Molecular Biology and Evolution 18:1892-1904 (2001)
© 2001 Society for Molecular Biology and Evolution
The Complete Sequence of the Mitochondrial Genome of Buteo buteo (Aves, Accipitridae) Indicates an Early Split in the Phylogeny of Raptors
Zoological Department, Museum of Natural History, Vienna, Austria;
Institute of Medical Biology, University of Vienna, Austria
The complete sequence of the mitochondrial (mt) genome of Buteo buteo was determined. Its gene content and nucleotide composition are typical for avian genomes. Due to expanded noncoding sequences, Buteo possesses the longest mt genome sequenced so far (18,674 bp). The gene order comprising the control region and neighboring genes is identical to that of Falco peregrinus, suggesting that the corresponding rearrangement occurred before the falconid/accipitrid split. Phylogenetic analyses performed with the mt sequence of Buteo and nine other mt genomes suggest that for investigations at higher taxonomic levels (e.g., avian orders), concatenated rRNA and tRNA gene sequences are more informative than protein gene sequences with respect to resolution and bootstrap support. Phylogenetic analyses indicate an early split between Accipitridae and Falconidae, which, according to molecular dating of other avian divergence times, can be assumed to have taken place in the late Cretaceous 6583 MYA.
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