中文摘要：

番茄丛矮病毒（ToBSV）是我国进境植物检疫对象，也是进境种子苗木等必检项目。该病毒能侵染番茄、曼陀罗、葡萄、豇豆等20余科120余种植物。该研究根据ToBSV全基因组中p33蛋白基因，设计引物和TaqMan探针，建立了半巢式实时PCR检测ToBSV的新方法。该研究巧妙地融合了巢式PCR和TaqMan探针技术，第二步半巢式一RT-RealtimePCR既进一步放大了第一步检测信号，也是对第一步PCR产物的确认，与单一的巢式PCR或ReMtimePCR等方法相比其检测的准确性、灵敏度更高。该方法检测灵敏度可达50fg／μL植物总RNA。

英文摘要：

Tomato bushy stunt virus（ToBSV）is a plant quarantine object in China ,and it is a required inspection item for the imported grapes and so on.This virus can infect 120 kind of 20 families of plants,such as tomato,Datura stramonium L. ,grape and cowpea.Three nested primers and one TaqMan probe were designed according to the p33 protein gene of the ToBSV ,with which we set up a new method of semi-nested RT-Realtime PCR to detect the ToBSV.The nest-PCR and the probe-detection technique were combined maneuverably in this study.The semi-nested RT-Realtime PCR in the second step can both magnify the sigal and validate the result of the first step ,which can provide a more sensitive and specific detection of the ToBSV.The sensitivitv of the method can reach 50 fg/μL of total plant RNA.