Genetic relationship among gill-infecting Myxobolus species (Myxosporea) of cyprinids: molecular evidence of importance of tissue-specificity

Diseases of Aquatic Organisms

Edit Eszterbauer¹ 

关键词: Myxobolus;    Myxosporeans;    Phylogeny;    18S rDNA;    Tissue tropism;    Cyprinids;    Gills;   

DOI  :  10.3354/dao058035

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: The importance of tissue-specificity was studied in Myxobolus spp. infecting the gills of 7 cyprinid species. The 18S rDNA of 10 Myxobolus species was amplified by optimised nested-PCR, resulting in ~1600 bp PCR products.Phylogenetic trees generated by distance matrix and parsimony analyses revealed 4 main groups. Muscle-infecting species all belonged to the same group, while members of 2 gill-infecting groups were clearly distinguishable on the basis oftissue-specificity, and were also recognisable by differences in spore morphology. On the basis of tissue tropism, phylogenetic relationships among the species examined indicate that genetic separation is a more ancient evolutionary feature thanhost-specificity.

【 授权许可】

Unknown