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sterile
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  不育
    Identifying on Photo-thermo Sensitive Genic Male Sterile Lines in Rice and Study on Xa21 Transgenic Progeny of Peiai64S
    水稻光温敏核不育系鉴定及培矮64S转Xa21基因后代分析
短句来源
    Fertility Expression and Stability of the Photo- and Thermo-sensitive Genic Male Sterile Rice Pei'ai 64S under Controlled Low Temperature Conditions
    光温敏核不育水稻培矮64S低温下育性表达及其稳定性研究
短句来源
    Basic Studies on the Inverse Temperature-sensitive Dual-purpose Genic Male Sterile Line Go543s
    水稻反温敏两用核不育系go543s的应用基础研究
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    Study on Molecular Cytogenetics of Nian Type CMS and Development of Its the New Sterile System by Substituting Fertility Gene Carrier in Wheat
    粘类小麦CMS分子细胞遗传学研究及其育性基因载体替换后新不育体系的建拓
短句来源
    Basic Studies on the Dual-purpose Genic Male Sterile Rice C815S and Its Homologous Plant Lines
    水稻两用核不育系C815S及其同源株系的应用基础研究
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  不育的
    Preliminary study on inheritance of Brassica juncea thermosensitive genicmale sterile line 'K121S'
    油菜K121S温敏核不育的遗传初探
短句来源
    1. Pollen abortion is an indicator for identifying the male sterile plants. Pollen fertilityof F1 plants from five different crosses, including 167×YB, YA×167, YA×Y12R, ZD8319×ZB, and ZA×ZD8319 were examined. All of the F1 pollen is semi-sterile, which providedevidence that the traits of male sterility in these lines are controlled by a single-genicgametophytic-type system.
    1.以花粉败育率作为衡量大豆细胞质雄性不育植株育性的指标,组配了(167×YB)、(YA×167)、(YA×Y12R)、(ZD8319×ZB)和(ZA×ZD8319)五个杂交组合,通过 F1 育性检查,所有 F1 花粉均表现为半不育,这一现象是单基因配子体不育的典型特征。
短句来源
    The emerged spike-lets rate of Pei'ai64S is about 63.3% when its male is sterile.
    培矮64S处于不育的状况时穗粒外露率仅为63.3%,其不育状况的植株外部形态与V20A大体相同,要采取措施提高其穗粒外露率;
短句来源
    Based on the cross between bred three CMS sterilers of upland cotton 98-38S, 8933S, T458S were bred by selecting sterile plants and backcrossing multi-generation.
    远缘杂种后代中发现了育性分离现象,通过选择不育株经多代回交转育,育成了三个不育性稳定且完全不育的陆地棉细胞质雄性不育系:98-38S,8933S、T458S;
短句来源
    When 77(2)—1 used as female plant was crossed with T. spherococcurn,F_1 plants ap- peared to be low sterile,but F_2 plants were segregated in proportion to 3:1 with respect to fertile and male sterile.
    当以77(2)—1做母本与印度矮生杂交时 F_1代表现为低不育,F_2代的育性发生分离,可育与不育的比例呈3:1。
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    Studies on IEF/SDS-PAGE and its application to the analysis of the proteins related to fertillity of photo-and thermo-sensitive genic male sterile rice(Oryza sativa L.)
    IEF/SDS-PAGE技术及其在光温敏雄性不育水稻育性相关蛋白分析中的应用研究
短句来源
    Study on Biology of Cytoplasmic Male Sterile Line GDS in Maize(Zea Mays L.)
    玉米(Zea mays L.)GDS细胞质雄性不育系生物学研究
短句来源
    The Research on the Fertile Change Mechanism of Wheat Photoperiod Sensitive Male Sterile Line(A31)and Molecular Marker of Photoperiod-sensitive Gene
    光周期敏感小麦雄性不育系A31育性转换机制研究及光敏基因分子标记
短句来源
    Genetic Study on Jin A Cytoplasmic Male Sterile Line in Cotton (Gossypium)
    棉花晋A细胞质雄性不育系的遗传研究
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
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  sterile
Fine mapping of an Arabidopsis thaliana male sterile mutant EC2-157
      
An Arabidopsis thaliana male sterile mutant EC2-157 has been isolated using an EMS mutagenesis strategy.
      
As no male sterile genes have been reported in this region, ms157 could be a novel gene related to fertility.
      
Physicochemical Properties of Melanins Produced by the Sterile Form of Inonotus obliquus("Chagi") in Natural and Cultivated Fung
      
Physicochemical properties of pigments isolated from the naturally occurring sterile form of Inonotus obliquus(Fr.) Pil.
      
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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。

From 1957 to 1960,colchicine aqueous solution has been used for doubling the number ofchromosomes in wheat-rye F_1 hybrids.The concentrations of colchicine used for treatmentwere 0.04% and 0.05%.Hybrid seedlings were exposed in colchicine solution for 4 days inroom temperature not over 15℃.After the treatment,the seedlings were transplanted ingreenhouse where a condition of high humidity and comparatively low temperature (usuallybelow 10℃) was maintained until the seedlings had recovered from colchicine poisoning.Themain...

From 1957 to 1960,colchicine aqueous solution has been used for doubling the number ofchromosomes in wheat-rye F_1 hybrids.The concentrations of colchicine used for treatmentwere 0.04% and 0.05%.Hybrid seedlings were exposed in colchicine solution for 4 days inroom temperature not over 15℃.After the treatment,the seedlings were transplanted ingreenhouse where a condition of high humidity and comparatively low temperature (usuallybelow 10℃) was maintained until the seedlings had recovered from colchicine poisoning.Themain results are summarized as follows:1.A total of 4210 wheat-rye F_1 hybrid seedlings were treated with colchicine and 2599or 61.7% of the treated seedlings had recovered from the treatment.2.Among the recovered seedlings,about 40.8% of the sterile F_1 hybrid plants were turnedto be partial fertile and various amount of seeds were obtained from these successful plants.3.Whither the hybrid seedlings were vegetatively propagated by separating the tillersor not,no difference in percentage of successful plants has been observed.However,theseedlings which have been slightly wounded on crown part by a sharp razor blade before treat- ment,resulted in 8.8% more successful plants than those not wounded.4.In successful plants,an average of 30% of spikes would be partial fertile and setvarius amount of seeds.In other words,an average of 30% of the spikes that came from theaxile buds which have been exposed directly to colchicine treatment,would become sectorialchimera of polyhaploid and amphidiploid.The tillers that came from the directly exposedaxile buds are called primary tillers.5.The tillers that came from the axile buds of the primary tillers are called secondarytillers.According to the analysis of the data,it has been shown that the secondary tillerusually begin at the eighth tiller of an individual plant.Compared with the primary tillers,only 10% of the secondary tillers,as calculated from the data,would show sectorial chimeraon spikes and set various amount of seeds.6.The chimera spikes would produce 7 grains per spike in average.In an individualplant,the fewer the number of chimera spikes,the less the number of grains could be pro-duced by each chimera spike.In the case of only one chimera spike per plant,only 4.5 grainsin average per changed spike could be obtained.While there was 6 changed spikes per plant,the number of grains per chimera spike would increase to 22.4.7.If the average number of primary tillers of the recovered plants could be increasedto 6 or 7 per plant by some proper measures at tillering stage,it has been estimated that inaddition to the usual rate of successful plants,at least 15% more could be obtained.8.After analysis of the data,it has been clearly shown that the axile buds which havebeen effected by treatment would have a less chance to grow into tillers than those which havenot been effected.If we could find some proper measures to eliminate such a difference intillering,then,by estimation,the percentage of successful plants could be increased to morethan 80%.This is an interesting problem to be studied concerning the efficiency of colchicinetechnique.9.A total of 712 lines of Triticales have been thus produced by doubling the number ofchromosomes in wheat-rye F_1 hybrids with colchicine treatment at tillering stage.

自1957年到1960年曾三次用秋水仙精处理小麦——黑麦杂种第一代的分蘖苗,获得小黑麦品系712个。秋水仙精用0.05%及0.04%水溶液,处理时间四天。在处理后的成活植株中,处理成功的植株,三次总平均占40.8%。根据资料分析的结果,由直接受到处理影响的腋芽所长成的一次分蘖有30%的成功率,而由一次分蘖上所长出来的未直接受到处理影响的二次分蘖则只有10%的成功率。如能促使处理后恢复的植株尽可能多地产生一次分蘖,使每一单株都具有6—7个以上穗子,这样,以株为单位的处理成功率估计至少还能增加15%。

The results obtained from the experiments on the leaf-color shift in relation to the forma-tion of high yield of wheat in Nanking during 1961 and 1962 are summarized as follows:1.The leaf-color shift of wheat plant is an inherited biological character.The highyield is closely connected with these rhythmic shifts.The appearance of “green-yellow-green”at the early spring,shooting,and booting stages is determined by the fluctuation of thechlorophyll content and the level of nitrogen of the leaves.2.On account of...

The results obtained from the experiments on the leaf-color shift in relation to the forma-tion of high yield of wheat in Nanking during 1961 and 1962 are summarized as follows:1.The leaf-color shift of wheat plant is an inherited biological character.The highyield is closely connected with these rhythmic shifts.The appearance of “green-yellow-green”at the early spring,shooting,and booting stages is determined by the fluctuation of thechlorophyll content and the level of nitrogen of the leaves.2.On account of the 7-9th leaves of high-yielding plant having Comparatively large areaand high dry matter,the accumulation of dry matter in the internodes and leaf sheathes atthe basal part of the plant is promoted,whereby the formation of stiff culm is favored.Under the conditions of high-yielding cultural practices,a higher level of nitrogen of theplant body stimulates the differentiation of spikelets and florets.3.Under high-yielding cultural conditions,the normal shift to green color of the leaves atthe booting stage promotes the translocation of stored matter from vegetative organs to thekernels and favors the process of grain filling.The number of spikelets per head,the grainweight and the yield are consequently increased,while the number of sterile florets is loweredsignificantly.4.A proper lay-out of fertilizer practices is necessary for controlling leaf color shift andgetting a high yield.According to the results of our experiments,a moderate amount ofbasic fertilizers benefits the growing of Well-developed seedlings,while a heavy applicationof farmyard manure at the early winter increases the accumulation of the soil nutrients andtherefore favores the formation of strong tillers and large spikes.The shooting fertilizershould be applied when the green color fades away at shooting stage.The amount offertilizers applied depends upon the degree of leaf color.This application of fertilizers pro-motes the growth of the last three leaves,accelerates the translocation of nutrients to thespike and favors the formation of grain.Besides,the “heading rate”of tiller and the numberof spikelets are also increased.A further application of a proper amount of nitrogen beforethe emergence of the boot leaf enlarges the area of that leaf,significantly increases the rateof photosynthesis,the rate of grain formation and the grain weight,and finally raises theyield by 17.5 percent.

南京地区丰产小麦的叶色在返青、拔节、孕穗阶段显现“青、黄、青”节奏变化。返青阶段叶片正常显“青”,植株体内有适当高的氮素水平,有利于小穗、小花发育,成长大穗;拔节阶段正常显“黄”,叶、鞘、茎生长协调,有利于茎节发育及壮秆形成;孕穗阶段叶色转“青”,有利物质运转,籽粒灌浆顺利,不实小穗减少,增粒、增重。在壮苗基础上重施腊肥,合理掌握春期追肥,控制叶片正常显青、落黄,有利形成壮秆、大穗,增粒增重、稳定高产。

 
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