烟草黄瓜花叶病毒湖北分离物全基因组序列分析及亚组鉴定  被引量:3

Complete Sequence Analysis and Subgroup Identification of Cucumber mosaic virus from Nicotiana tabacum in Hubei

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作  者:金大伟[1,2] 罗朝鹏[1] 杨军[1] 侯明生[2] 王燃[1] 李锋[1] 魏春阳[1] 武明珠[1] 魏攀[1] 林福呈[1] 

机构地区:[1]中国烟草总公司郑州烟草研究院 [2]华中农业大学植物科技学院,武汉市洪山区狮子山街1号430070

出  处:《烟草科技》2014年第1期80-84,共5页Tobacco Science & Technology

基  金:国家烟草专卖局科技项目和郑州烟草研究院科技项目"烟草主要病毒病分子变异监控及追踪技术研究"(122009CZ0410)

摘  要:为明确我国湖北烟区烟草黄瓜花叶病毒(Cucumber mosaic virus,CMV)的亚组类型,对湖北地区侵染烟草的CMV HB24株系进行基因组全长克隆和序列分析。结果表明,HB24株系RNA1(GenBank序列号:KC019299)全长为3363个核苷酸(nt),编码993个氨基酸的1a蛋白;RNA2(GenBank序列号:KC019300)全长为3049nt,编码859个氨基酸的2a蛋白和111个氨基酸的2b蛋白;RNA3(GenBank序列号:KC019301)全长为2216nt,编码279个氨基酸的3a蛋白和218个氨基酸的CP蛋白。核苷酸序列同源性分析表明,HB24与Fny,SD和Q株系RNA1同源性分别为91.6%,91.1%和75.9%,RNA2同源性分别为91.8%,97.8%和69.5%,RNA3同源性分别为92.1%,93.4%和73.2%;与同属花生矮化病毒(Peanut stunt virus,PSV)ER株系RNA1,RNA2和RNA3的同源性分别为65.5%,56.7%和54.1%,与同属番茄不孕病毒(Tomato aspermy virus,TAV)V株系同源性分别为66.9%,57.7%和51.5%。HB24 RNA3 5′NTR(Nontranslated region)的结构分析以及RNA3 5′NTR和CP基因核苷酸序列系统进化树的分析表明,HB24属于CMV亚组IB。In order to identify the subgroup type of CMV (Cucumber mosaic virus) in Hubei tobacco, CMV HB24 strain was isolated, and the full-length cDNA sequence of genomic RNAs of the isolate was determined by RT-PCR and sequence analysis. The results showed that: HB24 RNA1 (GenBank: KC019299) consisted of 3363 nucleotides (nt) and encoded la protein of 993 amino acid residues (aa), RNA2 (GenBank: KC019300) consisted of 3049 nt and encoded 2a protein of 859 aa and 2b protein of 111 aa, RNA3 (GenBank: KC019301) contained 2216 nt and encoded 3a protein of 279 aa and CP of 218 aa. The results of nucleotide sequence similarity indicated that: the similarities of HB24 RNAs with the RNAs of Fny, SD, Q strains were: RNAI: 91.6%, 91.1%, 75.9%; RNA2: 91.8%, 97.8%, 69.5%; RNA3: 92.1%, 93.4%, 73.2%, respectively. The similarities of HB24 RNAs with the RNAs of PSV-ER (Peanut stunt virus) were RNAI: 65.5%, RNA2: 56.7%, RNA3: 54.1%; and that with the RNAs of TAV-V (Tomato aspermy virus) were 66.9%, 57.7%, 51.5%, respectively. According to RNA3 5' NTR (Nontranslated region) structure analysis, and phylogenetic tree analyses of RNA3 5' NTR and CP gene nucleotide sequences, HB24 belonged in CMV IB subgroup.

关 键 词:黄瓜花叶病毒 基因组 同源性 系统进化树 

分 类 号:S432.41[农业科学—植物病理学]

 

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