Nom du corpus

Corpus Systématique Animale

Titre du document

Comparison between the complete mtDNA sequences of the blue and the fin whale, two species that can hybridize in nature

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Mitochondrial DNA
  • Mitochondrial species differences
  • Molecular phylogeny
  • Cetaceans
  • Whalebone whales
  • Species hybridization
Nom du fichier dans la ressource
Mammiferes_v2b_00982
Auteur(s)
  • Úlfur Árnason 1
  • Anette Gullberg 1
Affiliation(s)
  • 1) Department of Molecular Genetics, University of Lund, The Wallenberg Laboratory, Box 7031, 220 07, Lund, Sweden
Résumé

The sequence of the mitochondrial DNA (mtDNA) molecule of the blue whale (Balaenoptera musculus) was determined. The molecule is 16,402 by long and its organization conforms with that of other eutherian mammals. The molecule was compared with the mtDNA of the congeneric fin whale (B. physalus). It was recently documented that the two species can hybridize and that male offspring are infertile whereas female offspring may be fertile. The present comparison made it possible to determine the degree of mtDNA difference that occurs between two species that are not completely separated by hybridization incompatibility. The difference between the complete mtDNA sequences was 7.4%. Lengths of peptide coding genes were the same in both species. Except for a small portion of the control region, disruption in alignment was usually limited to insertion/deletion of a single nucleotide. Nucleotide differences between peptide coding genes ranged from 7.1 to 10.5%, and difference at the inferred amino acid level was 0.0–7.9%. In the rRNA genes the mean transition difference was 3.8%. This figure is similar in degree to the difference (3.4%) between the 12S rRNA gene of humans and the chimpanzee. The mtDNA differences between the two whale species, involving both peptide coding and rRNA genes, suggest an evolutionary separation of ?5 million years. Although hybridization between more distantly related mammalian species may not be excluded, it is probable that the blue and fin whales are nearly as different in their mtDNA sequences as hybridizing mammal species may be.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - evolutionary biology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Genetics
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Molecular Biology
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - genetics & heredity
  • 1 - science ; 2 - evolutionary biology
  • 1 - science ; 2 - biochemistry & molecular biology
Identifiant ISTEX
FD8D52A58F686734BFC47E3E379DE8AB727D51AA
Revue

Journal of Molecular Evolution

Année de publication
1993
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.94
Sous-corpus
  • Mammiferes
Type de publication
Journal
ark:/67375/1BB-53B1RK9R-5
Powered by Lodex 9.3.8