共查询到19条相似文献，搜索用时 390 毫秒
1.
[目的]建立草莓枯萎病的镰刀菌快速检测方法.[方法]利用环介导等温扩增技术(LAMP)针对镰刀菌保守区域ITS设计一套LAMP扩增引物,利用Bst DNA聚合酶完成LAMP扩增反应,对7种常见病原菌进行检测,分析LAMP引物的特异性;比较LAMP与传统PCR方法的敏感性.[结果]建立的LAMP法能够特异性的检测尖孢镰刀... 相似文献
2.
为了利用实时环介导等温扩增（loop-mediated isothermal amplification,LAMP）技术,特异、灵敏、快速地检测检疫性病原菌玉米晚枯病菌（Cephalosporium maydis）,本研究选择种间遗传距离较高的Tef-1α和H3基因作为特异性基因,进行特异性引物的筛选、检测温度的优化、灵敏度和特异性检测等研究。实验结果表明,最佳引物组合为Tef-2,检测温度为65℃,最小检测限为0.10 pg/μL,且只对玉米晚枯病菌靶基因特异,检测应用结果可靠。环介导等温扩增技术能够用于玉米晚枯病菌的高效特异性检测,可为检验检疫部门对玉米晚枯病菌的检测工作提供有力的保障。 相似文献
3.
应用环介导等温扩增技术建立一种快速灵敏的转基因番木瓜GM YK品系检测方法。针对转基因番木瓜GM YK品系外源基因与内源基因结合处序列设计1组特异性引物,利用SYBR Green荧光PCR仪实时监测扩增过程,对反应体系进行优化。用优化后的反应体系检测LAMP方法的灵敏性、特异性,并对市售番木瓜进行检测。LAMP检测方法反应速度快,在60 min内即可完成扩增,检测结果易于观察,通过肉眼观察染色情况即可分辨,该方法灵敏度高,检测限可达到5.78 pg,并且具有良好的特异性。LAMP检测方法可快速、灵敏、特异的检测转基因番木瓜GM YK品系,并适用于基层和现场检测。 相似文献
4.
采用环介导等温扩增技术（loop-mediated isothermal amplification, LAMP）,建立了草莓潜隐环斑病毒（Strawberry latent ringspot virus, SLRSV）检测方法。根据SLRSV外壳蛋白编码基因上的8个位点,共设计了6条引物,通过逆转录环介导等温扩增得到特征性的瀑布状条带。特异性试验表明,引物对SLRSV的检测具有良好的特异性;灵敏度试验显示RT-LAMP的灵敏度比普通RT-PCR高出100倍。该方法无需特殊的试剂和设备,只需在水浴锅中65 ℃等温扩增,整个检测周期约1.5 h,结果采用SYBR green I染色显示,易于观察和判定。 相似文献
5.
《植物检疫》2015,(3)
选择玉米内州萎蔫病菌基因组DNA高度特异保守区域设计环介导等温扩增技术(LAMP)引物,通过对其反应条件优化,建立玉米内州萎蔫病菌的LAMP检测体系。实验得出内引物与外引物最佳比例为6∶1,反应最佳温度为64℃。运用玉米内州萎蔫病菌克隆质粒梯度稀释液对LAMP检测体系的灵敏度进行了验证。LAMP检测体系的检测限达到100 fg,与常规PCR相比,该方法的检测限提高了100倍。以多种参比菌DNA为模板对LAMP检测体系的特异性进行了验证,结果表明LAMP检测体系仅对玉米内州萎蔫病菌有扩增,对非靶标菌没有扩增。为玉米内州萎蔫病菌快速高效检测提供了一种新型的检测方法。 相似文献
6.
7.
南芥菜花叶病毒的RT-LAMP检测试剂盒的研制 总被引：2，自引：2，他引：0
南芥菜花叶病毒(Arabis mosaic virus,ArMV)是我国对外公布的检疫性有害生物,其寄主广泛,极易传播、蔓延[1],因此,加强对该病毒的检测具有重要的意义.目前,针对ArMV的检测方法主要有DAS-ELISA和RT-PCR技术[2].这两种方法在检测周期方面具有明显的优势,且操作简单,但对仪器的依赖性较强.环介导等温扩增技术(loop-mediated isothermal amplification,LAMP)是一种新颖的核酸扩增方法,具有检测速度快、周期短、操作简单和灵敏度高等优点,同时LAMP无需特殊的仪器.本试验对ArMV的LAMP检测试剂盒进行了研制. 相似文献
8.
本文建立了美澳型核果褐腐病菌(Monilinia fructicola)环介导等温扩增技术,并利用此技术开展了M.fructicola的检测和鉴定。采用M.fructicola SCAR分子标记的MO368特异片段为靶标序列,设计并筛选出M.fructicola的特异性LAMP引物,建立了该病菌快速诊断方法。试验结果表明,仅M.fructicola的菌株DNA扩增后呈天蓝色的阳性反应,而在其他真菌的供试菌株中均呈紫色的阴性反应。检测灵敏度可达到100 pg/μL。利用该方法对无锡机场截获的7份疑似李子褐腐病样本进行检测,结果有3份样品呈LAMP阳性反应。本文建立的M.fructicola LAMP检测方法具有灵敏度高、特异性好,简便易行等优点,为美澳型核果褐腐病菌的快速检测提供了一种新技术。 相似文献
9.
10.
11.
香蕉条斑病毒LAMP快速检测方法的建立 总被引：1，自引：0，他引：1
环介导等温扩增（loop-mediated isothermal amplification,LAMP）是一种特异、灵敏、快速的新型基因检测技术。本研究以香蕉条斑病毒（Banana streak virus,BSV）ORF3保守区域为基础针对6个特定区域设计并筛选了4条LAMP扩增引物,通过对LAMP反应中MgSO4、dNTPs、Betaine等主要试剂浓度进行优化,建立了香蕉BSV的LAMP检测方法,63℃反应90 min后通过在反应产物中添加SYBR Green Ⅰ染料后颜色的变化,肉眼即可判断检测结果。LAMP具有极高的检测特异性和灵敏性,其检测下限约为3.2 ng·μL-1,是PCR检测灵敏度的25倍,能快速、准确地对疑似样品进行检测,本研究对华南地区部分疑似样品的检测结果显示LAMP阳性检出率比PCR检出率高。本文建立的BSV LAMP检测方法是对BSV检测方法的拓展和延伸,为香蕉病毒的快速检测提供技术保障。 相似文献
12.
This study reports the development of a loop-mediated isothermal amplification procedure (LAMP) for polymerase chain reaction (PCR)-based detection of 'Candidatus Liberibacter solanacearum', the bacterial causal agent of potato zebra chip (ZC) disease. The 16S rDNA gene of 'Ca. Liberibacter solanacearum' was used to design a set of six primers for LAMP PCR detection of the bacterial pathogen in potato plants and the psyllid vector. The advantage of the LAMP method is that it does not require a thermocycler for amplification or agarose gel electrophoresis for resolution. Positive LAMP results can be visualized directly as a precipitate. The LAMP strategy reported here reliably detected 'Ca. Liberibacter solanacearum' and the closely related species 'Ca. Liberibacter asiaticus', the causative agent of huanglongbing disease of citrus, in plant DNA extracts. Although not as sensitive as quantitative real-time PCR, LAMP detection was equivalent to conventional PCR in tests of ZC-infected potato plants from the field. Thus, the LAMP method shows strong promise as a reliable, rapid, and cost-effective method of detecting 'Ca. Liberibacter' pathogens in psyllids and field-grown potato plants and tubers. 相似文献
13.
以钙黄绿素（calcein）为指示剂,建立了番石榴焦腐病菌（Botryosphaeria rhodina）的环介导等温扩增（Loop mediated isothermal amplification, LAMP）可视化快速检测方法。在该方法中,以番石榴焦腐病菌特异的核糖体转录间隔区（Internal transcribed spacer, ITS）序列为目的DNA片段,设计4条引物（2条内引物、2条外引物）,优化LAMP反应条件和反应体系,并进行特异性和灵敏度验证。研究确定最佳反应温度为64℃,反应时间1 h;特异性检测结果显示,15株不同地理来源的番石榴焦腐病菌和10份番石榴焦腐病病果组织LAMP产物均为阳性（绿色）,而26株其它病原菌及10份健康番石榴果实组织LAMP产物均为阴性（橘黄色）;灵敏度验证结果显示,该方法的检测灵敏度在DNA水平上可达到10 pg。实验结果表明,快速、准确、灵敏的LAMP检测方法适合基层部门及田间检测番石榴焦腐病菌使用。 相似文献
14.
环介导等温扩增技术检测大丽轮枝菌 总被引：1，自引：0，他引：1
本研究基于环介导等温扩增技术(loop-mediated isothermal amplification,LAMP),通过比对分析大丽轮枝菌(Verticillium dahliae)与其相近种不同靶标序列间的差异,选取Gpd(glyceraldehyde-3-phosphate dehydrogenase,甘油醛-3-磷酸脱氢酶)基因作为靶标基因,设计并筛选了四条特异性强、灵敏度高的LAMP引物和两条环引物,建立了一种基于颜色判定的简单、快速和灵敏的大丽轮枝菌的检测方法,并进行了特异性、灵敏度实验及田间发病组织的检测。该方法在62 ℃等温条件下进行核酸扩增反应70 min,扩增前加入染料HNB(羟基萘酚蓝),反应后根据染料颜色变化判定扩增结果。特异性试验中,仅含有大丽轮枝菌菌株DNA的反应管扩增后呈天蓝色的阳性反应,而其他供试菌株均呈紫色的阴性反应。该方法的最低检测限为100 pg·μL-1,在土壤中检测的灵敏度为10个孢子/0.25g土壤。该技术能够检测出棉花发病组织中的目标菌,对采自江苏和山东的24份疑似病害样本进行检测,11份为阳性。该方法的建立为大丽轮枝菌的检测及其所致病害的诊断提供了新的技术。 相似文献
15.
16.
Development of a grower‐conducted inoculum detection assay for management of grape powdery mildew 
下载免费PDF全文
下载免费PDF全文 L. D. Thiessen J. A. Keune T. M. Neill W. W. Turechek G. G. Grove W. F. Mahaffee 《Plant pathology》2016,65(2):238-249
Management of grape powdery mildew (Erysiphe necator) and other polycyclic diseases often relies on calendar‐based pesticide application schedules that assume the presence of inoculum. An inexpensive, loop‐mediated isothermal amplification (LAMP) assay was designed to quickly detect airborne inoculum of E. necator to determine when to initiate a fungicide application programme. Field efficacy was tested in 2010 and 2011 in several commercial and research vineyards in the Willamette Valley of Oregon from pre‐bud break to véraison. In each vineyard, three impaction spore traps were placed adjacent to the trunk. One trap was maintained and used by the grower to conduct the LAMP assay (G‐LAMP) on‐site and the other two traps were used for laboratory‐conducted LAMP (L‐LAMP) and quantitative PCR assay (qPCR). Using the qPCR as a gold standard, L‐LAMP was comparable with qPCR in both years, and G‐LAMP was comparable to qPCR in 2011. Latent class analysis indicated that qPCR had a true positive proportion of 98% in 2010 and 89% in 2011 and true negative proportion of 96% in 2010 and 64% in 2011. An average of 3·3 fewer fungicide applications were used when they were initiated based on spore detection relative to the grower standard practice. There were no significant differences in berry or leaf incidence between plots with fungicides initiated at detection or grower standard practice plots, suggesting that growers using LAMP to initiate fungicide applications can use fewer fungicide applications to manage powdery mildew compared to standard practices. 相似文献
17.
Ralstonia solanacearum is a pathogenic bacterium that causes wilt in over 200 plant species. Here we report a rapid and sensitive detection of R. solanacearum using an isothermal method for copying DNA known as loop-mediated amplification (LAMP). A set of four primers was designed to replicate the gene coding for the flagellar subunit, fliC, and conditions for detection were optimized to complete in 60 min at 65 degrees C. Magnesium pyrophosphate resulting from the amplification reaction could be detected optically as an increase in the solution turbidity, and the DNA products spread in a reproducible ladder-like banding pattern after electrophoresis in an agarose gel. Replication of the fliC gene was detected only from R. solanacearum. The detection limit of this LAMP assay was between 10(4) to 10(6) colony forming units/ml, and the technique may be useful for developing rapid and sensitive detection methods for the R. solanacearum pathogen in soil and water. 相似文献
18.
环介导等温扩增技术快速检测麦根腐平脐蠕孢 总被引：1，自引：0，他引：1
为建立麦根腐平脐蠕孢简单快速的分子检测方法,基于环介导等温扩增(Loop-mediated isothermal amplification, LAMP)技术,以核糖体DNA的ITS为靶标序列,设计和筛选出一组麦根腐平脐蠕孢的特异性引物,成功开发可快速准确检测麦根腐平脐蠕孢的LAMP方法。甜菜碱作用测试显示LAMP体系中是否添加甜菜碱对扩增结果无明显影响;特异性测试显示该LAMP方法能够从14种植物病原菌中特异地检测出麦根腐平脐蠕孢;灵敏度测试显示该LAMP方法的检测极限为10-3 ng·μL-1,是常规PCR检测方法灵敏度的100倍;通用性测试显示该LAMP方法能够准确检测洛阳、安阳、开封和邯郸等不同地理来源的麦根腐平脐蠕孢菌株;发病组织检测显示该LAMP方法能够准确地从人工接种的小麦发病组织中检测出麦根腐平脐蠕孢,检出时间为侵染12 h及以上。这些研究结果表明所建立的麦根腐平脐蠕孢LAMP检测方法特异性好、灵敏度高、适用性强,可用于小麦根腐病的早期快速诊断。 相似文献
19.
Rapid detection of Fusarium oxysporum f. sp. lactucae on soil,lettuce seeds and plants using loop‐mediated isothermal amplification 下载免费PDF全文
下载免费PDF全文 S. Franco Ortega J. Tomlinson G. Gilardi D. Spadaro M. L. Gullino A. Garibaldi N. Boonham 《Plant pathology》2018,67(7):1462-1473
Fusarium oxysporum f. sp. lactucae (FOL) is a soil‐ and seedborne pathogen and the causal agent of fusarium wilt on lettuce. Four races have been identified within FOL, with different worldwide distribution. Several molecular techniques have been used to detect and identify this pathogen; however, not all of them have the optimal characteristics in terms of sensitivity to perform FOL detection in plant and seed material. A loop‐mediated isothermal amplification (LAMP) assay was developed based on the sequence‐characterized amplified region (SCAR) obtained in a previous rapid amplification of polymorphic DNA (RAPD) study. The LAMP assay has been validated according to the EPPO standard PM7/98. The LAMP assay was tested with lettuce seeds, soil and plant material, and can be used successfully to amplify DNA from each of these matrices. In seed lots artificially inoculated with FOL, the detection limit of the LAMP test was 0.004% infected seed. 相似文献