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育种     
相关语句
  breeding
    Genetic Diversity Analysis of Colletotrichum Gloeosporioides from Stylo and Anthracnose Resistant Breeding
    柱花草炭疽病原菌遗传多样性分析及抗病育种研究
短句来源
    PROGRESS IN BREEDING FOREIGN RESEARCH FOR PEST RESISTANCE IN VEGETABLES
    国外蔬菜抗虫育种研究的进展
短句来源
    APPLICATION OF PLANT GENETIC ENGINEERING IN CROP BREEDING
    植物基因工程在作物育种上的应用
短句来源
    Progress on the Studies of Sugarcane Breeding for Resistance to Smut(Ustilago scitaminea Syd.)
    甘蔗抗黑穗病育种研究的进展
短句来源
    ANALYSIS ON GENE EFFECTS OF SOYBEAN RESISTANCE TO CERCOSPARA SOJINA HARA AND ITS APPLICATION IN BREEDING
    大豆灰斑病抗性基因效应分析及在育种中的应用
短句来源
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  breeding for
    Progress on the Studies of Sugarcane Breeding for Resistance to Smut(Ustilago scitaminea Syd.)
    甘蔗抗黑穗病育种研究的进展
短句来源
    ADVANCES IN STUDY OF BREEDING FOR RESISTANCE TO SOYBEAN CYST NEMATODE OF CHINA
    我国大豆孢囊线虫抗源筛选及抗病育种研究进展
短句来源
    Advance in the Study on Verticillium Wilt of Cotton and It′s Breeding for Resistance
    棉花黄萎病及其抗性育种研究进展
短句来源
    Discussion on Breeding for Resistance to Disease of Wheat Scab
    小麦赤霉病与抗病育种若干问题的探讨
短句来源
    Stylo anthracnose and the progress of its breeding for resistance to disease
    柱花草炭疽病及其抗病育种研究进展
短句来源
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  breeding program
    RAPD marker (OPH17(1400)) and SCARmarkers (SCAR1400 and SCAR(1265)) as well as fluorescence in situ hybridization (FISH) technique were used to detect wheat powdery mildew resistance gene Pm21 derived from Haynaldia villosa (6AL/ 6VS) in different genetic background of wheat breeding program.
    利用小麦抗白粉病基因Pm21的RAPD标记(OPH17(1400))、SCAR标记(SCAR(1400)和SCAR(1265))和荧光原位杂交技术(FISH)对小麦抗病育种材料中的抗白粉病Pm21基因进行了分子鉴定和标记辅助选择。
短句来源
    Among a total of 372 RAPD amplification reactions, 28 reastions (7.53%) yield no ampliflcation products, and the amplification products of 21 reactions (5.64%) were difficult to interpret the presence or absence of the OPH17(1400), indicating that RAPD marker OPH17(1400) is less reproducible and reliable, so that its usage in breeding program is limited.
    利用随机引物OPH17进行RAPD分析结果表明,在3~5次重复共372次RAPD扩增中,有28次(7.53%)未获得扩增产物,有21次(5.64%)扩增结果难以判断目标片段OPH17(1400)的有无,说明RAPD标记检测结果的可靠性和重现性较差,在育种中应用有一定局限性。
短句来源
    However, SCAR markers, SCAR(1400) and SCAR(1265), were amplified in all 488 PCR reactions, suggesting that SCAR markers are highly reproducible and reliable, and can be used in breeding Program.
    而在利用SCAR标记共488次PCR扩增中,均可以扩增出与Pm21基因连锁的多态性SCAR(1400)或SCAR(1265)目标片段,说明SCAR标记是稳定、准确、可靠的DNA分子标记,可应用于育种群体中Pm21基因的分子鉴定和标记辅助选择。
短句来源
    The application of these germplasm in maize breeding program was discussed.
    讨论了这些种质资源在我国抗玉米矮花叶病遗传及育种研究上的应用价值
短句来源
    This marker has been used successfully in marker assisted selection in the flax breeding program.
    目前这一标记已成功地应用于亚麻抗锈病基因M4的分子标记辅助选择育种
短句来源
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  breeders
    We suggest that those breeders for TMV resistance on tomato, must pay attention to the emergence of TMV—1, TMV—2 and TMV—1, 2 strains.
    故在番茄抗TMV育种中尚应考虑到抗1及2株系的能力。
短句来源
    Finding novel beneficial genes from rice germplasm, widening rice genetic variability, gene mapping and inheritance studies of new genes by means of classical and molecular tools, have always provided basis for the rice breeding. Of these major objectives of rice breeding and genetics studies, the exploitation and mapping of new resistance genes have always attracted great attentions of rice breeders and geneticists.
    发掘水稻有利新基因,丰富水稻的遗传多样性,探索有利新基因的遗传规律、对新基因进行分子定位,为育种利用奠定基础,是国内外水稻遗传育种界所关注的主要研究课题,而水稻抗性新基因的发掘定位更是为遗传育种研究者所重视。
短句来源
    To screen soybean germplasm resistant to soybean rust (Phakospora pachyrhzi) to provide germplasm resources for soybean breeders, germplasms resistance evaluation was made.
    其中有关大豆抗锈病品种筛选研究是为了给中国大豆抗锈病育种工作积累一些种质材料,为大豆抗锈品种的选育工作打好基础。
短句来源
    So far, very little was known about the genetic structure of this pathogen, which has made the disease control especially the sheath blight resistance breeding a difficult task. Hence, more and more pathologists and rice breeders have paid great attention to it.
    由于缺乏对水稻纹枯病菌遗传结构的了解,给该病害的防治特别是抗病育种工作带来了很大的困难,这已引起植物病理学家和水稻育种学家普遍重视。
短句来源
    For breeders, it is very impormant to understand the interaction of Brassica napus and Sclerotinia sclerotinia in molecular level.
    在分子水平上了解油菜(Brassica napus)与核盘菌(Sclerotinia sclerotiorum)在侵染早期的互作过程,对抗病育种有重要意义。
短句来源
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      breeding
    Accurate identification of varieties (clones) and knowledge of their genetic relationships are essential for poplar breeding and variety management.
          
    It was observed that the winter range is smaller than that in the breeding season.
          
    Due to the limitation in distribution and the importance as breeding material for germplasm storage, it has been considered as first class among the national protected rare plants.
          
    For this reason, the present study is significant in probing plant flora, origin and evolution of Triticeae, and crop breeding.
          
    Breeding and application of Jiafuzhan, a new elite early indica rice cultivar in China
          
    更多          
      breeding for
    On Using the Nod5-Tagged Pea Lines as the Donors in Breeding for Higher Dinitrogen Fixation
          
    The results of the apple breeding for digenic resistance to scab (1979-2000), which is more long-term than the monogenic breeding, have been reviewed.
          
    This demonstrates that the use of these resistance donors in wheat breeding for several decades has been effective.
          
    Relationships between the predispositions to pendulum movements (PMs), catalepsy, and audiogenic epilepsy in the course of breeding for "nervousness" and freezing have been studied.
          
    Since the accessions were rich in leaf rust resistance genes, including effective ones, and carried rare combinations of these genes, they were proposed as donors to be universally employed in breeding for immunity in all regions of Russia.
          
    更多          
      breeding program
    It is essential to identify the physiological mechanisms of drought tolerance to complete conventional breeding program.
          
    Anther culture offers a rapid method of generating homozygous lines for breeding program and genetic analysis.
          
    Integration of these QTLs into an appropriate variety may lead to a successful rice breeding program for cold tolerance.
          
    The majority of facilities have some type of captive breeding program, with some reporting as high as 80% of their total animals captive born.
          
    Recovery efforts for Peltophryne lemur include a captive-breeding program, reintroductions island-wide educational outreach, protection and restoration of existing habitat, and the creation of new breeding ponds.
          
    更多          
      breeders
    aestivum type and are of great interest to breeders.
          
    Hence, the ratio of activities of the gonadotropins of different species as determined by in vitromaturation of sturgeon oocytes may markedly differ from that upon injection of these preparations in breeders.
          
    Astaurov-the First President of the Vavilov All-Union Society of Geneticists and Breeders
          
    Using genetically homogenous or isogenic strains for the genetic analysis or for production of the new plant cultivars or animal breeds, geneticists and breeders often face the problem of stability of the strains.
          
    The studies have been performed in order to obtain a more correct assessment of seed quality based not only on their germination and energy of germination (traditionally used by forest breeders), but also on their genomic stability.
          
    更多          


    Сначала выл обнаружвн антракноз кенафа(Colletotrichum hibisci Pollacci)в1951г.на полях сельскохозяйственных опытных станциях Сюнжао и Ляоян в про-винции Ляонин и Гуньчжулинского института сельскохозяйственных наук в прови-нции Гирин,а в течение 1951-1953 гг.эта болезнь уже была широко распростра-нена во всех районах возделывания кенафа в провинции Ляонин,что принеслохозяйству губительный ущерб. Возбудитель антракноза кенафа способен перезимовать и в зараженных семе-нах и в зараженных тканях растений(стебепе,коробочке),которые...

    Сначала выл обнаружвн антракноз кенафа(Colletotrichum hibisci Pollacci)в1951г.на полях сельскохозяйственных опытных станциях Сюнжао и Ляоян в про-винции Ляонин и Гуньчжулинского института сельскохозяйственных наук в прови-нции Гирин,а в течение 1951-1953 гг.эта болезнь уже была широко распростра-нена во всех районах возделывания кенафа в провинции Ляонин,что принеслохозяйству губительный ущерб. Возбудитель антракноза кенафа способен перезимовать и в зараженных семе-нах и в зараженных тканях растений(стебепе,коробочке),которые являютсяочагом заразного начала кенафа в следующем году.В полевых условиях Гуньчжу-лина продолжительность возбудителя антракноза кенафа длится не больше на 12месяцев,а в лабораторных условиях больше на 17 месяцев.Количество возбуди-теля в зараженных семенах,сохранившихся в лаборатрии,снизижается из года вгод,и погибает целиком через 31 месяца при сохранении. Опыт показывает,что для уничтожения сохраняющихся в пораженных семенахвозбудителей не дает полной эффективности,как сухое протравливание семян,так изамоченные семена препаратом,и что из способов обработки оказывается найбопееэффективным термическое протравливание.При термическом протравливании про-изводят следуюшим образом:семена предварительно злмачивают в холодной водепри температуре около 15℃ в течение 8 часов,после того семена переклады-вают в горячую воду при 52℃ в течение 10 минут или при 55℃ в течение 5минут,и таким образом,можно полносмью уничтожить возбудители в семенах. ??Такой способ не дает отрицательного влияния на всхожесть семян и на развитиевсходов кенафа.Однако,при предварительного замачивания семян в холоднойводе,необходимо перемешивать семена несколько раз и вылавливать ппывуюшие наповерхность воды семена,без чего невозможно попучить полный эффект обработки. В нашем институте был прекращен посев кенафа в1953 году,а с 1954 годавновь был начат посев здоровыми семенамн или протравленными семенами.В ме-чение последующих трех годов подряд сеют кенаф не наблюдают бопезни.Отсюдаследует,что после полного прекращения посева кенафа в течение двух годов в зара-женных районах,можно постепенно восстановить возделывание этой культуры путемсева здоровыми или протравленными семенами.

    洋麻炭疽病(Colletotrichum hibisci Pollacci)于1951年在辽宁省熊岳、辽陽及吉林省公主嶺等地試驗場內开始發現,到1952—1953年則已在辽宁省所有洋麻栽培区流行,造成毀灭性的灾害。受病种子与組織(病秆,病果)內的病菌都可以越冬,成为次年的第一次發病来源。在公主岭的自然条件下,病菌生活力不超过12个月,在实驗室的条件下,約可存活17个月以上。貯藏在室內的带病种子中的病菌逐年减少,至31个月后,全部死亡。試驗証明:不論粉剂拌种或药液浸种对洋麻种子内寄藏的病菌沒有完全的杀菌效果。在各种种子处理方法中,以冷水温汤浸种为最有效。在室温下(約15℃左右),冷水預浸8小时,再浸入52℃温水中10分钟或55℃5分钟,即可全部消灭种子中的病菌,且对种子發芽及幼苗生育沒有影响。但在冷水預浸时,必須搅拌数次,捞尽漂浮的种子,否則不能得到完全的消毒效果。本所育种系試驗地洋麻在1953年停种一年后,于1954年开始,分別用已消毒的和无病种子播种,三年来已不再發病,故在病区徹底蚔謨赡旰?采用无病的或已消毒的洋麻种子,逐步恢复洋麻生产是可能的。

    The present studies were chiefly carried out during the years 1957 to 1961in Peking.As the differentials chosen by Gassner and Straib has been provedto be inadequate for the identification of the physiologic races of stripe rustin this country,a new set of differentials including Pi-Ma-1,Si-Pei 54,Si-Pei-Fong-Shou,Quality,Kansu 96,Trigo Eureka F.C.S.,Strubes Dickkopf,Fulhard,and aBulgarian spring wheat Lutescens 128 were selected on the basis of a series oftrials in which about 200 wheat varieties were tested...

    The present studies were chiefly carried out during the years 1957 to 1961in Peking.As the differentials chosen by Gassner and Straib has been provedto be inadequate for the identification of the physiologic races of stripe rustin this country,a new set of differentials including Pi-Ma-1,Si-Pei 54,Si-Pei-Fong-Shou,Quality,Kansu 96,Trigo Eureka F.C.S.,Strubes Dickkopf,Fulhard,and aBulgarian spring wheat Lutescens 128 were selected on the basis of a series oftrials in which about 200 wheat varieties were tested for their resistence against41 isolates.Results obtained by greenhouse inoculation tests with 21 importantvarieties in their adult stage and data from rust nurseries and field survey in-dicated that the discriminative effects of the new differentials are satisfactory.325 collections from various districts of 15 provinces were analysed and 10races were differentiated.They have been designated as CY-1 to CY-10,amongwhich CY-1 was the.most prevalent,followed by CY-8.Since 1955-1956,Pi-Ma-1,one of the most important commercial winterwheat had lost its resistence against stripe rust and many other immune varietieswere also found to become infected.Data showed that the Pi-Ma-1 epidemicswere attributable to the prevalence of race CY-1.Besides its higher compatibility.with Pi-Ma-1,this race was characterized by its ability to attack Si-Pei 54,Si-Pei-Fong-Shou,Nung-Ta 183,Shih-Kia-Chwang-407,and their relatives.CY-8was compatible with Quality and Kansu 96.The suffering of these two varietiesfrom stripe rust in many regions during recent years were closely correlated tothe rise of this race.CY-2 was compatible with Si-Nung 6028,incompatible withPi-Ma-1.Race CY-3 acted like CY-8 except that it was less virulent on Fulhard.This race was unable to attack Pi-Ma-1,Shih-Kia-Chwang 407,Si-Nung 6028and Quality.It seemed that in 1957 CY-1 was widely distributed as it comprised37.3% of isolates being identified,however,it was not found in later years.Thereason for its disappearence was not clearly known.It seemed probable that CY-3might be the predominant race before the prevalence of CY-1 which increasedrapidly thereafter due to the extensive distribution of Pi-Ma-1.The characteris-tics of the other races were also described.It was suggested that CY-1,CY-8 and CY-2 should be taken as the mainobjects of the breeding work for stripe rust resistence in this country.

    根据大量的鉴定结果,进一步证明德国的小麦条锈菌鉴别寄主,除个别品种外,不能反映我国条锈菌交异的实际情况;为此,选出了比较适合我国情况的一套鉴别寄主,它们是:Trigo Eureka F.G.S.、Fulhard、Strubes Dickkopf、保加利亚春麦 Lutescens128、碧蚂1号、西北丰收、西北54号、玉皮、甘肃96号。应用所选出的鉴别寄主、四年来共分析了325个标样,它们可划分为10个不同的生理小种,定名为条中1号到10号。条中1号的出现频率最高、分布最广,它能侵染碧蚂1号、西北54号、西北丰收、农大183、石家407等品种及含有3037血统的许多品系。近年来碧蚂1号抗锈性退化即系由于该小种的猖獗。条中8号出现频率仅次于1号,它的特点是对玉皮、甘肃96号有很强致病力。条中2号出现频率虽很低,但它能侵染重要推广品种西农6028。条中3号对碧蚂1号、石家庄407、玉皮、西农6028都没有致病力,这一小种1957年出现频率很高(37.3%),但以后几年未再鉴定到;作者等推测它可能是条中1号取得优势以前的一个主要小种。已经获得的研究结果表明现阶段我国小麦抗条锈病育种工作应以条中1号、2号和...

    根据大量的鉴定结果,进一步证明德国的小麦条锈菌鉴别寄主,除个别品种外,不能反映我国条锈菌交异的实际情况;为此,选出了比较适合我国情况的一套鉴别寄主,它们是:Trigo Eureka F.G.S.、Fulhard、Strubes Dickkopf、保加利亚春麦 Lutescens128、碧蚂1号、西北丰收、西北54号、玉皮、甘肃96号。应用所选出的鉴别寄主、四年来共分析了325个标样,它们可划分为10个不同的生理小种,定名为条中1号到10号。条中1号的出现频率最高、分布最广,它能侵染碧蚂1号、西北54号、西北丰收、农大183、石家407等品种及含有3037血统的许多品系。近年来碧蚂1号抗锈性退化即系由于该小种的猖獗。条中8号出现频率仅次于1号,它的特点是对玉皮、甘肃96号有很强致病力。条中2号出现频率虽很低,但它能侵染重要推广品种西农6028。条中3号对碧蚂1号、石家庄407、玉皮、西农6028都没有致病力,这一小种1957年出现频率很高(37.3%),但以后几年未再鉴定到;作者等推测它可能是条中1号取得优势以前的一个主要小种。已经获得的研究结果表明现阶段我国小麦抗条锈病育种工作应以条中1号、2号和8号三个小种作为主要对象。

    Tests of cotton varieties grown in several cotton-growing areas of this country were carried out for years. An analysis of the results revealed significant differences in the four important economic characters of boll weight, staple, lint percentage and seed index among the cotton varieties grown in the three main cotton-growing areas, namely, the Yangtse River Valley, the Yellow River Valley and the northwest inland. The boll weight, staple, lint percentage and seed index are all the highest in the northwest...

    Tests of cotton varieties grown in several cotton-growing areas of this country were carried out for years. An analysis of the results revealed significant differences in the four important economic characters of boll weight, staple, lint percentage and seed index among the cotton varieties grown in the three main cotton-growing areas, namely, the Yangtse River Valley, the Yellow River Valley and the northwest inland. The boll weight, staple, lint percentage and seed index are all the highest in the northwest interior cotton-growing area; in the Yangtse River Vailey, the staple and lint percentage are higher while the boll weight is less compared with those in the Yellow River Valley.These differences are due to the different ecocircumstances, and should be taken into consideration when one is drawing up a program for demarcation of cotton-growing areas,setting up the breeding objective and developing cultural measures.

    对若干个跨棉区多年的品种试验结果进行研究分析,发现棉花铃重、绒长、衣分及子指四项重要经济性状在西北内陆、长江流域和黄河流域三大棉区表现明显的差异;在西北内陆棉区铃重、绒长、衣分及子指都表现最高;长江流域棉区绒较长,衣分较高,但铃重轻;黄河流域棉区铃重较重,但绒长和衣分均较差。经分析看出:西北内陆棉区具有热量资源丰富,太阳辐射强,光照充足,昼夜温差大,并且可以人工灌溉等良好生态条件,十分有利于棉铃、种子和纤维的发育。因此可以考虑选择适宜区域(南疆一带)发展棉花生产;长江流域棉区具有温度较高,雨量充沛,棉田土壤肥力较好的条件,有利于纤维增长和衣分提高;黄河流域棉区的光照条件较好,昼夜温差较大,雨量适中,比较有利棉铃增大及种子的发育。鉴于这些性状在不同棉区表现的差异,在跨区引种时对此应予以充分考虑和估计;在确定育种目标和良种繁育选择标准时,不同棉区都应有相应的差别;在耕作栽培措施上应针对本棉区生态特点,扬长避短,发挥优势,使之达到高产优质的要求。

     
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