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The mitochondrial genome of Gyrodactylus derjavinoides (Platyhelminthes: Monogenea) - A mitogenomic approach for Gyrodactylus species and strain identification
Huyse, T.; Buchmann, K.; Littlewood, D.T.J. (2008). The mitochondrial genome of Gyrodactylus derjavinoides (Platyhelminthes: Monogenea) - A mitogenomic approach for Gyrodactylus species and strain identification. Gene 417(1-2): 27-34. dx.doi.org/10.1016/j.gene.2008.03.008
In: Gene. ELSEVIER SCIENCE BV: Tokyo; Oxford; New York; Lausanne; Shannon; Amsterdam. ISSN 0378-1119; e-ISSN 1879-0038
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| Trefwoorden |
Aquaculture
Cell constituents > Chromosomes > Genes
Chemical compounds > Organic compounds > Nucleotides
Identification
Sequences
Gyrodactylidae Cobbold, 1864 [WoRMS]; Gyrodactylus von Nordmann, 1832 [WoRMS]; Gyrodactylus salaris Malmberg, 1957 [WoRMS]; Monogenea [WoRMS]; Platyhelminthes [WoRMS]; Salmonidae Jarocki or Schinz, 1822 [WoRMS]
Marien/Kust; Zoet water |
| Author keywords |
mitochondrial markers; gyrodactylosis; primer design; aquaculture;mitogenomics; Salmo salor |
| Auteurs | | Top |
- Huyse, T.
- Buchmann, K.
- Littlewood, D.T.J.
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| Abstract |
Systematists and evolutionary biologists are constantly on the lookout for new sources of characters to discriminate amongst taxa and estimate interrelationships within and between taxa. Entire mitochondrial genomes provide a wealth of data, both at the nucleotide and amino acid level. Molecular markers are of particular utility when applied to small, morphologically conserved taxa, as is the case for many monogenean ectoparasites of fish. Gyrodactylus species display a considerable degree of anatomical conservatism, complicating diagnostics based solely on morphology, and some are significant pests of wild and cultured fish. Here we sequenced the complete mitochondrial genome of Gyrodactylus derjavinoides Malmberg, Collins, Cunningham & Behiar 2007, one of the most frequently found gyrodactylid species on salmonids in Scandinavia, and compared it with the recently published genomes of Gyrodactylus salaris Malmberg, 1957 and Gyrodactylus thymalli Zitnan 1960. Through comparative sliding window analysis we identified regions of high sequence variability and designed new primer sequences. In total, 6 new primer pairs have been developed, amplifying fragments of cox1, cox3, nad1, nad2, nad4, nad5 and atp6. Together, they amplify regions capturing almost half the nucleotide variability present in the complete mitochondrial genome. These degenerate primers should also work for other Gyrodactylus species parasitizing salmonids. In addition, we developed a multiplex assay that simultaneously amplifies four fragments in a single PCR reaction. Besides the diagnostic value, these fragments can be used for studying the transmission dynamics of Gyrodactylus, providing crucial information for an improved understanding of the spread and epidemiology of these important fish pathogens. |
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