草原毛虫(Gynaephora ruergensis Chou et yin)是我国高原牧草中的一种有害害虫。草原毛虫核型多角体病毒新分离株(EupsNPV-Gr)具有典型的杆状病毒特征,呈单粒包埋型病毒粒子,ODV颗粒呈不规则的多边形,直径为1.0μm~1.35μm。EupsNPV-G...草原毛虫(Gynaephora ruergensis Chou et yin)是我国高原牧草中的一种有害害虫。草原毛虫核型多角体病毒新分离株(EupsNPV-Gr)具有典型的杆状病毒特征,呈单粒包埋型病毒粒子,ODV颗粒呈不规则的多边形,直径为1.0μm~1.35μm。EupsNPV-Gr能有效杀灭草原毛虫幼虫,它对草原毛虫的半致死浓度LC_(50)为4×10^(4)PIB/mL,是一种理想的生物防治剂。本研究对第一个EupsNPV-Gr基因组进行了测序和鉴定。EupsNPV-Gr基因组全长140684bp,包含134个开放阅读框。它与茶毛虫核型多角体病毒(EupsNPV)关系最为密切,序列同源性高达99%。系统进化分析表明,EupsNPV-Gr属于杆状病毒科alpha杆状病毒属,根据公认的种属划分标准,EupsNPV-Gr是EupsNPV的一个株系。新报道的基因组为研究该物种毒力的分子机制提供了基础。展开更多
从自然死亡的雀纹天蛾幼虫分离到一株雀纹天蛾核型多角体病毒。通过扫描及切片透射电镜发现,该病毒为单粒包埋型核型多角体病毒,命名为ThjaSNPV(Theretra japonica single nucleopolyhedrovirus)。病毒全基因组重测序后拼接显示,该病毒...从自然死亡的雀纹天蛾幼虫分离到一株雀纹天蛾核型多角体病毒。通过扫描及切片透射电镜发现,该病毒为单粒包埋型核型多角体病毒,命名为ThjaSNPV(Theretra japonica single nucleopolyhedrovirus)。病毒全基因组重测序后拼接显示,该病毒基因组全长134899 bp,GC含量37.28%,与豆天蛾单粒包埋型核型多角体病毒株DZ1基因组序列相似性高达96.24%。ThjaSNPV含有131个开放阅读框(ORF)其中55个为正链基因,76个为负链基因,与宿主同为天蛾科的豆天蛾单粒包埋型核型多角体基因组相比,雀纹天蛾单粒包埋型核型多角体病毒新注释到7个基因:chitin-binding protein(ORF9),ODV-E18(ORF11),lef-11(ORF27),hypothetical protein(ORF41),lef-10(ORF42),pif-6(ORF66),P6.9(ORF88)。ThjaSNPV的DNA光裂酶基因(DNA photolyase,ORF53)中不具有豆天蛾NPV中的1bp碱基的缺失,只编码一个大的完整DNA裂合酶。38个串联的核心基因的进化分析显示雀纹天蛾NPV与Alphabaculovirus group Ⅱ类群聚类在一起,且和豆天蛾NPV最为相似。展开更多
Poyang Lake is the largest inland freshwater lake in China and contains many species of wild birds and waterfowls.We conducted a survey of avian influenza viruses in nine semi-artificial waterfowl farms in Poyang Lake...Poyang Lake is the largest inland freshwater lake in China and contains many species of wild birds and waterfowls.We conducted a survey of avian influenza viruses in nine semi-artificial waterfowl farms in Poyang Lake during January to March of 2010.Out of 1036 cloacal swabs collected,three H3N2 and one H4N6 influenza viruses were isolated from healthy mallards.All the isolates were genetically and phylogenetically characterized.The analysis of putative HA cleavage sites showed that all the four isolates possessed the molecular characteristics(QTRGL for H3N2 viruses,PEKASR for H4N6 virus) of lowly pathogenic avian influenza(LPAI) virus.The phylogenetic analysis of the viral genomes showed that all four virus isolates clustered in the Eurasian clade of influenza viruses.The M gene of the viruses possessed the highest homology with highly pathogenic H5N1 influenza viruses.In addition,co-infection of H3N2 and H4N6 in the same farm was observed.And interestingly,we isolated two subtypes viruses(H3N2 and H4N6) and their progeny virus(H3N2) with evidence of genome reassortment from the same farm,in which the PB1 and PB2 gene segments of H4N6 replaced those of the H3N2 strain.The results of animal infection experiments showed that all the four isolated viruses were lowly pathogenic to chickens and not pathogenic to mice,which was consistent with the results of genetic analysis.展开更多
文摘草原毛虫(Gynaephora ruergensis Chou et yin)是我国高原牧草中的一种有害害虫。草原毛虫核型多角体病毒新分离株(EupsNPV-Gr)具有典型的杆状病毒特征,呈单粒包埋型病毒粒子,ODV颗粒呈不规则的多边形,直径为1.0μm~1.35μm。EupsNPV-Gr能有效杀灭草原毛虫幼虫,它对草原毛虫的半致死浓度LC_(50)为4×10^(4)PIB/mL,是一种理想的生物防治剂。本研究对第一个EupsNPV-Gr基因组进行了测序和鉴定。EupsNPV-Gr基因组全长140684bp,包含134个开放阅读框。它与茶毛虫核型多角体病毒(EupsNPV)关系最为密切,序列同源性高达99%。系统进化分析表明,EupsNPV-Gr属于杆状病毒科alpha杆状病毒属,根据公认的种属划分标准,EupsNPV-Gr是EupsNPV的一个株系。新报道的基因组为研究该物种毒力的分子机制提供了基础。
文摘从自然死亡的雀纹天蛾幼虫分离到一株雀纹天蛾核型多角体病毒。通过扫描及切片透射电镜发现,该病毒为单粒包埋型核型多角体病毒,命名为ThjaSNPV(Theretra japonica single nucleopolyhedrovirus)。病毒全基因组重测序后拼接显示,该病毒基因组全长134899 bp,GC含量37.28%,与豆天蛾单粒包埋型核型多角体病毒株DZ1基因组序列相似性高达96.24%。ThjaSNPV含有131个开放阅读框(ORF)其中55个为正链基因,76个为负链基因,与宿主同为天蛾科的豆天蛾单粒包埋型核型多角体基因组相比,雀纹天蛾单粒包埋型核型多角体病毒新注释到7个基因:chitin-binding protein(ORF9),ODV-E18(ORF11),lef-11(ORF27),hypothetical protein(ORF41),lef-10(ORF42),pif-6(ORF66),P6.9(ORF88)。ThjaSNPV的DNA光裂酶基因(DNA photolyase,ORF53)中不具有豆天蛾NPV中的1bp碱基的缺失,只编码一个大的完整DNA裂合酶。38个串联的核心基因的进化分析显示雀纹天蛾NPV与Alphabaculovirus group Ⅱ类群聚类在一起,且和豆天蛾NPV最为相似。
基金supported by the Ministry of Science and Technology of China(2010CB534005,2007FY210700,2009ZX10004-109)the National Natural Science Foundation of China(30970024,30900060)+2 种基金Hubei Science and Technology Major Projects(2011ZX09401-302)the National R&D Infrastructure and Facility Development Program of China (BSDN2009-10&18)the Chinese Academy of Sciences(KSCX2YW-N-065,KSCX2-YW-R-157,158 and 159,INFO-115-C01-SDB3-01, INFO-115-C01-SDB4-21,IN-FO-115-D02 and IN-FO-115-C01-SDB2-02)
文摘Poyang Lake is the largest inland freshwater lake in China and contains many species of wild birds and waterfowls.We conducted a survey of avian influenza viruses in nine semi-artificial waterfowl farms in Poyang Lake during January to March of 2010.Out of 1036 cloacal swabs collected,three H3N2 and one H4N6 influenza viruses were isolated from healthy mallards.All the isolates were genetically and phylogenetically characterized.The analysis of putative HA cleavage sites showed that all the four isolates possessed the molecular characteristics(QTRGL for H3N2 viruses,PEKASR for H4N6 virus) of lowly pathogenic avian influenza(LPAI) virus.The phylogenetic analysis of the viral genomes showed that all four virus isolates clustered in the Eurasian clade of influenza viruses.The M gene of the viruses possessed the highest homology with highly pathogenic H5N1 influenza viruses.In addition,co-infection of H3N2 and H4N6 in the same farm was observed.And interestingly,we isolated two subtypes viruses(H3N2 and H4N6) and their progeny virus(H3N2) with evidence of genome reassortment from the same farm,in which the PB1 and PB2 gene segments of H4N6 replaced those of the H3N2 strain.The results of animal infection experiments showed that all the four isolated viruses were lowly pathogenic to chickens and not pathogenic to mice,which was consistent with the results of genetic analysis.
