Evolutionary patterns of the mitochondrial genome in the Moorish gecko, Tarentola mauritanica |
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Authors: | C. Rato S. Carranza A. Perera D.J. Harris |
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Affiliation: | 1. CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, 4485‐661 Vairão, Portugal;2. Departamento de Biologia, Faculdade de Ciências da Universidade do Porto, 4099‐002 Porto, Portugal;3. Instituto de Biologia Evolutiva (CSIC-UPF), Passeig Marítim de la Barceloneta, 37‐49, E-08003 Barcelona, Spain |
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Abstract: | A previous study on the evolutionary patterns of Tarentola mauritanica demonstrated that low levels of mitochondrial diversity observed in the European populations relative to nuclear markers were consistent with a selective sweep hypothesis. In order to unravel the mitochondrial evolutionary history in this European population and two other lineages of T. mauritanica (Iberian and North African clades), variation within 22 nearly complete mitogenomes was analyzed. Surprisingly, each clade seems to have a distinct evolutionary history; with both the European and Iberian clades presenting a decrease of polymorphism, which in the former is consistent with departure from neutrality of the mtDNA (positive or background selection), but in the latter seems to be the result of a bottleneck after a population expansion. The pattern exhibited by the North African clade seems to be a consequence of adaptation to certain mtDNA variants by positive selection. |
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Keywords: | Ala, Alanine Asn, Asparagine Asp, Aspartic acid Arg, Arginine ATP6, ATP synthase 6 ATP8, ATP synthase 8 bp, Base pair COXI, Cytochrome c oxidase 1 COXII, Cytochrome c oxidase 2 COXIII, Cytochrome c oxidase 3 Cys, Cysteine CYTB, Cytochrome b dNTP, Deoxyribonucleoside triphosphate Gln, Glutamine Glu, Glutamic acid Gly, Glycine HKA test, Hudson, Kreitman and Aguadé test His, Histidine Ile, Isoleucine Leu, Leucine Lys, Lysine Met, Methionine MgCl2, Magnesium chloride MLHKA, Maximum likelihood version of the HKA test mtDNA, Mitochondrial DNA ND1, NADH dehydrogenase 1 ND2, NADH dehydrogenase 2 ND3, NADH dehydrogenase 3 ND4, NADH dehydrogenase 4 ND4L, NADH-ubiquinone oxidoreductase chain 4L ND5, NADH dehydrogenase 5 ND6, NADH dehydrogenase 6 Numt, Nuclear mitochondrial DNA PCR, Polymerase chain reaction Phe, Phenylalanine Pro, Proline rRNA, Ribosomal RNA Ser, Serine Thr, Threonine tRNA, Transfer RNA genes Trp, Tryptophan Tyr, Tyrosine Val, Valine |
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