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bt基因      bt gene(188) bt(928) bt genes(28) bt transgenic(201) 目前没有对本词条修改信息 用户纠错 您要纠错的词条： bt基因 您要纠错的译词项： bt genebtbt genesbt transgenic==新增译词== 您的称呼： 您的Email： 请选择您认为该词条有误的原因： 译义不准 拼写错误 译词重复 其他（请在下面输入您的理由） 请输入您认为正确的译词： 请输入您修改该词条的依据(参考资料或背景知识)：

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为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。   bt gene        The mortality of selected population by transgenic Bt gene tobacco is significantly lower than the control strain when fed on transgenic tobacco plants. 例句来源              For the Bt gene, out-crossing ranged from 8.16% at 1 m to 0.08% at 20 m from the transgenic plants. 例句来源              Our results indicate that N.?lugens and its natural enemies will be exposed to Bt toxins from rice lines transformed with some Bt gene constructs, but that this exposure might not affect N.?lugens and C.?lividipennis fitness. 例句来源              New members of the butyrophilin (BT) gene family have been identified by cDNA and genomic cloning. 例句来源              Introduction and expression of the Actin1 promoter-Bt gene into rice provides japonica rice germplasm resistant to insect attack. 例句来源       更多             bt        This suggests that it is an excellent UV protective agent for the insecticidal crystal proteins of the Bt formulation. 例句来源              Our primary results showed that in U251 and BT325 cell lines, the activity of GFAP promoter was 16.40 and 4.73-fold of the promoter of hTERT (Human Telomerase Reverse Transcriptase), respectively. 例句来源              With TiCl4/MgCl2 (Ti) and Al(i-Bu)3 (Al) as catalysts, the thermoplastic copolymer of 1-butene(Bt) and 1-hexene(He) was synthesized successfully. 例句来源              The effects of Bt/He, Ti/(He+Bt), Al/Ti, temperature and reaction time on conversion, catalyst efficiency(CE), intrinsic viscosity([η]) and insoluble content were studied. 例句来源              Results showed that the optimal polymerization conditions were: He/Bt = 0.25, temperature 40°C-50°C, Al/Ti = 400-500, Ti/(Bt+He) = 3 × 10-5 - 4 × 10-5, time 4 h. 例句来源       更多             bt genes        The flow frequency and distance of tfd A and Bt genes were similar, but the pollen-mediated gene flow of tfd A cotton was higher and further to the transgenic block than that of Bt cotton (χ2 = 11.712, 1 degree of freedom, p>amp;lt;0.001). 例句来源              Broccoli plants with pyramided cry1Ac and cry1C Bt genes control diamondback moths resistant to Cry1A and Cry1C proteins 例句来源              Broccoli lines carrying both cry1Ac and cry1C Bt genes were produced by sexual crosses of cry1Ac- and cry1C-transgenic plants. 例句来源              Plants containing both genes were selected by tests for resistance to kanamycin and hygromycin, and confirmed by PCR analysis for the Bt genes. 例句来源              These results should help guide the development of strategies for effective management of insect pests and for sustainable deployment of Bt genes. 例句来源       更多             bt transgenic        A separation method for Bt toxic protein CrylAb from Bt transgenic rice (Ke Ming Dao) by ion-exchange chromatography has been developed and validated. 例句来源              Bt transgenic rice-extract containing CrylAb toxic protein is the matrix for separation. 例句来源              For the larvae that were fed with the leaves of Bt transgenic poplar, the peak value of superoxide dismutase and catalase presented at the time of 24-h feeding, while the peak of peroxidase took place at the time of 12-h feeding. 例句来源              The activities of these protective enzymes for the larvae that were fed with leaves of CpTI transgenic poplar peaked 12 h later than that of those fed with leaves of Bt transgenic poplar. 例句来源              The homozygous T1 single-locus insert GFP/Bacillus thuringiensis (Bt) transgenic canola (Brassica napus, cv Westar) with two copies of the transgene fluoresced twice as much as hemizygous individuals with only one copy of the transgene. 例句来源       更多

Breeding of insect resistant cotton with gene engineering is one of the popular field of cotton biotechnology that bring hope for the prevention and control of cotton pests.This paper reviews the advance of study on the seperation and decoration of resistant insect genes,the introduction methods of resistant genes,and the field expression oftransgenic resistant pest cotton.And also,the paper points out the existing problems in the biotechnology and looks in to the future developing direction.             抗虫转基因棉花的培育是近年来棉花生物技术研究的热点，它为棉杜虫害的防治展示了希望。用于棉花抗虫基因转化的方法有根癌农杆菌Ｔｉ质粒介导法、聚乙二醇法、基因枪法和花粉管通道法。用于棉花抗虫植株培育的主要基因有ＢＴ基因和ＣｐＴＩ基因，其中ＢＴ基因应用较多，用其培育出的转基因棉花，在田间用药量减少５０％的情况下而不影响产量，这些转基因棉花在美国已大面积示范推广。本文从抗虫基因的导入和抗虫基因的田间表现三个方面，综述了棉花抗虫基因工程的研究进展。并指出了该领域目前存在的主要问题和将来的发展前景。 文摘来源          Systematic studies were carried out on effects of transgenic Bt cotton on popaulation dynamic of the main pests and their natural enemies in the single cotton and interplanted fields.The result showed that Bt cotton was highly resistant to Cotton Bollworm( Helicoverpa armigera )and Anomis flava with all the remaining numbers of pests lower than the prevention index.Fabricius,the seedling Aphids,summer Aphids,Empoasca biguttula shiraki increased ...             １９９５～１９９６年在田间系统研究了转Ｂｔ基因棉花品系９３－４在单作和麦套２种种植方式下，对主要棉花害虫及其天敌种群消长的影响。结果表明：在单作和麦套条件下，转Ｂｔ基因棉对棉铃虫、棉造桥虫幼虫均有良好的抗性，残虫量均低于防治指标；在单作条件下，转Ｂｔ基因棉田比常规棉田的棉苗蚜、棉伏蚜和叶蝉分别增加２０．３０％，２１．３８％和６７．６２％，红蜘蛛、棉蓟马和白粉虱分别减少５８．４２％，３９．６２％和３９．０６％；在麦套条件下，转Ｂｔ基因棉田的棉苗蚜和棉蓟马分别减少５．８８％和７９．４６％，棉伏蚜、红蜘蛛、白粉虱和棉叶蝉分别增加１４．６２％，７５．４８％，４８．２２％和５８．５４％；在单作和麦套条件下，转Ｂｔ基因棉田比常规棉田捕食性天敌略增加，寄生性天敌减少，天敌总量无明显差异。 文摘来源          Susceptible bioassay base line and discrimination doses for biopesticide Bacillus thuringiensis(Bt) on susceptible strain (SUS1) of Helicoerpa armigera (Hübner) with the diet infection method were established.The susceptibilities to commercial Bt subspecies kurstaki formulation in newly hatched larvae of H. armigera collected from six counties of five provinces were tested in 1995. The results indicated that the five populations of H. armigera from Yanggu(Shandong), Handan(Hebei), Xinxiang(Henan...             用饲料感染法建立了棉铃虫Ｈｅｌｉｃｏｖｅｒｐａａｒｍｉｇｅｒａ（Ｈüｂｎｅｒ）敏感品系（ＳＵＳ１）对Ｂｔ生物农药的敏感毒力基线和区分剂量，１９９５年测定了五省六县棉铃虫初孵幼虫对Ｂｔ生物农药的敏感性，结果表明：山东阳谷、河北邯郸、河南新乡、安徽萧县及江苏丰县棉铃虫已产生早期抗性，抗性个体百分率为５％～１０％，与敏感品系相比，ＬＣ５０值稍有增加，但斜率ｂ值明显变小；而江苏东台棉铃虫仍属敏感。这是国内外首次诊测到棉铃虫对Ｂｔ生物农药抗性。用棉叶喂饲法测定比较了转Ｂｔ基因棉花品系对不同种群棉铃虫的抗虫性效果，结果表明：用早期抗性的阳谷和新乡棉铃虫初孵幼虫接虫５ｄ后平均死亡率较敏感品系下降１６％～２９％，说明棉铃虫对Ｂｔ农药与转Ｂｔ生物基因棉花品系间存在交互抗性。还讨论了Ｂｔ农药的抗性治理对策。 文摘来源   << 更多相关文摘

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