Population expansion in the North African Late Pleistocene signalled by mitochondrial DNA haplogroup U6

The percid genus Stizostedion consists of five species, three in Europe and two in North America, and is believed to have evolved in Europe and then later colonized North America. Three hypotheses exist concerning the route and timing of this colonization: a Miocene Atlantic "riverine" route; a Pliocene Beringian route; and a late-Pleistocene Atlantic route. To test these hypotheses, allozyme and mitochondrial DNA variation were compared in three Stizostedion species, S. canadense and S. vitreum from North America, and S. lucioperca from Europe, to determine their genetic relatedness. Divergence times between S. canadense and S. vitreum were estimated as 3.12 ± 1.33 million years before present (MYBP) from allozyme data and 4.06 ± 0.73 MYBP for mtDNA data, while divergence times between the North American species and S. lucioperca were 10.59 ± 2.74 MYBP and 7.86 ± 1.18 MYBP, respectively. These results are concordant with the hypothesis that colonization of North America by Stizostedion occurred during the Pliocene via Beringia.

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Contrasting demographic histories of European and North American sea lamprey (Petromyzon marinus) populations inferred from mitochondrial DNA sequence variation

Marine and Freshwater Research ◽

10.1071/mf12062 ◽

2012 ◽

Vol 63 (9) ◽

pp. 827 ◽

Cited By ~ 9

Author(s):

Martin J. Genner ◽

Robert Hillman ◽

Matthew McHugh ◽

Stephen J. Hawkins ◽

Martyn C. Lucas

Keyword(s):

Mitochondrial Dna ◽

Dna Sequences ◽

North American ◽

Petromyzon Marinus ◽

Population Expansion ◽

Sea Lamprey ◽

European Population ◽

North American Population ◽

American Population ◽

The North

Populations of anadromous sea lamprey (Petromyzon marinus) have been found to be largely genetically homogeneous across western Europe, and across the eastern seaboard of North America. However, comparatively little is known of the relationship between the European and North American populations. We quantified the extent of population structuring present over a transatlantic scale using mitochondrial DNA sequences. We found clear segregation of the populations on either side of the Atlantic, and considerable genetic homogeneity within Europe over a spatial scale of over 2000 km. The North American populations contained larger genetic diversity than those from Europe, and coalescent analyses showed a corresponding greater overall effective population size. Employing calibration points based on a dated phylogeny of the Petromyzontiformes, our analyses indicated that the North American population has been increasing in effective size since establishment ~500 000 years ago, while the total European population has only undergone population expansion only within the last 125 000 years. This evidence is consistent with a colonisation of Europe from an older North American population, and with the European population persisting through the last glaciation within regional refugia.

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Mitochondrial DNA evidence for late Pleistocene population expansion of the white catfish, Ameiurus catus

Biochemical Systematics and Ecology ◽

10.1016/j.bse.2012.02.011 ◽

2012 ◽

Vol 42 ◽

pp. 94-98 ◽

Cited By ~ 1

Author(s):

Abinash Padhi

Keyword(s):

Mitochondrial Dna ◽

Late Pleistocene ◽

Population Expansion ◽

Dna Evidence

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An isolated population of Podarcis vaucheri (Sauria: Lacertidae) in south-eastern Spain: genetic data suggest human-mediated range expansion

Amphibia-Reptilia ◽

10.1163/156853810791069074 ◽

2010 ◽

Vol 31 (2) ◽

pp. 287-293 ◽

Cited By ~ 3

Author(s):

Menad Beddek ◽

Julien Renoult ◽

Philippe Geniez ◽

Pierre-André Crochet

Keyword(s):

Mitochondrial Dna ◽

Phenotypic Plasticity ◽

Genetic Data ◽

Isolated Population ◽

African Origin ◽

North African ◽

Dna Analyses ◽

The North ◽

North African Origin ◽

Phenotypic Convergence

AbstractIn this study, we investigate the identity and origin of a population of Iberian Wall Lizards (Podarcis hispanicus complex) that we recently discovered inside the distribution range of the nominotypical form P. hispanicus. In the field, these animals were clearly identified as different from this species but their identity remained problematic. Using morphological and mitochondrial DNA analyses, we here identify this population as P. vaucheri, which constitutes a significant range extension for this species. Molecular results suggest a North African origin to this population. However, according to morphological results, these individuals are closer to the Spanish morphotype than to the North African morphotypes of P. vaucheri. Taken together, these results suggest a human-mediated introduction as the origin of this population, with local adaptation or phenotypic plasticity responsible of phenotypic convergence.

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