| Title |
Marsupials and Eutherians reunited: genetic evidence for the Theria hypothesis of mammalian evolution
|
|---|---|
| Published in |
Mammalian Genome, July 2001
|
| DOI | 10.1007/s003350020026 |
| Pubmed ID | |
| Authors |
J. Keith Killian, Thomas R. Buckley, Niall Stewart, Barry L. Munday, Randy L. Jirtle |
| Abstract |
The three living monophyletic divisions of Class Mammalia are the Prototheria (monotremes), Metatheria (marsupials), and Eutheria ('placental' mammals). Determining the sister relationships among these three groups is the most fundamental question in mammalian evolution. Phylogenetic comparison of these mammals by either anatomy or mitochondrial DNA has resulted in two conflicting hypotheses, Theria and Marsupionta, and has fueled a "genes versus morphology" controversy. We have cloned and analyzed a large nuclear gene, the mannose 6-phosphate/insulin-like growth factor II receptor (M6P/IGF2R), from representatives of all three mammalian groups, including platypus, echidna, opossum, wallaby, hedgehog, mouse, rat, rabbit, cow, pig, bat, tree shrew, colugo, ringtail lemur, and human. Statistical analysis of this nuclear gene unambiguously supports the morphology-based Theria hypothesis that excludes monotremes from a clade of marsupials and eutherians. The M6P/IGF2R was also able to resolve the finer structure of the eutherian mammalian family tree. In particular, our analyses support sister group relationships between lagomorphs and rodents, and between the primates and Dermoptera. Statistical support for the grouping of the hedgehog with Feruungulata and Chiroptera was also strong. |
X Demographics
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Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 97 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Brazil | 5 | 5% |
| Germany | 2 | 2% |
| Chile | 1 | 1% |
| France | 1 | 1% |
| Australia | 1 | 1% |
| Colombia | 1 | 1% |
| United Kingdom | 1 | 1% |
| Argentina | 1 | 1% |
| United States | 1 | 1% |
| Other | 1 | 1% |
| Unknown | 82 | 85% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 18 | 19% |
| Student > Ph. D. Student | 15 | 15% |
| Student > Master | 15 | 15% |
| Student > Doctoral Student | 8 | 8% |
| Professor > Associate Professor | 8 | 8% |
| Other | 21 | 22% |
| Unknown | 12 | 12% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 55 | 57% |
| Earth and Planetary Sciences | 8 | 8% |
| Biochemistry, Genetics and Molecular Biology | 7 | 7% |
| Environmental Science | 7 | 7% |
| Mathematics | 2 | 2% |
| Other | 3 | 3% |
| Unknown | 15 | 15% |
Attention Score in Context
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#3,027,529
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Outputs from Mammalian Genome
#57
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Outputs of similar age
#3,139
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Outputs of similar age from Mammalian Genome
#1
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