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原始亲本
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  “原始亲本”译为未确定词的双语例句
     Using the original varieties and opposite extremes as parents, two sets of six populations (P_1, P_2, F_1, F_2, B_1 and B_2) were developed for each parent set to detect gene dispersion and analyze the genetic model.
     分别利用原始亲本及极端品系作双亲,培育出由6个群体(P_1,P_2,F_1,F_2,B_1,B_2)组成的两套材料,用于基因分散的检测及遗传模型分析。
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     The production of F31-24 was 82% higher than that of Co-N-31. The results of TLC indicated that both F31-24 and Co-N-31 had spots at Rf = 0.50 and Rf = 0.26 with different contents.
     其效价比原始亲本Co-N-31提高了82%。 薄层层析结果表明,菌株F31-24和Co-N-31的发效产物在Rf值为0.50和0.26处均有斑点,但含量有异。
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     Studied on antigenicity of fusant strains,the results showed that after the grass carps which were immunized by fusanl strains infecting AM-lstrains,56-12-10 strains and three parental strains,their survival rates run to 64.9%, 68 % and 62.5%,valency of antibody upmost to 1:256 and 1:512 on the fourth week.
     对融合菌株进行抗原性研究,结果表明,受融合子菌株免疫保护的草鱼种注射56-12-10菌株、AM-1菌株及三原始亲本,其免疫保护率分别达64.9%、68.0%、62.5%,抗体效价最高达1:256和1:512。
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     It has been textually researched through the origin and development of mustard (Bra-ssica juncea) in China and the existence and distribution of wild mustard and its prime parent, the variance and dietribution of cultivated mustard and so on.
     从我国芥菜起源和发展的历史考证、野生芥菜及原始亲本种的存在与分布、栽培芥菜的变异与分布等方面,对中国的芥菜起源进行探讨,结果证明:中国是芥菜原生起源中心或起源中心之一;
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     The main results were summarized as follows:(1) Using degenerate primers within the HMG-box (high mobility group-box) , the Sox gene of the male and female allotetraploid fish and their original parents (red crucian carp and common carp) was amplified by PCR.
     (1)用特异于HMG-box(high mobility group-box)保守区的简并引物扩增了异源四倍体鲫鲤及其原始亲本(红鲫和鲤鱼)的Sox基因。
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  相似匹配句对
     ASSESSMENT OF ORIGINAL MATERIALS FOR CHOOSING OIL PALM PARENTS ON HAINAN ISLAND
     油棕选择亲本原始材料鉴定
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     f mutated by nitrous acid, the bio-activity of the bacterium T.
     f菌和原始T .
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     Study on Proteins of Allotetraploid Crucian-carp and Their Original Parents
     异源四倍体鲫鲤及其原始亲本的蛋白质研究
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     Original Sense of Jewelry
     首饰的原始意识
短句来源
     THE PARENTS OF SEQUOIA SEMPERVIRENS (TAXODIACEAE) BASED ON MORPHOLOGY
     从形态学看北美红杉的亲本
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  original parent
The change was clearly a consequence of tissue culture since six other plants regenerated from the same culture, and the original parent, did not carry the alteration.
      
Three of the S1 plants produced microspores which were from 4 to 20 times more tolerant to kanamycin than the original parent.
      
We have studied the effect of insulin on the activation of glycogen synthase in the G/K rat and in the original parent strain, the Wistar rat.
      
For the test, a sample of child-parent pairs is constructed by matching the original (parent) and the split-off (child) household information from the Second Malaysian Family Life Survey.
      
An original parent group of 72 Sprague-Dawley albino rats was subdivided into four treatment groups that were administered 5, 10, or 15 mg/kg diphenylhydantoin and distilled water on days 5 to 55 after birth.
      
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Fusarium wilt of cotton,caused by F.oxysporum f.vasinfectum(ATK.),had been found to cause a heavy loss of cotton crop in Kwan-Chung region re-cently.Symptoms appeared frequently on the cotyledons under the field conditions(20°-25℃).An incubation period of 10 to 20 days was observed.Severesymptoms were usually observed in the case of early infection,especially in thefour to five true leaf stages.It was found that the favorable infection occurred when the soil moisturewas above 60 to 75 per cent of its moisture-holding...

Fusarium wilt of cotton,caused by F.oxysporum f.vasinfectum(ATK.),had been found to cause a heavy loss of cotton crop in Kwan-Chung region re-cently.Symptoms appeared frequently on the cotyledons under the field conditions(20°-25℃).An incubation period of 10 to 20 days was observed.Severesymptoms were usually observed in the case of early infection,especially in thefour to five true leaf stages.It was found that the favorable infection occurred when the soil moisturewas above 60 to 75 per cent of its moisture-holding capacity and the soil tempera-tures were at 20-25℃.The infection was greatly reduced at soil tempera-ture 18°and 35℃.The treatment of cotton seeds with hot water at 55°-60℃ for30 minutes before dusting of seed with 0.5% PCNB mixed with ceresan re-sulted in a reduction of 76 to 69 per cent of seedling wilt.The use of additionalinorganic nitrogen and phosphate greatly increased the effect of seed treatments.The variety No.52-128(a selection from Delfose 531)in Kwan-Chung re-gion escaped the critical period of infection,thus an increase of 59.6% yield percent resulted.

棉花枯萎病在陕西关中,近几年由局部地区发展到点面发生,蔓延速度和面积已超过黄萎病。一般发病和死苗在30—50%,严重的棉田在90%以上。一些黄萎病区逐渐转为枯、黄萎混合发生区,枯黄萎同株型极为普遍。此病在棉花苗期即表现症状,潛育期为10—20天。1—2片真叶发病率达10—15%;5—6片真叶(蕾期)即会引起大量枯死和萎蔫。土壤致病温度平均在20°—25℃,维持10天以上,发病最烈;28℃以上病势减轻。土壤含水量在60—75%之间,枯萎病发病率最高。每年枯萎病发生消长与5、6月份的温、湿度及降雨量有一定关系。以4—6片真叶期,枯死植株发展较快,开花后期枯死率显著下降,到吐絮期尚有高峯出现。各品种间的枯死规律基本相同;仅有枯死程度上的差异。防治棉花枯萎病主要途径以抗病品种为主。由1956—1961年已鉴定出抗病品种(系)有52-128、鸭棚、147-Φ、57-50、南通二号、F96,F80等。其中确定能在病区生产应用的有52-128,鸭棚,平均降低发病率在30—70%,增产15—40%左右。并发现抗病免疫类型有中棉“嘉定硬子”。远缘杂交材料(353×G 1472)×芙蓉葵353 F_2可作杂交原始亲本...

棉花枯萎病在陕西关中,近几年由局部地区发展到点面发生,蔓延速度和面积已超过黄萎病。一般发病和死苗在30—50%,严重的棉田在90%以上。一些黄萎病区逐渐转为枯、黄萎混合发生区,枯黄萎同株型极为普遍。此病在棉花苗期即表现症状,潛育期为10—20天。1—2片真叶发病率达10—15%;5—6片真叶(蕾期)即会引起大量枯死和萎蔫。土壤致病温度平均在20°—25℃,维持10天以上,发病最烈;28℃以上病势减轻。土壤含水量在60—75%之间,枯萎病发病率最高。每年枯萎病发生消长与5、6月份的温、湿度及降雨量有一定关系。以4—6片真叶期,枯死植株发展较快,开花后期枯死率显著下降,到吐絮期尚有高峯出现。各品种间的枯死规律基本相同;仅有枯死程度上的差异。防治棉花枯萎病主要途径以抗病品种为主。由1956—1961年已鉴定出抗病品种(系)有52-128、鸭棚、147-Φ、57-50、南通二号、F96,F80等。其中确定能在病区生产应用的有52-128,鸭棚,平均降低发病率在30—70%,增产15—40%左右。并发现抗病免疫类型有中棉“嘉定硬子”。远缘杂交材料(353×G 1472)×芙蓉葵353 F_2可作杂交原始亲本材料。在病区增施氮、磷无机肥料,有降低苗期枯萎病的作用。轮作防病在关中采取二年小(?)、玉米轮作倒茬,发病率由原来的85%降低到38%,死苗率由50%下降到20%,有一定防病增产效果。

Investigations of chromosome number and some morphological variation in the progenies of autotriploid barley (Horedum vulgare L.) produced by crossing autotetraploid and diploid were carried out.The percentage of fertility of autotriploid was very low (2.57-4.33%). According to the observations made on the root-tips among 34 plants of autotriploid offsprings, their chromosome numbers consisted of 2n+ 1(52.94%), 2n + 2 ( 32.35% ) . 2n ( 11.77% ) .and 3n ( 2.94% ) . There was no plant with chromosome number over...

Investigations of chromosome number and some morphological variation in the progenies of autotriploid barley (Horedum vulgare L.) produced by crossing autotetraploid and diploid were carried out.The percentage of fertility of autotriploid was very low (2.57-4.33%). According to the observations made on the root-tips among 34 plants of autotriploid offsprings, their chromosome numbers consisted of 2n+ 1(52.94%), 2n + 2 ( 32.35% ) . 2n ( 11.77% ) .and 3n ( 2.94% ) . There was no plant with chromosome number over 2n+2, indicating that barley as a diploid species had a very narrow tolerance for extra chromosomes.Observations of chromosome behavior of PMC showed that triploid and aneuploid lagging chromosomes and microspores often contained a few micro-nuclei. Therefore, they were the causes of reduced fertility in triploids and aneuploids. The size of stomata and pollen grains was directly proportional to the ploid level.Plants of aneuploids had lower vigour and could be grouped into several types based on the morphological differences at the seedling stage. Some spike variations differing from their parents were observed, such as smooth-awn, neck-curled, loose-spike etc, all being recessive characters. Most of them were trisomics (2n+1). It may be possible that these variations have some relation to the presence of the extra chromosome.

本研究以二棱大麦的同源四倍体和二倍体杂交产生的同源三倍体为材料,对其后代染色体的数目及形态变异进行了鉴定和分析。同源三倍体自交结实率很低(2.57—4.35%)。据成活的34株幼苗的染色体鉴定结果,2n+1占52.94%,2n+2占32.33%,2n为11.77%。3n为2.94%。未发现多于16的非整倍体,说明二倍体大麦能容忍额外染色体的限度是很小的。 三倍体和非整倍体植株在减数分裂时,出现落后染色体和具有小核的四分体小孢子,导致结实率降低.叶片气孔大小和花粉粒直径与染色体倍数水平呈正比。 非整倍体植株生长矮小,根据苗期的形态差别可分成若干类型,并穗部出现与原始亲本不同的光芒、曲颈、疏松穗等隐性性状.其中以三体植株(2n+1)出现这些性状最多。这可能与三体具有额外染色体有关。

Interspecific protoplast fusion between virus infected species A.niger,a glucoamylase producer and virus free species A.oryzae were carried out.Two morphologically different types of hybrid were obtained from fusion product.HybridⅠ was found to be diploid by means of genetic and biochemical analysis.Hybrid Ⅱ produced no conidia and grew slowly.Detection of virus in hybrids and their progeny showed that the two hybrids and seven out of eight segregants including parental A.niger species conidia contained virus...

Interspecific protoplast fusion between virus infected species A.niger,a glucoamylase producer and virus free species A.oryzae were carried out.Two morphologically different types of hybrid were obtained from fusion product.HybridⅠ was found to be diploid by means of genetic and biochemical analysis.Hybrid Ⅱ produced no conidia and grew slowly.Detection of virus in hybrids and their progeny showed that the two hybrids and seven out of eight segregants including parental A.niger species conidia contained virus particles similar in morphology,serological properties,coat proteins and viral RNA to those found in the initially virus infected species,except one segregant and one isolate from heterokary on both of which produced parental A.oryzae conidia (bro,leu-).In this experiment,after fusion of cytoplasm and subsequent fusion of nuclei followed by haploidization during the pa-rasexual reproductive process,progeny producing A.oryzae condia remained virus free,although one of the parents and hybrids were virus infected.Such parental segregation indicated that virus transmission from virus-infected species to virus free species was not due to simple cytoplasmical inheritance,but was conditioned by a nuclear element.This element is recessive as evidenced by presence of virus in diploid hybrid.Although in Aspergilltts hybridization can be obtained following interspecific protoplast fusion within A.nidulans group or between A.nidulans group and A.fumagatus group,no data are so far available concerning virus transmission through interspecific hybridization.In this report,cross between A.niger (A.niger group) and a distantly related species A.oryzae (A.flavus group) are described,and the detection of virus transmission and comparison of glucoamylase product in parents,hybrids,and progeny are presented.

感染直径28-33纳米球形病毒的葡糖淀粉酶生产菌黑曲霉与无病毒生长较快的米曲霉通过原生质体融合杂交,获得两种形态不同的种间杂种。杂种Ⅰ经遗传及生化分析推测是二倍体,杂种Ⅱ不产孢子并生长较慢。两个杂种均感染了病毒,病毒形态、血清反应、衣壳多肽及核酸组份均与亲本黑曲霉的病毒相同。杂种诱发分离的后代中,多数包括亲代型黑曲霉分离子及其它分离子均感染了病毒,只有一个分离子和来自异核体的一个分离物例外,二者均产生亲代型米曲霉类型的孢子。这种亲代型分离表明病毒种间传递并非胞质遗传。 黑曲霉与米曲霉分属黑曲霉群及黄曲霉群,是曲霉属内亲缘关系远的种间杂交,迄今并无报道。杂种Ⅰ具有接近原始亲本的葡糖淀粉酶的产量及米曲毒的生长速度。

 
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