共查询到17条相似文献，搜索用时 574 毫秒
1.
两种主要甜樱桃病毒RT-PCR检测方法的改进 总被引：5，自引：2，他引：3
李属坏死环斑病毒(Prunus necrotic ringspot virus,PNRSV)和李矮缩病毒(Prune dwarf virus,PDV)是较为常见且危害严重的两种植物病毒,1992年被我国列为进境检疫危险性有害生物,主要危害李属和蔷薇属植物.反转录-聚合酶链式反应检测法(RT-PCR)因操作简便且灵敏度高而备受青睐.利用该方法已分别从北京怀柔[1-2]及大连地区[3]栽培的桃、樱桃中检测到PNRSV和PDV两种病毒.由于PNRSV和PDV同属雀麦花叶病毒科等轴不稳环斑病毒属,且传播方式相似,往往同时发病.已有的RT-PCR检测方法,一次反转录操作仅能检测一种病毒,耗时长、效率低,急需建立新的RT-PCR检测体系.本试验采用随机六聚体引物进行反转录,对RT-PCR检测方法进行了改进. 相似文献
2.
侵染昆明玫瑰的李坏死环斑病毒的鉴定及其分子检测 总被引：1，自引：0，他引：1
采集昆明地区种植的花叶症状明显的玫瑰样品,运用现代分子生物学技术与常规技术相结合的方法,初步鉴定引起玫瑰花叶病的主要病毒病原为李坏死环斑病毒.该病毒引起玫瑰植株的系统花叶、畸形和皱缩等症状;电镜下病毒粒体为球形,直径为22～23nm;ELISA检测发现该病毒在植株芽、花粉和顶部叶片的浓度最高;同时,根据外壳蛋白的保守区利用Primer 5.0设计该病毒的特异引物,对该病毒进行分子检测,得到450bp的预期DNA片断,并在此基础上,进行了巢式RT-PCR的分子检测,表明巢式RT-PCR的检测能力最强.并通过序列的同源性分析得知该病毒的外壳蛋白与已知PNRSV的同源性为98.0%,进一步证明了该病毒为李坏死环斑病毒. 相似文献
3.
北京月季病原病毒的高通量测序鉴定和RT-PCR检测 总被引：1，自引：1，他引：0
本研究利用高通量测序技术对北京地区的月季染病样品进行了病毒鉴定,通过序列比对和拼接获得了李属坏死环斑病毒(prunus necrotic ringspot virus,PNRSV)、苹果茎沟病毒(apple stem grooving virus,ASGV)、柑橘碎叶病毒(citrus tatter leaf virus,CTLV)、月季黄叶病毒(rose yellow leaf virus,RYLV)、月季黄花叶病毒(rose yellow mosaic virus,RoYMV)、月季潜隐病毒1(rose cryptic virus1,RCV1)和玫瑰黄脉病毒(rose yellow vein virus,RYVV)等7种已知病毒和2种未知病毒的序列信息。分别对PNRSV,ASGV和RYLV园博园分离物的外壳蛋白基因进行系统进化分析,结果表明PNRSV-YBY归属于PV32组,ASGV-YBY归属于Ⅰ组,RYLV-YBY为玫瑰叶畸形病毒(Rosa rugosa leaf distortion virus, RrLDV)的一个新的分离物。对中国农业大学校园、北京植物园、北京动物园和北京园博园的37份样品进行了PNRSV、ASGV和RYLV的RT-PCR检测,检出率分别为41.7%、44.4%和10.8%。本研究初步明确了侵染北京月季的病毒种类和侵染情况,为月季病毒病的检测和防控提供参考。 相似文献
4.
5.
6.
大麦条纹花叶病毒Barley stripe mosaic virus（BSMV）是我国进境植物检疫性有害生物。为提高大麦条纹花叶病毒检测的灵敏度和特异性,缩短检测周期,根据该病毒不同分离株外壳蛋白（coat protein, CP）基因的保守序列设计特异性的引物和探针,建立了BSMV的实时荧光RT-PCR检测方法。结果表明,本检测方法特异性强,对南方菜豆花叶病毒Southern bean mosaic virus（SBMV）、小麦线条花叶病毒Wheat streak mosaic virus（WSMV）、玉米褪绿斑驳病毒Maize chlorotic mottle virus（MCMV）、烟草环斑病毒Tobacco ringspot virus（TRSV）、菜豆荚斑驳病毒Bean pod mottle virus（BPMV）和番茄环斑病毒Tomato ringspot virus（ToRSV）6种病毒均无交叉扩增;且检测方法灵敏度高,对RNA模板的最低检测限达到5×10-4 ng/μL,与双抗体夹心酶联免疫吸附法（DAS-ELISA）和普通RT-PCR相比,本方法的灵敏度分别提高了10倍和100倍。此外,我们利用该方法对12批进口大麦进行检测,发现6批大麦中检出大麦条纹花叶病毒,占比约50%。总之,本研究建立的荧光定量PCR方法具有灵敏度高、特异性强等优点,适合于BSMV的快速检测。 相似文献
7.
侵染肥城桃的病毒和类病毒的分子检测与鉴定 总被引：1，自引：0，他引：1
为明确山东肥城桃种植区桃树上主要存在的病毒和类病毒及其发生情况,采集具有花叶、斑驳和皱缩典型症状的肥城桃样品,提取叶片总RNA后,分别选用桃树上已报道的啤酒花矮化类病毒Hopstuntviroid(HSVd)、桃潜隐花叶类病毒Peach latent mosaic viroid(PLMVd)、苹果褪绿叶斑病毒Apple chlorotic leaf spot virus(ACLSV)、樱桃锉叶病毒Cherry rasp leaf virus(CRLV)、桃花叶病毒Peach mosaic virus(PMV)、李属坏死环斑病毒Prunus necrotic ringspot virus(PNRSV)、李痘病毒Plum pox virus(PPV)、李矮缩病毒Prunus dwarf virus(PDV)、樱桃绿环斑驳病毒Cherry green ring mottle virus(CGRMV)、杏假褪绿叶斑病毒Apricot pseudo-chlorotic leaf spot virus(APCLSV)、李树皮坏死茎纹孔伴随病毒Plum bark necrosis stem pitting-associated virus(PBNSPaV)和小樱桃病毒1号Little cherry virus 1(LchV1)的特异性引物进行RT-PCR检测。PCR结果显示仅HSVd、PLMVd、ACLSV、PNRSV和PBNSPaV的扩增产物中得到了预期大小的目的片段,将目的片段克隆测序后,经NCBI BLAST比对发现,山东肥城桃分离物HSVd、PLMVd、ACLSV、PNRSV和PBNSPaV与GenBank已报道分离物序列一致性均达90%以上。表明山东肥城桃已感染HSVd、PLMVd 2种类病毒和ACLSV、PNRSV、PBNSPaV 3种病毒。 相似文献
8.
9.
10.
11.
近年来，随着我国切花月季（Rosa hybrid）种植面积的不断增加，月季病毒病的发生日趋严重。据笔者调查，平均发病率20％～30％，有的品种如“绿宝石”，发病率超过60％。李坏死环斑病毒（Prunus necrotic ring spot virus，PNRSV）是月季的主要病毒之一。国内对月季病毒病的研究较少。为明确我国切花月季的主要病毒种类，加强对月季种苗质量的监督检测，笔者对侵染月季的PNRSV云南分离物（PNRSV—yunnan）进行了CP基因克隆及序列分析，建立了快速RT—PCR检测技术。 相似文献
12.
B. J. THOMAS 《Plant pathology》1984,33(2):155-160
Symptoms induced in rose by single isolates of the cherry serotype of prunus necrotic ringspot virus (PNRSV) and an apple serotype (apple mosaic virus; ApMV) were characteristically different, and appeared at different times throughout the growing season according to the ambient temperature. These features remained discrete, even in roses infected by both viruses and were shown by immunospecific electron microscopy to be a reliable indication of infection by either virus.
However, cross-protection between the two isolates was not reciprocal; mixed infections were established only when roses were simultaneously graft-inoculated with ApMV and PNRSV, or when PNRSV-infected roses were supei-infected with ApMV. The significance of these results in relation to the possible natural occurrence of mixed infections in rose or of isolates of intermediate serotype is discussed. 相似文献
However, cross-protection between the two isolates was not reciprocal; mixed infections were established only when roses were simultaneously graft-inoculated with ApMV and PNRSV, or when PNRSV-infected roses were supei-infected with ApMV. The significance of these results in relation to the possible natural occurrence of mixed infections in rose or of isolates of intermediate serotype is discussed. 相似文献
13.
我国部分地区樱桃病毒病害初步调查和病原检测 总被引：2，自引：0，他引：2
对山东泰安、辽宁大连和北京的樱桃病毒病发生情况进行调查,发现8个果园/栽培区均有病毒病发生,主要症状为叶片皱缩、畸形、卷叶、花叶、植株矮缩等。采集20份样品,利用12种病毒的引物进行RT-PCR检测。结果表明,在样品中扩增出与樱桃病毒A(Cherry virus A,CVA)、李属坏死环斑病毒(Prunus necrotic ringspot virus,PNRSV),李矮缩病毒(Prune dwarf virus,PDV)、李树皮坏死与茎痘伴随病毒(Plum bark necrosis stem pitting-associated virus,PBNSPaV)、樱桃绿环斑驳病毒(Cherry green ring mottle virus,CGRMV)、樱桃小果病毒-1(Little cherry virus-1,LChV-1)预期大小一致的目的片段;序列分析表明,与GenBank中注册所测的病毒核苷酸序列均具有较高的一致性。其中,大连、泰安和北京样品均检测到CVA;大连和北京样品中检测到PNRSV和PDV;北京样品中检测到PBNSPaV;大连苗木样品枝条中检测到CGRMV和LChV-1。这是在我国樱桃上首次检测到LChV-1。 相似文献
14.
采用RT-PCR对辽西地区采集的45份核果叶片样品进行了李属坏死环斑病毒(PNRSV)的鉴定,其中9份样品为阳性。以阳性样品总RNA为模板,克隆了PNRSV基因组RNA3近全长序列。序列长度在1 612~1 619 bp之间,一致性为93.8%~100%。以本研究获得的9个和Gen Bank登录的42个PNRSV近全长RNA3序列为基础,截取cp基因、mp基因和近全长RNA3序列分别构建系统发育树,三者结果一致:均可将51个PNRSV分离物分为4个组,即PV32、PV96、PE5和本文报道的一个新的PNRSV组,9个辽西分离物分别属于PV32组或PV96组。本研究明确了我国辽西地区PNRSV的遗传多样性,证明了PNRSV基因组RNA3在研究PNRSV遗传多样性中的适用性,同时发现了一个新的PNRSV组,对于PNRSV遗传多样性研究意义重大。 相似文献
15.
ABSTRACT A survey for viruses in rose propagated in Europe resulted in detection of only Prunus necrotic ringspot virus (PNRSV) among seven viruses screened. Four percent of cut-flower roses from different sources were infected with PNRSV. Progression of the disease under greenhouse conditions was very slow, which should make this virus easy to eradicate through sanitary selection. Comparison of the partial coat protein gene sequences for three representative rose isolates indicated that they do not form a distinct phylogenetic group and show close relations to Prunus spp. isolates. However, a comparison of the reactivity of monoclonal antibodies raised against these isolates showed that the most prevalent PNRSV serotype in rose was different from the most prevalent serotype in Prunus spp. All of the 27 rose isolates tested infected P. persica seedlings, whereas three of the four PNRSV isolates tested from Prunus spp. were poorly infectious in Rosa indica plants. These data suggest adaptation of PNRSV isolates from Prunus spp., but not from rose, to their host plants. The test methodologies developed here to evaluate PNRSV pathogenicity in Prunus spp. and rose could also help to screen for resistant genotypes. 相似文献
16.
通过设计特异性引物SQCPF/SQCPR,扩增南瓜花叶病毒(Squash mosaic virus,SqMV)CP基因的保守序列,进行RT-PCR,对扩增得到的特异性片段进行序列测定,测序结果显示扩增产物序列与GenBank中登录的SqMV外壳蛋白基因存在87%～96%的一致性;建立了适用于检测甜瓜种子中南瓜花叶病毒的RT-PCR结合ELISA方法,通过在酶联板的反应孔中直接进行反转录合成cDNA,能扩增到预期大小的DNA条带,且检测灵敏度高于DAS-ELISA方法10倍以上。用建立的RT-PCR结合ELISA方法检测进境甜瓜种子携带的SqMV,在42份样品中检出4份阳性样品。 相似文献
17.
S. Massart Y. Brostaux L. Barbarossa V. César M. Cieslinska O. Dutrecq F. Fonseca R. Guillem A. Laviña A. Olmos S. Steyer T. Wetzel J. Kummert M. H. Jijakli 《European journal of plant pathology / European Foundation for Plant Pathology》2008,122(4):539-547
The operational capacity of a duplex RT-PCR method for simultaneous detection of Prune dwarf virus (PDV) and Prunus necrotic ringspot virus (PNRSV) has been established by nine European laboratories. A total of 576 samples from Prunus trees with known sanitary status, corresponding to 32 samples in two repetitions for each laboratory, were analysed. The
level of sensitivity achieved by the method was 98.3% for PDV and 90.4% for PNRSV. The specificity was 87.4% for PDV and 94.3%
for PNRSV. The unilateral 95% confidence intervals were calculated for all these values. Cohen’s Kappa coefficient of repeatability
and reproducibility of the technique indicated a strong agreement between data. Likelihood ratios were 7.50 (positive) and
0.02 (negative) for PDV. For PNRSV, the positive likelihood ratio was 15.00 while the negative likelihood ratio was 0.11.
In addition, post-test probabilities of infection were calculated to manage the risk associated with the routine use of this
method. This allows an accurate test result interpretation to facilitate the integration of this new technique into a certification
scheme. 相似文献