒重、一穗粒重、千粒重的优势最大,一般比两亲平均值大20—30%;其次为株高和抽穗期:其他穗部性状的优势很小或无显性。应用遗传变量成分分析法估算八个性状的配合力,在供试的亲本中,以穗长和结实小穗数的一般配合力为最大;株高、一穗粒数和一穗粒重次之;千粒重与一株穗数,一般配合力和特殊配合力所占的比重互有高低,因组合类型而异;一株粒重的一般配合力最小,它的特殊配合力占居主导地位。一般配合力大的性状,杂种与两亲平均值的相关或迴归系数也大。初步认为,在第一代对亲本或组合的评价,既要看杂种的实际表现,还要考虑它的优势,而以前者为主要依据;两亲平均值也有相当重要的意义。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关characters的内容
在知识搜索中查有关characters的内容
在数字搜索中查有关characters的内容
在概念知识元中查有关characters的内容
在学术趋势中查有关characters的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社