Phylogeny of Artiodactyla and Cetacea - based on mitochondrial genomes
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 conclusi...
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Department of Genetics, Lund University
1998
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Online Access: | https://lup.lub.lu.se/record/39239 |
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ftulundlup:oai:lup.lub.lu.se:dbab1b76-42f5-43b4-b906-bc0f75c786f8 2023-05-15T15:37:07+02:00 Phylogeny of Artiodactyla and Cetacea - based on mitochondrial genomes Ursing, Björn M 1998 https://lup.lub.lu.se/record/39239 eng eng Department of Genetics, Lund University https://lup.lub.lu.se/record/39239 urn:isbn:91-7874-046-0 other:ISRN: LUNDBDS/NBGE 1033-001-108 (1999) Genetics mitochondrial genome phylogeny Artiodactyla Cetacea cytogenetics Genetik cytogenetik thesis/doccomp info:eu-repo/semantics/doctoralThesis text 1998 ftulundlup 2023-02-01T23:30:37Z 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. Doctoral or Postdoctoral Thesis baleen whales Physeter macrocephalus Sperm whale toothed whales Lund University Publications (LUP) |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Genetics mitochondrial genome phylogeny Artiodactyla Cetacea cytogenetics Genetik cytogenetik |
spellingShingle |
Genetics mitochondrial genome phylogeny Artiodactyla Cetacea cytogenetics Genetik cytogenetik Ursing, Björn M Phylogeny of Artiodactyla and Cetacea - based on mitochondrial genomes |
topic_facet |
Genetics mitochondrial genome phylogeny Artiodactyla Cetacea cytogenetics Genetik cytogenetik |
description |
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. |
format |
Doctoral or Postdoctoral Thesis |
author |
Ursing, Björn M |
author_facet |
Ursing, Björn M |
author_sort |
Ursing, Björn M |
title |
Phylogeny of Artiodactyla and Cetacea - based on mitochondrial genomes |
title_short |
Phylogeny of Artiodactyla and Cetacea - based on mitochondrial genomes |
title_full |
Phylogeny of Artiodactyla and Cetacea - based on mitochondrial genomes |
title_fullStr |
Phylogeny of Artiodactyla and Cetacea - based on mitochondrial genomes |
title_full_unstemmed |
Phylogeny of Artiodactyla and Cetacea - based on mitochondrial genomes |
title_sort |
phylogeny of artiodactyla and cetacea - based on mitochondrial genomes |
publisher |
Department of Genetics, Lund University |
publishDate |
1998 |
url |
https://lup.lub.lu.se/record/39239 |
genre |
baleen whales Physeter macrocephalus Sperm whale toothed whales |
genre_facet |
baleen whales Physeter macrocephalus Sperm whale toothed whales |
op_relation |
https://lup.lub.lu.se/record/39239 urn:isbn:91-7874-046-0 other:ISRN: LUNDBDS/NBGE 1033-001-108 (1999) |
_version_ |
1766367575926636544 |