中国畜牧兽医2017，Vol.44Issue(7)：1925-1933,9.DOI:10.16431/j.cnki.1671-7236.2017.07.004
4株NDV流行株的分离鉴定、生物学特性及遗传学特性的研究
Isolation, Identification of Four Newcastle Disease Virus Strains and Study on Their Biological Characteristics and Genetic Characteristics
摘要
Abstract
In order to study the relationship and evolution between the latest Newcastle disease virus (NDV) epidemic strain and the vaccine strain (Mukteswar,La Sota and Clone 30 strains),four NDV epidemic strains were initially isolated and identified from immunized chicken groups in Guangdong,Guangxi and Hainan provinces.Fusion (F) gene and hemaglutinin neuraminidase (HN) gene of four isolated stains were amplified,cloned and sequenced by RT-PCR method,and the homology analysis of amino acid sequences deduced by F and HN genes of NDV and other strains published in GenBank were studied, the phylogenetic tree were build,and the pathogenicity index of each strain (EID50,MDT, ICPI and IVPI) were determined.The results showed that the EID50,MDT,ICPI and IVPI of the HN-08 strain were 10-8.37/0.2 mL,58.5 h,1.78 and 2.45,that of the XX-08 strain were 10-6.50/0.2 mL,75.0 h,1.61 and 2.41,that of the YS-09 strain were 10-7.75/0.2 mL,64.5 h,1.71 and 2.38,and of the LF-09 strain were 10-7.60/0.2 mL,63.8 h,1.84 and 2.38.In this experiment,the similarity of amino acid sequences of F and HN genes was over 95.8% among four strains of NDV isolated from chicken,the similarity of four NDV strains with chicken epidemic strains (GX11/03 and GM strains),vaccine strains (Mukteswar,La Sota and Clone 30 strains) and standard virulent strain (F48E9 strain) were from 96.8% to 98.6%,86.7% to 90.6% and 88.4% to 91.3%,respectively.The results showed that four NDV epidemic strains were virulent strains,which were closely related to the GX11/03 and GM strains that were popular in China in recent years,but relatively far from the traditional vaccine strains.关键词
新城疫病毒/F基因/HN基因/遗传进化分析Key words
Newcastle disease virus/fusion (F) gene/hemaglutinin neuraminidase (HN) gene/phylogenetic analysis分类
农业科技引用本文复制引用
李晓文,刘佑明,梁国智,梅敏敏,黄雯晶,李文锋,黄淑坚,李智丽..4株NDV流行株的分离鉴定、生物学特性及遗传学特性的研究[J].中国畜牧兽医,2017,44(7):1925-1933,9.基金项目
广东省家禽重大传染病控制技术研究(2012A020100001) （2012A020100001）
