Molecular evolutionary dynamics of cytochrome b in strepsirrhine primates: the phylogenetic significance of third-position transversions |
| |
Authors: | Yoder AD; Vilgalys R; Ruvolo M |
| |
Institution: | Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, USA. ayoder@worms.cmb.nwu.edu |
| |
Abstract: | DNA sequences of the complete cytochrome b gene are shown to contain robust
phylogenetic signal for the strepsirrhine primates (i.e., lemurs and
lorises). The phylogeny derived from these data conforms to other molecular
studies of strepsirrhine relationships despite the fact that uncorrected
nucleotide distances are high for nearly all intrastrepsirrhine
comparisons, with most in the 15%-20% range. Cytochrome b sequences support
the hypothesis that Malagasy lemuriforms and Afro-Asian lorisiforms each
comprise clades that share a sister- group relationship. A study (Adkins
and Honeycutt 1994) of the cytochrome c oxidase subunit II (COII) gene
placed one Malagasy primate (Daubentonia) at the base of the strepsirrhine
clade, thereby suggesting a diphyletic Lemuriformes. The reanalysis of COII
third- position transversions, either alone or in combination with
cytochrome b third-position transversions, however, yields a tree that is
congruent with phylogenetic hypotheses derived from cytochrome b and other
genetic data sets.
|
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|