Genetic homogeneity of the Sedgling Nehalennia speciosa (Odonata: Coenagrionidae) indicates a single Würm glacial refugium and trans‐Palaearctic postglacial expansion
Identifieur interne : 000988 ( Main/Exploration ); précédent : 000987; suivant : 000989Genetic homogeneity of the Sedgling Nehalennia speciosa (Odonata: Coenagrionidae) indicates a single Würm glacial refugium and trans‐Palaearctic postglacial expansion
Auteurs : Rafał Bernard [Pologne] ; Markus Heiser [Allemagne] ; Axel Hochkirch [Allemagne] ; Thomas Schmitt [Allemagne]Source :
- Journal of Zoological Systematics and Evolutionary Research [ 0947-5745 ] ; 2011-11.
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Abstract
The phylogeographic structures of taiga species often support the hypothesis of East Palaearctic refugia for these taxa, but the phylogeographic structures of northern temperate and southern boreal bog species are still poorly understood. Therefore, we analysed the genetic diversity and differentiation of a stenotopic damselfly, Nehalennia speciosa, across its trans‐Palaearctic range by means of sequencing two mitochondrial gene fragments, 16S rRNA‐ND1 and cytochrome c oxidase II. Only four single nucleotide polymorphisms were detected over the 1130 sequenced nucleotides. This low genetic diversity and differentiation and thus the lack of phylogeographic structure imply postglacial expansion from a single Würm Ice Age refugium, most likely located in the Far East of Asia, i.e. Manchurian refugium. From here, the species could have colonized large parts of the Palaearctics, including Europe, during the postglacial.
Url:
DOI: 10.1111/j.1439-0469.2011.00630.x
Affiliations:
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Therefore, we analysed the genetic diversity and differentiation of a stenotopic damselfly, Nehalennia speciosa, across its trans‐Palaearctic range by means of sequencing two mitochondrial gene fragments, 16S rRNA‐ND1 and cytochrome c oxidase II. Only four single nucleotide polymorphisms were detected over the 1130 sequenced nucleotides. This low genetic diversity and differentiation and thus the lack of phylogeographic structure imply postglacial expansion from a single Würm Ice Age refugium, most likely located in the Far East of Asia, i.e. Manchurian refugium. 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