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Phylogeny of Artiodactyla and Cetacea - based on mitochondrial genomes

Ursing, Björn M LU (1998)
Abstract (Swedish)
Popular Abstract in Swedish

Artiodactyla (partåiga hovdjur) är uppdelad i tre underordningar, Suiformes (grisar och flodhästar), Tylopoda (kameler och lamor) och Ruminantia (kor, hjortar, antiloper och giraffer). Studien syftade till att analysera släktskapen mellan de olika underordningarna och ordningen Cetacea (valar) genom att sekvensera mitokondrie DNA och jämföra sekvenserna.



I våra släktskapsstudier är inte flodhästar och grisar närmsta släktingar. Flodhästarna är är mer släkt med valarna än med någon annan grupp däggdjur och grisarna är avlägsna släktingar dessa.



Flodhästarna och valarna är i sin tur tillsammans närmst släkt med idislande hovdjur (kor, hjortar, antiloper och... (More)
Popular Abstract in Swedish

Artiodactyla (partåiga hovdjur) är uppdelad i tre underordningar, Suiformes (grisar och flodhästar), Tylopoda (kameler och lamor) och Ruminantia (kor, hjortar, antiloper och giraffer). Studien syftade till att analysera släktskapen mellan de olika underordningarna och ordningen Cetacea (valar) genom att sekvensera mitokondrie DNA och jämföra sekvenserna.



I våra släktskapsstudier är inte flodhästar och grisar närmsta släktingar. Flodhästarna är är mer släkt med valarna än med någon annan grupp däggdjur och grisarna är avlägsna släktingar dessa.



Flodhästarna och valarna är i sin tur tillsammans närmst släkt med idislande hovdjur (kor, hjortar, antiloper och giraffer). Den tidigaste uppdelningen av de partåiga hovdjuren var mellan grisar, kameler och gruppen som består av idislare, flodhästar och valar. Denna delning skedde omkring 65 millioner år sedan. (Less)
Abstract
Artiodactyla (eved-toed ungulates) and Cetacea (whales) are two mammalian orders that are commonly recognised as sistergroups. Recently it has been suggested that Cetacea originated within Artiodactyla, but the relationships among the different artiodactyl lineages and Cetacea have not been conclusively established. In the present study the mitochondrial genome of the pig (Sus scrofa), the hippopotamus (Hippopotamus amphibius), the alpaca (Lama pacos) and the sperm whale (Physeter macrocephalus) have been analysed. These sequences have been used in phylogenetic analyses together with those of two baleen whales, two ruminants and several other eutherian mammals.



The study is based on the concatenated nucleotide and amino... (More)
Artiodactyla (eved-toed ungulates) and Cetacea (whales) are two mammalian orders that are commonly recognised as sistergroups. Recently it has been suggested that Cetacea originated within Artiodactyla, but the relationships among the different artiodactyl lineages and Cetacea have not been conclusively established. In the present study the mitochondrial genome of the pig (Sus scrofa), the hippopotamus (Hippopotamus amphibius), the alpaca (Lama pacos) and the sperm whale (Physeter macrocephalus) have been analysed. These sequences have been used in phylogenetic analyses together with those of two baleen whales, two ruminants and several other eutherian mammals.



The study is based on the concatenated nucleotide and amino acid sequences (10,554 and 3,518 characters respectively) of all the mitochondrial protein coding genes except NADH6. Analyses on both data sets identified a basal divergence of the recent artiodactyls into Ruminantia (bovids, deers, tragulids and giraffs), Tylopoda (camels and llamas) and Suina (pigs and peccaries). However, the order in which these lineages diverged was not conclusively resolved. A clade of Ruminatia, Hippopotamidae (hippopotamuses) and Cetacea was identified where the sistergroup relationship between Cetacea and Hippopotamidae was well supported, making both Artiodactyla and Suiformes (pigs, peccaries and hippopotamuses) paraphyletic.



Molecular data in conjunction with the palaeontological record have suggested that the primary divergence between recent whales into Odontoceti (toothed whales) and Mysticeti (baleen whales) occured 32-34 million years before present (MYBP). This calibration point suggests that the primary split between Ruminantia, Tylopoda and Suina occured at =65 MYBP, the divergence between Ruminantia and Hippopotamidae/Cetacea at 60 MYBP and the divergence between Hippopotamidae and Cetacea at =55 MYBP. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Prof Beintema, Jaap J.
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Genetics, mitochondrial genome, phylogeny, Artiodactyla, Cetacea, cytogenetics, Genetik, cytogenetik
pages
108 pages
publisher
Department of Genetics, Lund University
defense location
Dept of Genetics auditorium
defense date
1999-01-22 10:00
external identifiers
  • other:ISRN: LUNDBDS/NBGE 1033-001-108 (1999)
ISBN
91-7874-046-0
language
English
LU publication?
yes
id
dbab1b76-42f5-43b4-b906-bc0f75c786f8 (old id 39239)
date added to LUP
2007-08-01 09:52:10
date last changed
2016-09-19 08:45:07
@phdthesis{dbab1b76-42f5-43b4-b906-bc0f75c786f8,
  abstract     = {Artiodactyla (eved-toed ungulates) and Cetacea (whales) are two mammalian orders that are commonly recognised as sistergroups. Recently it has been suggested that Cetacea originated within Artiodactyla, but the relationships among the different artiodactyl lineages and Cetacea have not been conclusively established. In the present study the mitochondrial genome of the pig (Sus scrofa), the hippopotamus (Hippopotamus amphibius), the alpaca (Lama pacos) and the sperm whale (Physeter macrocephalus) have been analysed. These sequences have been used in phylogenetic analyses together with those of two baleen whales, two ruminants and several other eutherian mammals.<br/><br>
<br/><br>
The study is based on the concatenated nucleotide and amino acid sequences (10,554 and 3,518 characters respectively) of all the mitochondrial protein coding genes except NADH6. Analyses on both data sets identified a basal divergence of the recent artiodactyls into Ruminantia (bovids, deers, tragulids and giraffs), Tylopoda (camels and llamas) and Suina (pigs and peccaries). However, the order in which these lineages diverged was not conclusively resolved. A clade of Ruminatia, Hippopotamidae (hippopotamuses) and Cetacea was identified where the sistergroup relationship between Cetacea and Hippopotamidae was well supported, making both Artiodactyla and Suiformes (pigs, peccaries and hippopotamuses) paraphyletic.<br/><br>
<br/><br>
Molecular data in conjunction with the palaeontological record have suggested that the primary divergence between recent whales into Odontoceti (toothed whales) and Mysticeti (baleen whales) occured 32-34 million years before present (MYBP). This calibration point suggests that the primary split between Ruminantia, Tylopoda and Suina occured at =65 MYBP, the divergence between Ruminantia and Hippopotamidae/Cetacea at 60 MYBP and the divergence between Hippopotamidae and Cetacea at =55 MYBP.},
  author       = {Ursing, Björn M},
  isbn         = {91-7874-046-0},
  keyword      = {Genetics,mitochondrial genome,phylogeny,Artiodactyla,Cetacea,cytogenetics,Genetik,cytogenetik},
  language     = {eng},
  pages        = {108},
  publisher    = {Department of Genetics, Lund University},
  school       = {Lund University},
  title        = {Phylogeny of Artiodactyla and Cetacea - based on mitochondrial genomes},
  year         = {1998},
}