Phylogenetic relationships of the North American sturgeons (order Acipenseriformes) based on mitochondrial DNA sequences.
Identifieur interne : 001509 ( Main/Exploration ); précédent : 001508; suivant : 001510Phylogenetic relationships of the North American sturgeons (order Acipenseriformes) based on mitochondrial DNA sequences.
Auteurs : J. Krieger [États-Unis] ; P A Fuerst ; T M CavenderSource :
- Molecular phylogenetics and evolution [ 1055-7903 ] ; 2000.
English descriptors
- KwdEn :
- Animals, Base Sequence, DNA Primers (genetics), DNA, Mitochondrial (genetics), Electron Transport Complex IV (genetics), Evolution, Molecular, Fishes (classification), Fishes (genetics), Genetic Variation, Molecular Sequence Data, North America, Phylogeny, RNA, Ribosomal (genetics), RNA, Transfer, Asp (genetics), RNA, Transfer, Phe (genetics), Species Specificity.
- MESH :
- chemical , genetics : DNA Primers, DNA, Mitochondrial, Electron Transport Complex IV, RNA, Ribosomal, RNA, Transfer, Asp, RNA, Transfer, Phe.
- geographic : North America.
- classification : Fishes.
- genetics : Fishes.
- Animals, Base Sequence, Evolution, Molecular, Genetic Variation, Molecular Sequence Data, Phylogeny, Species Specificity.
Abstract
The evolutionary relationships of the extant species within the order Acipenseriformes are not well understood. Nucleotide sequences of four mitochondrial genes (12S rRNA, COII, tRNA(Phe), and tRNA(Asp) genes) in North American sturgeon and paddlefish were examined to reconstruct a phylogeny. Analysis of the combined gene sequences suggests a basal placement of the paddlefish with regard to the sturgeons. Nucleotide sequences of all four genes for the three Scaphirhynchus species were identical. The position of Scaphirhynchus based on our data was uncertain. Within the genus Acipenser, the two Acipenser oxyrinchus subspecies were very similar in sequence and found to be basal to the remaining Acipenser species examined. Based on our data, Acipenser transmontanus and Acipenser medirostris were sister taxa, as were Acipenser fulvescens and Acipenser brevirostrum. Comparison of our results with hypotheses of sturgeon relationships proposed by previous authors is presented. The sequence data presented here are phylogenetically useful and provide a solid foundation of genetic information for the North American Acipenseriformes that can be expanded to include Eurasian species to provide a global picture of sturgeon evolution.
DOI: 10.1006/mpev.1999.0743
PubMed: 10877940
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en">The evolutionary relationships of the extant species within the order Acipenseriformes are not well understood. Nucleotide sequences of four mitochondrial genes (12S rRNA, COII, tRNA(Phe), and tRNA(Asp) genes) in North American sturgeon and paddlefish were examined to reconstruct a phylogeny. Analysis of the combined gene sequences suggests a basal placement of the paddlefish with regard to the sturgeons. Nucleotide sequences of all four genes for the three Scaphirhynchus species were identical. The position of Scaphirhynchus based on our data was uncertain. Within the genus Acipenser, the two Acipenser oxyrinchus subspecies were very similar in sequence and found to be basal to the remaining Acipenser species examined. Based on our data, Acipenser transmontanus and Acipenser medirostris were sister taxa, as were Acipenser fulvescens and Acipenser brevirostrum. Comparison of our results with hypotheses of sturgeon relationships proposed by previous authors is presented. The sequence data presented here are phylogenetically useful and provide a solid foundation of genetic information for the North American Acipenseriformes that can be expanded to include Eurasian species to provide a global picture of sturgeon evolution.</div>
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