MBE Advance Access published online on December 5, 2003
Molecular Biology and Evolution, doi:10.1093/molbev/msh033
Molecular Biology and Evolution © Society for Molecular Biology and Evolution 2003; all rights reserved
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1 Sezione di Bioinformatica e Genomica, - Istituto Tecnologie Biomediche C.N.R. Via Amendola 168/5, 70126 Bari, Italy
* To whom correspondence should be addressed. E-mail: Graziano.Pesole{at}unimi.it.
Analyses of mitochondrial and nuclear gene sequences have often produced different mammalian tree topologies, undermining confidence in the merit of molecular approaches with respect to "traditional" morphological classification. The recent sequencing of the complete mitochondrial genomes of two additional rodents (Spalax judaei and Jaculus jaculus) and one lagomorph (Ochotona princeps) has prompted us to reinvestigate the issue. Using Bayesian phylogenetics, we found phylogenetic relationships between mammalian species highly congruent with previous results based on nuclear genes. Our results show the existence of four primary lineages of placental mammals: Xenarthra, Afrotheria, Laurasiatheria and Euarchontoglires. Relationships between and within these lineages strongly suggest that the gene trees may also be congruent with the underlying species phylogeny. Key Words:
mtDNA, phylogeny, Glires, rodent monophyly
© 2003 Society for Molecular Biology and Evolution
Original Articles
Congruent Mammalian Trees from Mitochondrial and Nuclear Genes Using Bayesian Methods
2 Dipartimento di Scienze Biomolecolari e Biotecnologie, Università di Milano, Via Celoria, 26, 20133 Milano, Italy
3 Laboratoire Paleontologie, Case Courrier 064, Universite Sciences & Techniques, Place E. Bataillon, 34095 Montpellier, France
4 University of Haifa, Mount Carmel, 31905 Haifa, Israel
5 Dipartimento di Biochimica e Biologia Molecolare, Universita' di Bari, Via E. Orabona 4, 70126 Bari, Italy
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