Molecular data have proved useful in the study of microsporidia phylogeny. Previous studies have shown that there are several important differences between phylogenies based on rRNA and morphological data. In the present study, small subunit (SSU) rDNA sequences were obtained from 7 different fish-infecting microsporidia from 4 different genera (Glugea Thélohan, 1891, Loma Morrison and Sprague, 1981, Pleistophora Gurley, 1893, and Spraguea Weissenberg, 1976). The lengths of the SSU rDNA genes in these species were between 1,332 and 1,343 base pairs. Phylogenetic analysis was performed using parsimony, maximum likelihood, and Kimura 2-parameter with neighbor joining. The analyses revealed that the microsporidia could be divided into 3 major groups. With the exception of Nucleospora salmonis Hedrick, Groff, and Baxa, 1991, all the microsporidia infecting fishes occurred in the same group. The analysis showed that Pleistophora mirandellae Vaney and Conte, 1901 and Pleistophora aguillarum Hoshina, 1951 are not species of Pleistophora. Furthermore, the analysis showed that Loma is not a member of Glugeidae Thélohan, 1892.
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February 2000
SYSTEMATICS-PHYLOGENETICS|
February 01 2000
SMALL SUBUNIT RIBOSOMAL DNA PHYLOGENY OF MICROSPORIDIA WITH PARTICULAR REFERENCE TO GENERA THAT INFECT FISH
F. Nilsen
F. Nilsen
Department of Fisheries and Marine Biology, University of Bergen, Bergen High Technology Centre, N-5020 Bergen, Norway
*Present address: Institute of Marine Research, Department of Aquaculture, P.O. Box 1870, N-5024 Bergen-Nordnes, Norway.
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J Parasitol (2000) 86 (1): 128–133.
Citation
F. Nilsen; SMALL SUBUNIT RIBOSOMAL DNA PHYLOGENY OF MICROSPORIDIA WITH PARTICULAR REFERENCE TO GENERA THAT INFECT FISH. J Parasitol 1 February 2000; 86 (1): 128–133. doi: https://doi.org/10.1645/0022-3395(2000)086[0128:SSRDPO]2.0.CO;2
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