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improved varieties     
相关语句
  良种
     A 608-accession core collection (including 548 landrace accessions and 60 improved varieties) from 5 rice cropping regions and 16 prefectures in Yunnan Province was evaluated in P-deficient (available P: 0.02 mg/kg) and P-sufficient (available P: 80 mg/kg) acid red soil.
     在土壤有效磷含量0.02mg/kg和80mg/kg条件下对云南5个稻作区和16个地州的548份云南地方稻核心种质和60份改良种进行了无效磷的活化特性及其生态差异研究。
短句来源
     Isozymes of peroxidase and esterase from Fuding Dabaicha(♀),Yunnan Dayecha(♂)and four improved varieties of 7-58 Fuyun F_1 generation which selected by Tea Research Institute of Fujian were analysed by polycrylamide gel electrophoresis.
     用聚丙烯酰胺凝胶垂直板电泳技术,对福建省农科院茶叶研究所选育的福云58型 F_1代茶4个良种福云6号、7号、8号、10号及其亲本福鼎大白茶(♀)、云南大叶种(♂)的过氧化物酶同工酶(POD)和酯酶同工酶(EST)进行分析研究。
短句来源
     With the interrupted development of new varieties,the effective use of the CP varieties as parents and the rapid extension of improved varieties such as Yuetang 63/237,“The Taitang 134 Age”,at which Taitang 134 was a predominant variety,has been over on the whole.
     新品种的不断育成,“新一代”CP 品种作亲本的有效利用,随着粤糖63—237等良种的迅速推广,“台糖134时代”已基本宣告结束。
短句来源
     Among the factor that contributed to the increase of maize yield, improved varieties account for132above 35% .
     在玉米增产的诸要素中,良种本身的作用要占35%以上.
     A total of 100 samples, including 81 landraces, 10 improved varieties and 9 low amylose mutants, were analyzed for proteins in rice endosperm by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS PAGE).
     本文报道了对云南省 10 0个水稻样品 ,其中包括 81个地方种、 10个改良种和 9个低直链淀粉含量突变体进行十二烷硫酸钠聚丙烯酰胺凝胶电泳 ( SDS- PAGE)分析的结果。
短句来源
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  优良品种
     Study on Improved Varieties Selection and Descendant Test for Hippophae rhamnoides ──Study on the Descendant Observation Test
     沙棘优良品种选育研究初报──子代观测试验研究
短句来源
     Authors' suggestions for improvement are selection of local improved varieties planting is used instead of afforestation of dibbling,afforestation in terrace preparation of soil, intercrop oiltea camellia and soya beans before canopy closure of oiltea camellia forest.
     建议从当地现有的优良品种中选育良种,用育苗造林取代点播造林,用梯级整地造林、割草抚育和摘果收获取代直接在坡地上点播造林和铲山抚育以及林地捡籽收获,油茶林尚未郁闭前间种豆类及其他改良土壤的作物。
短句来源
     According the evaluation of plant morphological index in field,this paper presented the maize improved varieties breeding development direction in mid-big spike,mid-big grain,mid-low stalk,mid-high density and moderate late maturity.
     依据田间植株形态指标评价,提出玉米优良品种育种中大穗、中大粒、中矮秆、中高密、中晚熟的发展方向。
短句来源
     Foui-stage Seed - producing Procedures summarized from the practical research for many years on the breeding of the improved varieties of crops can be used to keep the purification and quality of the improved varieties effectively.
     在多年农作物良种繁育实践中研究总结出的“四级种子生产程序”,能有效地保持优良品种纯度和种性。
短句来源
     Pacific oyster is one of improved varieties in shallow aquaculture with great body weight, good growth,delicious taste,high yield,and adaptability.
     太平洋牡蛎具有体型大、生长快、味美、产量高、适应性强等优点,是浅海养殖的优良品种之一。
短句来源
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  改良品种
     Dyeing Behaviors of C.I. Disperse Red 60 and Its Improved Varieties
     C.I.分散红60及其改良品种的染色性能
短句来源
     The ecological difference and activating characteristic of ineffective phosphorus of 608 accessions core collection (including 548 accessions landrace and 60 improved varieties) from 5 rice regions and 16 prefectures in Yunnan Province were evaluated when planted in P-deficient (effective P: 0.02 mg/kg) and P-sufficient (effective P: 80 mg/kg) acid red soil.
     以土壤有效磷含量0.02 mg/kg和80 mg/kg条件下对来自云南5个稻作区和16个地州的548份地方稻核心种质和60份改良品种盆栽,考察18个形态性状2种条件下的相对表型性状为基础,进行土壤无效磷活化特性鉴定及其生态差异研究。
短句来源
     disperse red 60 and its improved varieties (C.I.disperse red 127,146 and 191) on polyester fabrics were tested in weak acid dye bath.
     分散红 6 0及其改良品种 (C.I.分散红 12 7、146及 191)对涤纶织物的染色性能。 结果表明 :C.
短句来源
     Ai Bian 1”, a dominant dwarfing line which is very short in stature owing to the dwarfing gene Rht10 located on chromosome 4D, was crossed with modern improved varieties of wheat ( Triticum aestivum L.) with tall or medium stature.
     以 4 D染色体携带 Rht10而极度矮化的小麦显性矮秆系“矮变 1号”与中、高秆的现代小麦改良品种杂交 ,选育出了一批植株较矮变 1号显著提升、以至达到小麦育种理想株高的半显性衍生矮秆系 ,已将其应用于杂交小麦及小麦常规育种。
短句来源
     (3)selected hybrids and improved varieties as mutant materials would more possibly result in successful somatic selection at cell level.
     (3)选用杂种及改良品种作诱变材料可以提供较大的细胞水平上的选择性。
短句来源
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  选育品种
     4.At the level of D=6.54, all the 34 varieties were clustered into two major groups(groupI and groupII) , including landraces, improved varieties and foreign varieties respectively.
     4.甘薯品种的形态标记聚类分析:当第一等级D=6.54时34个品种分为两个类群(类群Ⅰ和类群Ⅱ),两个类群中都包含了地方品种、选育品种和外来品种。
短句来源
     Four isozymes including esterase (EST), malatedehydraogenase(Mal), phosphoglucose isomerase (Pgi) and aminiopeptidase (Amp) were used to analyze 462 rice improved varieties.
     利用酯酶、苹果酸酶、氨肽酶、磷酸葡萄糖异构酶四种等位酶对462份水稻选育品种进行分析。
短句来源
     Thirty six SSR (simple sequence repeats) loci distributed at 12 chromosomes evenly were used to analyze 520 rice improved varieties.
     利用平均分布于12条染色体的36对SSR引物对我国水稻选育品种的520份水稻选育品种进行分析。
短句来源
     Seven hundred and forty four Chinese rice improved varieties with different ecotypes bred in 1931-1998 were selected to detect the genetic diversity by 12 allele loci of five allozymes and analyze the correlation between allozyme distance and morphological traits distance.
     选取源自我国 2 6个省 (自治区、直辖市 )不同选育时期、不同类型的 74 4份栽培稻选育品种为试验材料 ,应用 5种等位酶 12个等位基因位点分析我国栽培稻选育品种的遗传多样性 ,并研究等位酶和形态学性状在多样性研究中的相关性。
短句来源

 

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      improved varieties
    A case study in Chiapas suggests that the adoption of some improved varieties has enhanced genetic diversity in maize, but one improved type competes with landraces in the most favorable land.
          
    Improved varieties of legumes adapted to nutrient deficiency have the potential to improve food security for the poorest farmers.
          
    Rice production doubled between 1966 and 1990 due to large scale adoption of these improved varieties.
          
    There was a complementation not rivalry between farmer varieties (FVs) and improved varieties (IVs).
          
    The study describes the genetic variation in space, assesses the association of maize diversity with spatial and environmental descriptors and quantitative traits, and provides a test of the impact of improved varieties.
          
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    Among collections chiefly from North China,different races of Pucciniaglumarum were identified by means of differential hosts used by Gassner & Straibor a set of improved varieties of wheat grown in China. Among 14 improved varieties,marked differences in resistance to stripe rustwere observed.Li-Yung I was resistant to 40 out of 50 collections of striperust,with unstable reactions to 7 collections; Nanking 4197 was resistant to 37 ??collections with unstable reactions to 9 collections; while Yechao...

    Among collections chiefly from North China,different races of Pucciniaglumarum were identified by means of differential hosts used by Gassner & Straibor a set of improved varieties of wheat grown in China. Among 14 improved varieties,marked differences in resistance to stripe rustwere observed.Li-Yung I was resistant to 40 out of 50 collections of striperust,with unstable reactions to 7 collections; Nanking 4197 was resistant to 37 ??collections with unstable reactions to 9 collections; while Yechao 35368 and Ye-Ta 1885 were susceptible to all except 5 collections from FJymus ckinense.Theinstability of varietal reactions is one of the principal obstacles in identification.As a consequence,tests with 6 improved varieties including Early Premium,Pi-Ma 1,etc.,only 21 out of 50 stripe rust collections could be differentiated into10 distinctly different races (Y 1 to Y10).However,there were great differencesin pathogenicity among different races so far identified.All the 6 improvedvarieties were resistant to race Y 1 and susceptible to race Y 2.The virulenceof other races differed from one another also pronouncedly. Races Y2,Y3,Y4,Y5 ,Y6,Y7 ,and Y8 were collected from wheat; Y 9 andY10 from Agropyron spp.; and Y1 was collected mainly from Elymus chinense(including 1 collection from wheat).Races Y 1,Y 3.Y 4,Y 5,Y 7,Y 8,Y 9,Y 10were found in Hopeh; Y 1,Y 2,Y 6,Y 7 in Shansi; and Y 6 in Shantung. All collections could be readily grouped into 16 different forms if the highestreaction type was taken as a basis for identification (this method of groupingwas adopted by Fang et al).Comparing the results with that of Fang et al,itappeared that reactions of certain varieties,such as Early Premium,Li-Yung 1 tocollections from North China were distinctly different from their reactions tocollections from East China.This suggested strongly that races of stripe rustorganism between these two regions might be quite different. All wheat varieties tested were found to be resistant to stripe rust collectionsfrom Elymus chinense.whereas collections from Elymus sibiricus and Agropyronspp.were capable of attacking many wheat varieties. Single spore infection of stripe rust frequently resulted in sporulation on thewhole leaf blade.This is definitely much more systemic than infections of eitherstem rust or leaf rust organism.Inoculations with single uredospores and mono-uredospore lines often produced mixtures of infection types ranging from resistantto susceptible on same leaf blades.This is analogous to "X" type reactions re-ported in stem rust and leaf rust literature; therefore,"X" type reaction shouldalso be recognized in the study of stripe rust.

    1950年以来自华北以及少数其他地区搜集的条銹菌种,不論在Gassner和Straib所用的鑒定寄主或在国內推广品种上鑒定,都可区分出許多不同的类型。所用14个推广品种对于这些条绣菌种的抗病性有着很大的差別;其中以驪英1号最抗病,对50个菌种中的40个菌种是抵抗的,对7个菌种反应不稳定;金大4197次之,对37个菌种是抵抗的,9个菌种反映不稳定;燕交35368及燕大1885除了对5个碱草(Elymus chin-ense)条銹菌种抵抗外,对其他所有菌种的反应都是感染型。品种反应的不稳定,是鑒定工作中的主要困难。加根据早洋麦、农大3号、碧螞1号、碧螞4号、驪英3号、玉皮麦等6个品种的稳定反应加以分析,仅能將50个菌种中的21个区分成10个显著不同的类型。这6个品种对第一类型均为抵抗,对第二类型均为感染,其他类型的致病力介于二者之間。在这10个类型中,类型Y_2,Y_3,Y_4,Y_5,Y_6,Y_7,Y_8采自小麦;类型Y_9,Y_(10)采自Agropyron spp.;类型Y_1主要采自Elymuschinense(包括一个小麦菌种)。河北出現的类型有Y_1,Y_3,Y_4,Y_5,Y_7,Y_8,Y_9,...

    1950年以来自华北以及少数其他地区搜集的条銹菌种,不論在Gassner和Straib所用的鑒定寄主或在国內推广品种上鑒定,都可区分出許多不同的类型。所用14个推广品种对于这些条绣菌种的抗病性有着很大的差別;其中以驪英1号最抗病,对50个菌种中的40个菌种是抵抗的,对7个菌种反应不稳定;金大4197次之,对37个菌种是抵抗的,9个菌种反映不稳定;燕交35368及燕大1885除了对5个碱草(Elymus chin-ense)条銹菌种抵抗外,对其他所有菌种的反应都是感染型。品种反应的不稳定,是鑒定工作中的主要困难。加根据早洋麦、农大3号、碧螞1号、碧螞4号、驪英3号、玉皮麦等6个品种的稳定反应加以分析,仅能將50个菌种中的21个区分成10个显著不同的类型。这6个品种对第一类型均为抵抗,对第二类型均为感染,其他类型的致病力介于二者之間。在这10个类型中,类型Y_2,Y_3,Y_4,Y_5,Y_6,Y_7,Y_8采自小麦;类型Y_9,Y_(10)采自Agropyron spp.;类型Y_1主要采自Elymuschinense(包括一个小麦菌种)。河北出現的类型有Y_1,Y_3,Y_4,Y_5,Y_7,Y_8,Y_9,Y_(10);山西出現有类型Y_1,Y_2,Y_6,Y_7;山东出現有类型Y_6。品种不稳定反应除通过选擇反应較为稳定的品种来克服外,同时还須严格掌握温室条件。如以品种的最高反应为标准(如方中达、陈迺用所采用),則可將上面50个菌种分成16个不同的类型。与华东的結果比較,許多品种如早洋麦、驪英1号等对兩个地区条銹病菌的反应适相反,表明华东和华北条锈菌的致病力可能有很大的差別。Elymus chinense的条銹菌与小麦条绣菌的致病力有極大差异,所测定的小麦品种对前者均抵抗。Elymus sibiricus和Agropyron spp.的条绣菌則能正常侵染多种小麦品种的幼苗。条銹菌在小麦叶片內能适当的扩展,較秆銹菌和叶銹菌更有系統性,單孢子接种約在二星期左右可蔓延到整个叶片。同一叶片上常出現抗病和感病的反应,用單孢及單孢菌系接种,得出同样結果。条绣菌的鑒定标准中除了原有的反应型外,还应加入混合型“X”一項。

    Occurrence of Ustilago tritici on the improved varieties of spring wheat is a serions problem in Manchuria.The use of modified hot-water treatment in the early spring is more or less limited on account of the enormous quantity of seeds and the short period of sowing time.For this purpose,the hot-water treatment of the seeds in the fall and to store over the winter after being perfectly dried is suggested. Experments are held in the laboratory and greenhouse,as well as in the field. The treated and untreated...

    Occurrence of Ustilago tritici on the improved varieties of spring wheat is a serions problem in Manchuria.The use of modified hot-water treatment in the early spring is more or less limited on account of the enormous quantity of seeds and the short period of sowing time.For this purpose,the hot-water treatment of the seeds in the fall and to store over the winter after being perfectly dried is suggested. Experments are held in the laboratory and greenhouse,as well as in the field. The treated and untreated seeds are stored under various environmental conditions at different periods of longevity.A final measurement between treated and un- treated seeds is made. The results obtained from 1953 to 1955 indicate as follows:Generally,under normal dry conditions of more than five months' storage,there is no difference between treated and untreated seeds in the percentages of germination,rates of emergence,heights and dry weights of seedlings,and yields.However,under conditions of high relative humidity,the treated seeds would be deteriorated in the same manner as the untreated ones.Although the results point out that the treated seeds tend to delay the emergence of seedlings from soil,yet,it does not influence the later growth of the wheat plants.Varietal difference between the treatments in the experiments is insignificant. The tentative results lead to a conclusion that the seeds of spring wheat varieties to be treated in the fall and stored in the winter may have a practi- cal value in Manchuria.

    1.经二年的试验证明,小麦种子经冷水温汤浸种后,充分干燥,在普通干燥室内贮藏达5个月以上,其发芽、出土、苗期生长及最终产量均不受影响。2.在潮湿情况下贮藏,种子的出土率即迅速降低。但温汤浸种后的种子对湿度的感应与一般种子无异。3.参加试验的三个东北地区小麦推广良种对于浸种与贮藏关系上所表现的反应一致。4.贮藏对温汤浸种的防病效果无影响。

    The wide occurrence of Elymus chinense heavily infected with Puccinia glumarum, was found around wheat fields in central part of Shensi Province. It was proved experimentally that the stripe rust on E. chinense differed greatly from that on wheat in pathogenicity as well as in uredospore Mearurement, and the former was identified as a biological race of P. glumarum (race YIE). E. chinense was resistant to 14 stripe rust collections from wheat while 13 improved varieties of wheat were resistant to 5 stripe...

    The wide occurrence of Elymus chinense heavily infected with Puccinia glumarum, was found around wheat fields in central part of Shensi Province. It was proved experimentally that the stripe rust on E. chinense differed greatly from that on wheat in pathogenicity as well as in uredospore Mearurement, and the former was identified as a biological race of P. glumarum (race YIE). E. chinense was resistant to 14 stripe rust collections from wheat while 13 improved varieties of wheat were resistant to 5 stripe rust collections from E. chinense. Field observations also verified that infections of wheat due to uredospores of race YlE all developed highly resistant infection types with only, scanty sporulatiou. Successive incculation starting with large amount of uredospores showed that race YlE could not perpetuate on wheat beyond 5 uredospore generations. Different wheat species of wide genetic diversity were either immune or highly resistant to race YlE. Stripe rust from wheat could attack different species of grasses, among which Bromus teciorum and E. sibiricus were highly susceptible. Race YlE could tolerate much higher temperature than races collected from wheat varieties and prolific sporulation was obtained at 25℃. Stripe rust from E. sibiricus and Agropyron spp. severely attacked seedlings of many wheat varieties. The practical importance of these grasses to the perpetuation of these biological races of stripe rust needs further study.

    山西晉中一带麦田边生有大量碱草(Elymus chinense),严重感染条锈病。接种試驗証明小麦条銹菌与碱草条銹菌在致病力方面有显著差异。碱草对14个小麦条銹菌种均抵抗,碱草条銹菌虽能侵染小麦,但13个小麦推广品种对所有5个碱草菌种都表現抵抗。田間調查結果亦示明碱草条銹菌虽能侵染小麦,但麦叶仅产生抗性的枯斑及形成极少量的夏孢子堆,并証实其不能在小麦上继續繁殖。不同小麦的种对碱草条锈菌亦均免疫或高度抵抗。小麦条銹菌能侵染冰草(Agropyron cristatum)等11种禾草,其中旱雀麦(Bromus tectorum)及西伯利亚碱草,(Elymus sibiricus)高度感染。碱草条銹菌較小麦条銹菌能适应更高的气温,在25℃仍能正常侵染碱草且产生大量孢子堆,其夏孢子(28.94μ×22.41μ)亦显著較小麦条銹菌的夏孢子(26.10 μ×19.48μ)为大,因此是条銹菌(Puccinia glumarum)的一个較为特殊的生理小种(YIE)。西伯利亚碱草(Elymus sibiricus)、山大麦及麦穗草(Agropyron spp.)的条銹菌均能正常侵染小麦,但尚未发現其大量感染条銹病的羣落。

     
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