湖南省怀化地区山羊胰阔盘吸虫线粒体pcox1基因和核糖体18S rRNA基因序列遗传变异研究  

Genetic analysis of mitochondrial pcox1 and ribosomal 18S rRNA genes in Eurytrema pancreaticum isolates from goats in Huaihua City, Hunan Province

作　　者：侯强红[1] 周孝怀 尧国民 李中波 舒鸣 王湘 罗维 HOU Qiang-Hong;ZHOU Xiao-Huai;YAO Guo-Min;LI Zhong-Bo;SHU Ming;WANG Xiang;LUO Wei(Huaihua Vocational and Technical College,Hunan Province,Huaihua 418000,China;Xinhuang County Center of Animal Husbandry and Fishery Affairs,Hunan Province,China)

机构地区：[1]怀化职业技术学院,怀化418000 [2]湖南省怀化市新晃县畜牧水产事务中心

出　　处：《中国血吸虫病防治杂志》2020年第4期380-383,388,共5页Chinese Journal of Schistosomiasis Control

摘　　要：目的了解湖南省怀化地区山羊体内分离的胰阔盘吸虫遗传变异情况。方法应用PCR技术对分离自湖南怀化地区山羊体内的18株胰阔盘吸虫分离株线粒体细胞色素c氧化酶亚基I基因部分序列(pcox1)和核糖体18S rRNA基因进行扩增,对扩增产物进行测序并进行遗传变异和系统发育分析。结果分离自湖南怀化地区山羊体内的18株胰阔盘吸虫分离株pcox1和18S rRNA基因序列长度分别为430 bp和1 857 bp,分别存在14个和35个变异位点,种内遗传差异分别为0~1.4%和0~0.8%;与GenBank数据库中收录的胰阔盘吸虫中国株基因序列同源性最高,分别为99.0%~99.8%和99.5%~99.8%。基于两种基因构建的系统发育树分析结果一致,本研究获得的18株胰阔盘吸虫分离株与GenBank数据库中已知胰阔盘吸虫分离株聚为同一分支,与支睾阔盘吸虫等阔盘属吸虫相隔较近,与其他吸虫所属分支相隔较远。结论湖南省怀化地区山羊源胰阔盘吸虫分离株遗传变异度较低,线粒体pcox1基因和核糖体18S rRNA基因均适合作为羊源胰阔盘吸虫遗传变异研究的分子标记。Objective To investigate the genetic variation of Eurytrema pancreaticum isolated from goats in Huaihua City,Hunan Province.Methods The partial sequence of mitochondrial cytochrome I(pcox1) and ribosomal 18 S rRNA genes were amplified using a PCR assay in E.pancreaticum isolates from goats in Huaihua City,Hunan Province,and the PCR amplification products were sequenced.Then,the gene sequences were subjected to genetic variation and phylogenetic analyses.Results The sequences of the pcoxl and 18 S rRNA genes were 430 bp and 1 857 bp in length in 18 E.pancreaticum isolates from goats in Huaihua City,Hunan Province,and there were 14 and 35 variation sites in pcoxl and 18 S rRNA gene sequences,with intra-species genetic variations of 0 to 1.4% and 0 to 0.8%,respectively.The sequences of pcoxl and 18 S rRNA genes had 99.0% to99.8% and 99.5% to 99.8% homologies with those from E.pancreaticum Chinese strain recorded in the GenBank database.Consistent phylogenetic analysis results were found based on pcoxl and 18 S rRNA genes.The 18 E.pancreaticum isolates from goats in Huaihua City were clustered into a clade with the known E.pancreaticum isolates registered in GenBank,and the clade with these 18 E.pancreaticum isolates was close to the clades with Eurytrema species and far from the clades with other trematodes.Conclusions The E.pancreaticum isolates from goats have a low genetic variation in Huaihua City,Hunan Province.Mitochondrial pcox1 and ribosomal 18 S rRNA genes may serve as molecular markers for the studies on the genetic variation in goat-derived E.pancreaticum.

关 键 词：胰阔盘吸虫 山羊 pcox1基因 18S rRNA基因 遗传变异 怀化地区 

分 类 号：R383.29[医药卫生—医学寄生虫学]