首页> 美国卫生研究院文献>Molecular Biology Research Communications >The phylogenetic position of Myxobolus carnaticus (Myxozoa Myxosporea Bivalvulida) infecting gill lamellae of Cirrhinus mrigala (Hamilton 1822) based on 18S rRNA sequence analysis
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The phylogenetic position of Myxobolus carnaticus (Myxozoa Myxosporea Bivalvulida) infecting gill lamellae of Cirrhinus mrigala (Hamilton 1822) based on 18S rRNA sequence analysis

机译:基于18S rRNA序列分析的食蟹曲霉(MixozoaMyxosporeaBivalvulida)的系统发育位置感染了Cirrhinus mrigala(Hamilton1822)的g片。

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摘要

Myxozoans are an economically important group of microscopic parasites best known for the diseases they cause in commercially important fish hosts. The classification of myxosporeans is generally based on the morphology of their myxospores. Without molecular data, it is very difficult to identify new or existing species. DNA sequence information is therefore, a prerequisite to taxonomic and phylogenic studies of myxosporeans. In the present study, a myxozoan parasite, Myxobolus carnaticus, infecting the gill lamellae of mrigal carp, Cirrhinus mrigala, was characterized by the 18S rRNA gene sequence. The DNA sequence of M. carnaticus clustered phylogenetically with other gill infecting Myxobolus spp. of freshwater clades, forming a dichotomy with closely related M. pavlovskii () that infects the gill lamellae epithelium of silver carp, Hypophthalmichthys molitrix with 95% similarity. Evolutionary pair-wise distances among M. carnaticus and other species of myxosporeans indicated high genetic diversity among myxosporeans. The present study demonstrated that tissue tropism, host specificity and habitat play important roles in phylogenetic relationships among myxozoan species.
机译:粘虫动物是一组经济上重要的微观寄生虫,以它们在商业上重要的鱼类宿主中引起的疾病而闻名。粘孢子菌的分类通常基于粘孢子菌的形态。没有分子数据,很难识别新的或现有的物种。因此,DNA序列信息是粘孢子虫的分类学和系统发育研究的前提。在本研究中,以18S rRNA基因序列为特征,对粘虫的寄生虫Myxobolus carnaticus感染了rig鱼Cirrhinus mrigala的g片。 Carnaticus的DNA序列与其他感染Myxobolus spp的g在系统发育上成簇。淡水进化枝,与紧密相关的M. pavlovskii()形成二分法,感染silver鱼的Hy薄片上皮,Hypophthalmichthys molitrix具有95%的相似性。 M. carnaticus和其他种类的粘孢子虫之间的成对进化距离表明粘孢子虫之间的遗传多样性很高。本研究表明,组织嗜性,宿主特异性和生境在粘虫物种之间的系统发育关系中起着重要作用。

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