1. Phylogeographical pattern of Euplotes nobilii, a protist ciliate with a bipolar biogeographical distribution.
- Author
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Di Giuseppe G, Barbieri M, Vallesi A, Luporini P, and Dini F
- Subjects
- Antarctic Regions, Aquatic Organisms genetics, Arctic Regions, Base Sequence, DNA Transposable Elements genetics, Genetic Variation, Greenland, Mitochondria genetics, Phylogeography, Polymorphism, Single Nucleotide, RNA, Nuclear genetics, RNA, Ribosomal, 16S genetics, Sequence Analysis, DNA, Svalbard, Euplotes genetics, Gene Flow genetics
- Abstract
Nuclear (18S and ITS) and mitochondrial (16S) ribosomal RNA gene sequences were determined from genetically distinct wild-type strains of Antarctic (nine strains), Fuegian (four strains), Greenland (nine strains) and Svalbard (three strains) populations of the marine ciliate, Euplotes nobilii, and analysed for their nucleotide polymorphisms. A close genetic homogeneity was found within and between the Antarctic and Fuegian populations, while more significant levels of genetic differentiation were detected within and between the two Arctic populations, as well as between these populations and the Antarctic/Fuegian ones. The phylogeographical pattern that was derived from these data indicates that gene flow is not limited among Arctic populations; it equally connects the Arctic and Antarctic populations either directly, or through the Fuegian population. This indication reinforces previous evidence from laboratory assays of mating interactions between some of the strains analysed in this work that Southern and Northern polar populations of E. nobilii belong to a unique, panmictic population that substantially share the same gene pool., (© 2013 John Wiley & Sons Ltd.)
- Published
- 2013
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