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susceptible varieties
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  感病品种
     When the temperature was below 10℃,the rate of infected leaves of susceptible varieties was 6.3%, while when the temperature increased to 25℃, 59.8% leaves were infected.
     高温高湿的环境利于病害的发生,温度低于10℃,感病品种病叶率平均为6.3%,温度为25℃时达59.8%;
短句来源
     These susceptible varieties are only 5~6 days for disease latent period, and their initial and final disease incidences are 17.5~33% and 87~100%, respectively.
     感病品种发病潜育期为5~6天,起始发病率为175~330%,最终发病率为87~100%,卷叶症状70~90%;
短句来源
     In this study, the disease resistance identification in the parental varieties and the population F1, F2 and B1F1 from the crosses involving Digu and four susceptible varieties was carried out by inoculation with two Chinese blast strains, ZB13, and ZB15. The results demonstrated that Digu had one dominant gene Pi-d(t) to ZB13, which had been reported by Li SG .
     利用我国稻区的稻瘟病菌系ZB13和 ZB15对地谷与感病品种江南香糯的杂交 F1、 F2和 B1F1群体,以及地谷与感病品种丽江新团黑香、冈 46B和 8987的 F2群体进行接种鉴定,根据抗病性的分离确认地谷对 ZB13和 ZB15的抗性受显性基因控制。
短句来源
     The infected leaves and healthy leaves of susceptible varieties Granda、RebelⅢ、RebelJ、SR8500 and resistant varieties SR5100、Franklin、Reliant、SR5200E were tested for their contents of cholorophyll and field disease incidence . The results showed relative index was-0.872~(**).
     以16个草坪草品种为材料,测定了感病品种Granda、RebelⅢ、RebelJ、SR8500 和抗病品种SR5100、Franklin、Reliant、SR5200E等感染叶枯病后的叶绿素含量,以未发病叶为对照,结果表明:叶绿素含量在未发病叶中与田间发病率之间呈极显著负相关关系,相关系数r=-0.872**,且极显著相关(P<0.01)。
短句来源
     3. After treated by toxin, changes of some protective enzymes in the resistant and susceptible varieties indicated that changes of SOD, POD and CAT were similar: the activities of enzymes were declined;
     3.经粗毒素处理后,抗、感品种细胞内保护酶活性变化结果表明,对于SOD、POD、CAT酶活性,抗病品种的活性均高于感病品种,从平均水平上看,酶活性下降,且抗病品种下降比率小于感病品种
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  “susceptible varieties”译为未确定词的双语例句
     The highly resistant,middle resistant,low resistant and susceptible varieties were 11.54%,23.08%,19.23% and 46.15%.
     高抗、中抗、低抗和感虫类型的种质材料分别占参试种质材料的11.54%,23.08%,19.23%和46.15%。
短句来源
     Susceptible varieties of tea are inoculated with the basidiospores of Exobasidium vexans Massee at 20℃. After 2 hours, the basidiospores on leaves began germinating (germination rate 3.1%). The germination percentage is 7.9% after 4 hours, but it becomes as high as 21.3% after 24 hours.
     1.在20℃左右,用茶饼病菌(Exobasidium vexans Massee)的担孢子接种于感病的茶树品种上,2小时后叶面上的担孢子开始萌发(萌发率3.1%),4小时后的萌发率为7.9%,24小时则高达21.3%。
短句来源
     These mungbean accessions can be classified into 4 groups, i. e., the wild-type resistance group (TC1966), the cultivar resistance group (V2709), the progeny resistance group(VC3890A2/TC1966-23) and the susceptible varieties with their progenies group.
     根据聚类分析结果将它们分成抗豆象野生种(TC1966)、抗豆象栽培种(V2709)、抗豆象杂交后代(VC3890A2/TC1966-23)和混合类型4个大组。
短句来源
     In present study, the resistant varieties ARC 10239 and Rathu Heenati(RHT), and susceptible varieties Minghui 63 and Taichung Native 1 (TN 1)were selected as parents to make crosses for F2 populations. Finally, theresistant gene Wbph2 have been mapped.
     本研究以抗白背飞虱品种ARC10239和Rathu Heenati(RHT)为抗虫亲本,以明恢63和Taichung Native 1(TN1)为感虫亲本,分别构建了F_2群体,最终定位了抗白背飞虱基因Wbph2。
短句来源
     The immune and high resistant varieties were not found,the percentage of disease-resistant varieties was 42.8%,moderate resistant varieties was 39.2%,disease susceptible varieties was 11.3% and highly susceptible varieties was 6.7%.
     在388个材料中没有发现免疫和高抗的品种,其中抗病品种占所鉴定总数的42.8%,中抗水平占39.2%,感病占11.3%,高感占6.7%。
短句来源
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  相似匹配句对
     Nectarine varieties are more susceptible to Cladosporium carpophilum.
     油桃比毛桃发病重。
短句来源
     All Japonic rice varieties were susceptible to BPH.
     对褐稻虱具有抗性的,主要是国外的籼稻型品种,粳稻型品种几乎全感此虫。
短句来源
     On the Varieties of the Arabs
     论阿拉伯人的多样性
短句来源
     On the Varieties of Marxism
     马克思主义诸形态
短句来源
     but susceptible to vancomycin.
     对万古霉素敏感。
短句来源
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  susceptible varieties
Plant age at inoculation had no effect on disease-severity scores of the susceptible varieties, and little or no effect on those of the resistant varieties.
      
In both raw and autoclaved forms, the insect susceptible cowpeas were better (P>amp;lt;0.05) utilized than their resistant counterparts, a condition which was attributable to lower levels of antinutrients in the susceptible varieties.
      
Protein quality of raw and autoclaved cowpeas: Comparison between some insect resistant and susceptible varieties
      
Independent of grain germination, sorghum varieties resistant to biotic and abiotic stresses had on average higher contents of proanthocyanidins (PAs), 3-deoxyanthocyanidins (3-DAs), and flavan-4-ols than susceptible varieties.
      
Comparative investigation of the composition of the protease inhibitors of wilt-resistant and wilt-susceptible varieties of cott
      
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The headblight or scab of wheat caused by Gibberella zeae (Schw.) Petch.has in recent years become more prevalent in the rice-wheat growing area ofEastern China with two heavy epidemics in 1952 and in 1954.It was reportedfrom this area that wheat varieties showed marked differences in their susceptibilityto headblight and that native varieties in general were less susceptible than theimproved ones.It was also reported that the degree of susceptibility appeared tobe related to the stage of host development.In...

The headblight or scab of wheat caused by Gibberella zeae (Schw.) Petch.has in recent years become more prevalent in the rice-wheat growing area ofEastern China with two heavy epidemics in 1952 and in 1954.It was reportedfrom this area that wheat varieties showed marked differences in their susceptibilityto headblight and that native varieties in general were less susceptible than theimproved ones.It was also reported that the degree of susceptibility appeared tobe related to the stage of host development.In 1952,varieties with earlier date ofheading were generally less susceptible than those which headed late. Varietal tests for the headblight resistance were made in Nanking in 1952and 1954.In 1952,235 varieties and hybrids were studied for their resistance toscab under natural conditions in the field.Great differences were found in theirdegree of infection,although none of them was immune.The percentages of in-fected heads ranged from 0.9 to 89.1 with most of them having 10 to 40% infec-tion.No definite correlation was seen between the percentage of infection andthe date of heading or of maturing.In 1954,tests on varietal resistance to scabwere again made with 40 varieties and hybrids including those being relatively lesssusceptible in the previous test.Attempts were made to induce epidemics in thefield by means of artificial inoculation.Results indicated that both mycelial andconidial suspensions were similarly effective for artificial inoculation.The averagepercentages of infected heads in the inoculated plots ranged from 4.2 to 77.7 incontrast to the uninoculated plots where the average percentages of infected headsbeing only trace to 7.1 with one variety not infected. From the experimental results obtained in 1952 and 1954,it was found thatrelative stability in resistance to headblight existed among different wheat varie-ties,although there was great variation in varietal resistance due to the effect ofenvironmental factors.Two hybrids,"5201" and "5204",were found to be muchmore resistant than all other varieties tested in both years.Hybrid "5204" gave ??0.9% of infected heads in 1952 and 3.4% in 1954,and hybrid "5201" gave5.5 and 9.0% of infected heads in the respective years.Both hybrids also possessother desirable characteristics such as early maturity,relative high yield,stiffystems,and high resistance to the stripe rust. Greenhouse studies were made in 1954 with two susceptible varieties ofwheat for testing their susceptibility to headblight at six different stages of deve-lopment from shooting to hard dough.Results indicated that the plant was sus-ceptible at all these stages of development with a tendency of being more heavilyinfected toward maturity.It was also observed that temperature had obvious effecton the degree of infection.Plants inoculated at flowering stage were more heavilyinfected when kept at 25℃ after inoculation than when kept at 15℃.However,the inoculated plants kept at 25℃ during the day and at 15℃ at night resultedin a degree of infection similar to those kept at 25℃ all the time.

(一)小麦赤微病在苏、浙、皖的稻麦两熟地区经常严重发生,1952及1954年两度猖獗流行,造成苏南及浙江地区小麦生产上的严重损失。通过调查,发现各地小麦品种对病害的反应确有显著差异。地方品种,一般发病较轻,而改良品种如“2905”、“2419”、“玉皮”、“矮立多”等,常常严重地感染病害。(二)1952年在自然情况下,观察此较235个小麦品种结果,虽没有一个品种不发病,但品种间的发病率相差极大,自0.9%至89.1%,而不同品种感染程度的轻重与抽穗期及成熟期的早迟关系不大。(三)1954年大田人工接种结果,效果显著,供试40个品种接种区的最高发病率达77.7%,而自然感染区的最高发病率只有7.1%。在接种试验中,初步证明:(1)大量有效的病原体与适合病害发生的气候因子同是病害流行的主要条件;(2)接种方法,用菌丝体接种与用分生孢子接种的效果,并无多大差别;(3)品种的抽穗先后,与发病轻重无一定关系。(四)温室试验指出,小麦自抽穗至糊熟各期麦穗被害率相似,但小穗的被害率在抽穗期最低,开花以后,有愈近成熟感染程度愈重的趋势。(五)开花期接种后的小麦,置於25℃的麦穗被害率和置於15℃的相似,但前者的小穗被害率此后...

(一)小麦赤微病在苏、浙、皖的稻麦两熟地区经常严重发生,1952及1954年两度猖獗流行,造成苏南及浙江地区小麦生产上的严重损失。通过调查,发现各地小麦品种对病害的反应确有显著差异。地方品种,一般发病较轻,而改良品种如“2905”、“2419”、“玉皮”、“矮立多”等,常常严重地感染病害。(二)1952年在自然情况下,观察此较235个小麦品种结果,虽没有一个品种不发病,但品种间的发病率相差极大,自0.9%至89.1%,而不同品种感染程度的轻重与抽穗期及成熟期的早迟关系不大。(三)1954年大田人工接种结果,效果显著,供试40个品种接种区的最高发病率达77.7%,而自然感染区的最高发病率只有7.1%。在接种试验中,初步证明:(1)大量有效的病原体与适合病害发生的气候因子同是病害流行的主要条件;(2)接种方法,用菌丝体接种与用分生孢子接种的效果,并无多大差别;(3)品种的抽穗先后,与发病轻重无一定关系。(四)温室试验指出,小麦自抽穗至糊熟各期麦穗被害率相似,但小穗的被害率在抽穗期最低,开花以后,有愈近成熟感染程度愈重的趋势。(五)开花期接种后的小麦,置於25℃的麦穗被害率和置於15℃的相似,但前者的小穗被害率此后者高。日间25℃和夜间15℃交替的变温处理,发病情形与始终置於25℃的相近。(六)不同小麦品种对于赤微病具有相对稳定的抵抗性或感染性。“5201”及“5204”等杂交系,在自然感染和人工接种情形下,发病都很轻微,并且具有早熟、丰产、秆硬和高度抵抗条锈等优良特性。

The apple mosaic occeurs sporadically in the northern China, and in the past several years, the disease has become more severe in shensi province.This paper is a preliminary work of the apple mosaic, and consists of several parts as follows:1. A brief review of the disease from 1825 to 1958 is given.2. The results of a scries of grafting transmission tests and minor element deffici--ency tests have prooved that the disease is a virosis, and identieal with the apple mosaicwhich has been cited in many literatures.3....

The apple mosaic occeurs sporadically in the northern China, and in the past several years, the disease has become more severe in shensi province.This paper is a preliminary work of the apple mosaic, and consists of several parts as follows:1. A brief review of the disease from 1825 to 1958 is given.2. The results of a scries of grafting transmission tests and minor element deffici--ency tests have prooved that the disease is a virosis, and identieal with the apple mosaicwhich has been cited in many literatures.3. The syrnptoms of disease are detailedly deseribed in 6 types:① the mottling type;② the mosaic sype;③ the Vein banding type; ④ the clond-like bloch type;⑤ the ring spottype and⑥ the marging chlorosis type.4. The virus is not earried by the apple seeds, and tests of sap inoculation were a-ll failed. The probabilities of virus trunsmission by aphids or leafhoppers are still unc-ertain.5. In natural conditions. the virus attacks many varieties of malus pumila, M. asi--atica, M. baeeata, M. prunifolia, M. Kansuensis and M. spectabilis. the susceptibili-ties of apple varieties are quite dibffenent:white winter pearmain,Ben Davis, Tolman'swe-et and Golden Delicious are the most suffering varieties, but on the contrary, staymanwinesap, Akin, "Indian" and Early meintosh are highly resistant.6. The goowth of shoots of the infected white winter pearmain decreases by 27%.And the fruits from infeeted trees become rotten more easily in storage, especoally bythe anthracnose:7. The advises of discase control:① Quaranting, including seedlings and scions.② Raising the vigor of trees by improving cultivated conditions.③ Controlling the sucking inseets, especielly the aphids.④ Avoiding to cultivate the most susceptible varieties

1.苹果花叶病在我国许多苹果产区都有分布,如辽宁、山东、河北、山西、陕西及甘肃等省。其中陕西省的关中、陕北及陕南地区均有病害发生,尤以关中地区发病普遍而且严重。2.作者阅读了国内外有关苹果花叶病的部份文献(包括摘要),对病害的研究历史和现况作了一个简要的综述。其中包括病害的研究历史,寄主范围及品种反应,病毒株系及其症状特点,病毒的传播及其在果园中蔓延的情况,病害对于苹果的生长及产量的影响以及防治途径等方面。3.花叶病的症状具有以下6种类型:①斑驳型②花叶型③網斑型(其中又分为条斑亚型和網斑亚型)④云斑型⑤环斑型⑥镶边型;每种类型都有其独特的症状。在自然条件下所有这些类型(镶边型除外)均可发生于同一植株,同一株条,甚至同一叶片上。在各类型之间还可混合发生,因此具有不少中间类型;所有这些情况构成了病害症状的复杂变化。4.病害的盛发期是与植株新梢生长期相一致的;此外,较温暖的气温(10-20℃),较强烈的光线,较干旱的条件以及树势衰弱均有利于病害的发生。5.通过嫁接接种试验及Fe.zn.mnmg.B等微量元素的诊断试验,证明苹果花叶病是由于pyrus virus 2号病毒寄主所引起的侵染性病害。病毒不能藉汁液及种子...

1.苹果花叶病在我国许多苹果产区都有分布,如辽宁、山东、河北、山西、陕西及甘肃等省。其中陕西省的关中、陕北及陕南地区均有病害发生,尤以关中地区发病普遍而且严重。2.作者阅读了国内外有关苹果花叶病的部份文献(包括摘要),对病害的研究历史和现况作了一个简要的综述。其中包括病害的研究历史,寄主范围及品种反应,病毒株系及其症状特点,病毒的传播及其在果园中蔓延的情况,病害对于苹果的生长及产量的影响以及防治途径等方面。3.花叶病的症状具有以下6种类型:①斑驳型②花叶型③網斑型(其中又分为条斑亚型和網斑亚型)④云斑型⑤环斑型⑥镶边型;每种类型都有其独特的症状。在自然条件下所有这些类型(镶边型除外)均可发生于同一植株,同一株条,甚至同一叶片上。在各类型之间还可混合发生,因此具有不少中间类型;所有这些情况构成了病害症状的复杂变化。4.病害的盛发期是与植株新梢生长期相一致的;此外,较温暖的气温(10-20℃),较强烈的光线,较干旱的条件以及树势衰弱均有利于病害的发生。5.通过嫁接接种试验及Fe.zn.mnmg.B等微量元素的诊断试验,证明苹果花叶病是由于pyrus virus 2号病毒寄主所引起的侵染性病害。病毒不能藉汁液及种子进行传播;蚜虫及浮尘子的初步接种试验,未能获得肯定的结论。6.病毒的寄主范围根据调查和嫁接接种试验的初步结果,包括苹果,冬红果,绵苹果,沙果,林檎,秋子,中花,蜜果,白果,荼子,山定子,陇东海棠以及花海棠等多种植物。不同的西洋苹果品种对于病毒感染性具有明显的差异,其中以白龙,甘露,华绵及金冠等品种最为感病,其次为黄魁,红姣,红玉,国光及元帅等品种,而英金,大珊瑚及印度等品种则高度抗病。7.重病株的新梢生长长度较健株平均减少27%。采自病株的果实其可溶性物质的含量较无病株者畧高,同时不耐貯藏,特别容易遭受炭疽病的为害;经过四个月的貯藏试验,其损失率较健株果实增高9.6-35.2%。但是在二年产量的比较中,病株与健株没有显著区别。8.苹果花叶病在关中地区的最早发生历史已不可考。但在1947年以前即有零星分布,病害在1951-1953年大量扩展蔓延,推测其原因有二:①栽植有病苗木。②可能与蚜虫等害虫的大发生有关。9.建议病害防治应从①苗木,接穗严格执行检疫,②加强栽培管理,增强树势,③在严重发病地区避免大量种植高度感病品种,④防治可能传播病毒的昆虫,如蚜虫等。

Varietal reactions of rice to the bacterial leaf blight (Xanthomonas oryzas) were tested during 1957-1958 by means of artificial inoculations.Among 1209 varieties tested by succes-sive inoclations,none of them was found to be immune to the disease.But 23% of thevarieties tested was moderately resistant,2.15% was highly resistant.In general,varietiesof the glutinous type are more resistant than the non-glutinous type,and late matured varie-ties are more resistant than those matured earlier.Leaves of the susceptible...

Varietal reactions of rice to the bacterial leaf blight (Xanthomonas oryzas) were tested during 1957-1958 by means of artificial inoculations.Among 1209 varieties tested by succes-sive inoclations,none of them was found to be immune to the disease.But 23% of thevarieties tested was moderately resistant,2.15% was highly resistant.In general,varietiesof the glutinous type are more resistant than the non-glutinous type,and late matured varie-ties are more resistant than those matured earlier.Leaves of the susceptible varieties areusually characterized by having higher contents of certain free amino acids such as asparticacid and glutamic acid,and lower contents of polyphenols and reducing sugars.In somevarieties analyzed,however,the difference is not significant.Furthermore,it has been foundthat differences in the above mentioned components between different varieties are usuallyless significant than those induced in the same variety by varying the cultural Conditions,suchas the levels of nitrogen fertilizers to be reported in the following paper.Consequently,other physiological characteristics of varieties should be considered in explaining the mecha-nism of varietal resistance to the disease.

水稻不同品种对白叶枯病的抗病性不同。用人工接种的方法测定1209个品种,未发现有完全不发生白叶枯病的品种,但是发病较轻可列为抗病的,约占23%左右。高度抗病的品种26个,占2.15%。(禾山)稻和粳稻品种都有发病很重的,但是,粳稻抗病品种比(禾山)稻多。晚稻此早稻和中稻多。抗病品种叶片的有机物成分和含量与感病品种不同,抗病品种的多元酚和糖的含量高于感病的品种,游离氨基酸中的谷氨酸和门参氨酸的含量低于感病的品种。

 
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