New insights into the distribution of polyploid Daphnia: The Holarctic revisited and Argentina explored
It has long been known that polyploid organisms are more prevalent in arctic than in temperate environments. Past explanations for this geographical trend have focused on the role of glacial cycles in generating polyploids and the influence of abiotic factors in favouring polyploidy in the north. In...
Guardado en:
| Publicado: |
2002
|
|---|---|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09621083_v11_n7_p1209_Adamowicz http://hdl.handle.net/20.500.12110/paper_09621083_v11_n7_p1209_Adamowicz |
| Aporte de: |
| id |
paper:paper_09621083_v11_n7_p1209_Adamowicz |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_09621083_v11_n7_p1209_Adamowicz2023-06-08T15:58:00Z New insights into the distribution of polyploid Daphnia: The Holarctic revisited and Argentina explored DNA content Evolution Hybridization Parthenogenesis Zooplankton Argentina (fish) Daphnia Daphnia pulex Invertebrata Pulex cytochrome c oxidase isoenzyme mitochondrial DNA reduced nicotinamide adenine dinucleotide dehydrogenase animal Arctic Argentina article chemistry Daphnia electrophoresis enzymology genetic variability genetics growth, development and aging molecular genetics nucleotide sequence phylogeny polyploidy Animals Arctic Regions Argentina Base Sequence Daphnia DNA, Mitochondrial Electron Transport Complex IV Electrophoresis, Cellulose Acetate Isoenzymes Molecular Sequence Data NADH Dehydrogenase Phylogeny Polyploidy Variation (Genetics) It has long been known that polyploid organisms are more prevalent in arctic than in temperate environments. Past explanations for this geographical trend have focused on the role of glacial cycles in generating polyploids and the influence of abiotic factors in favouring polyploidy in the north. In combination, these mechanisms probably suffice to explain the observed geographical cline in ploidy levels in members of the Daphnia pulex complex in the Holarctic. While only diploid members of the D. pulex complex are found in the temperate regions of North America and Europe, allozyme and DNA quantification analyses indicate that the southern Argentine pulex-complex fauna is dominated by polyploids. Indeed, the present study is the first to document the presence of polyploid members of the D. pulex complex in any temperate climate. The results of phylogeographic analyses suggest that this difference in polyploid distribution between the northern and southern hemispheres is based more on ecological and historical contingencies than direct selection for polyploidy. Specifically, competition with diploid relatives probably limits the lower latitudinal range of polyploids in the north, but appears not to have occurred in Argentina. Because of these differences, the present study provides important insights into the diverse factors that determine the distributions and evolutionary fates of polyploid organisms. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09621083_v11_n7_p1209_Adamowicz http://hdl.handle.net/20.500.12110/paper_09621083_v11_n7_p1209_Adamowicz |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
DNA content Evolution Hybridization Parthenogenesis Zooplankton Argentina (fish) Daphnia Daphnia pulex Invertebrata Pulex cytochrome c oxidase isoenzyme mitochondrial DNA reduced nicotinamide adenine dinucleotide dehydrogenase animal Arctic Argentina article chemistry Daphnia electrophoresis enzymology genetic variability genetics growth, development and aging molecular genetics nucleotide sequence phylogeny polyploidy Animals Arctic Regions Argentina Base Sequence Daphnia DNA, Mitochondrial Electron Transport Complex IV Electrophoresis, Cellulose Acetate Isoenzymes Molecular Sequence Data NADH Dehydrogenase Phylogeny Polyploidy Variation (Genetics) |
| spellingShingle |
DNA content Evolution Hybridization Parthenogenesis Zooplankton Argentina (fish) Daphnia Daphnia pulex Invertebrata Pulex cytochrome c oxidase isoenzyme mitochondrial DNA reduced nicotinamide adenine dinucleotide dehydrogenase animal Arctic Argentina article chemistry Daphnia electrophoresis enzymology genetic variability genetics growth, development and aging molecular genetics nucleotide sequence phylogeny polyploidy Animals Arctic Regions Argentina Base Sequence Daphnia DNA, Mitochondrial Electron Transport Complex IV Electrophoresis, Cellulose Acetate Isoenzymes Molecular Sequence Data NADH Dehydrogenase Phylogeny Polyploidy Variation (Genetics) New insights into the distribution of polyploid Daphnia: The Holarctic revisited and Argentina explored |
| topic_facet |
DNA content Evolution Hybridization Parthenogenesis Zooplankton Argentina (fish) Daphnia Daphnia pulex Invertebrata Pulex cytochrome c oxidase isoenzyme mitochondrial DNA reduced nicotinamide adenine dinucleotide dehydrogenase animal Arctic Argentina article chemistry Daphnia electrophoresis enzymology genetic variability genetics growth, development and aging molecular genetics nucleotide sequence phylogeny polyploidy Animals Arctic Regions Argentina Base Sequence Daphnia DNA, Mitochondrial Electron Transport Complex IV Electrophoresis, Cellulose Acetate Isoenzymes Molecular Sequence Data NADH Dehydrogenase Phylogeny Polyploidy Variation (Genetics) |
| description |
It has long been known that polyploid organisms are more prevalent in arctic than in temperate environments. Past explanations for this geographical trend have focused on the role of glacial cycles in generating polyploids and the influence of abiotic factors in favouring polyploidy in the north. In combination, these mechanisms probably suffice to explain the observed geographical cline in ploidy levels in members of the Daphnia pulex complex in the Holarctic. While only diploid members of the D. pulex complex are found in the temperate regions of North America and Europe, allozyme and DNA quantification analyses indicate that the southern Argentine pulex-complex fauna is dominated by polyploids. Indeed, the present study is the first to document the presence of polyploid members of the D. pulex complex in any temperate climate. The results of phylogeographic analyses suggest that this difference in polyploid distribution between the northern and southern hemispheres is based more on ecological and historical contingencies than direct selection for polyploidy. Specifically, competition with diploid relatives probably limits the lower latitudinal range of polyploids in the north, but appears not to have occurred in Argentina. Because of these differences, the present study provides important insights into the diverse factors that determine the distributions and evolutionary fates of polyploid organisms. |
| title |
New insights into the distribution of polyploid Daphnia: The Holarctic revisited and Argentina explored |
| title_short |
New insights into the distribution of polyploid Daphnia: The Holarctic revisited and Argentina explored |
| title_full |
New insights into the distribution of polyploid Daphnia: The Holarctic revisited and Argentina explored |
| title_fullStr |
New insights into the distribution of polyploid Daphnia: The Holarctic revisited and Argentina explored |
| title_full_unstemmed |
New insights into the distribution of polyploid Daphnia: The Holarctic revisited and Argentina explored |
| title_sort |
new insights into the distribution of polyploid daphnia: the holarctic revisited and argentina explored |
| publishDate |
2002 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09621083_v11_n7_p1209_Adamowicz http://hdl.handle.net/20.500.12110/paper_09621083_v11_n7_p1209_Adamowicz |
| _version_ |
1768542135888379904 |