摘要
本实验采用来源于江苏地区的六株不同鸡传染性法氏囊病病毒(Infectious bursal disease virus,IBDV)毒株,应用 RT-PCR 法对 vp2 基因高变区进行了扩增,构建重组质粒 pMD18T- vp2,测序。与有代表性的 IBDV 毒株 VP2 基因高变区序列进行比较分析,以 ClustalX 软件进行序列比对,得到基因序列及氨基酸序列同源性,IBDVY3、P2G、P8G、SZ、Y5 和 W04(6 株)IBDV 与 D6984(荷兰)的同源性达到 99.0%以上,与其它一些超强毒株(very virulent IBDV,vvIBDV)的同源性也达到了 97.8%以上,并在关键氨基酸位点符合 vvIBDV 特征,采用Phylip3.5 软件分析作出进化树,其结果从分子水平说明六个毒株均为 vvIBDV,与欧洲和日本的超强毒株有较近的亲缘关系,而与美洲株的较远,从而为 IBDV 分子流行病学研究和疫苗的研制提供了科学依据。
Hypervariable region of vp2 gene of six different IBDV (Infectious bursal disease virus) isolates, which were isolated from Jiangsu province, was amplified by RT-PCR and sequenced. Furthermore, sequences of six IBDV isolates were analyzed by ClustalX and Phylip3.5. It was suggested that three isolates (Y3, P2G, P8G) were closely related to vvIBDV (very virulent IBDV) strains isolated from China and Europe. Other isolates (SZ, Y5, W04) were very close with Japanese vvIBDV strains. This study laid on foundation for the research of molecular epidemiology and the development of IBDV vaccines.
出处
《中国病毒学》
CSCD
2004年第6期620-623,共4页
Virologica Sinica
基金
国家科技攻关计划项目(2004BA519A11)
