ISSN:
1432-1432
Keywords:
Highly repetitive DNA
;
Cetacea
;
Evolutionary rates
;
Molecular phylogeny
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary The common cetacean highly repetitive DNA component was analyzed with respect to its evolution and value for establishing phylogenetic relationships. The repeat length of the component, which is tandemly organized, is ≈ 1750 by in all cetaceans except the delphinids, in which the repeat length is ≈ 1580 bp. The evolution of the component was studied after sequencing the component in different odontocetes representing the Delphinidae (delphinids), Monodontidae (narwhals), and Ziphiidae (beaked whales). The evolution of this component is very slow, and comparisons showed that sequence divergence among species corresponds closely to their generally accepted phylogenetic relationships and that the component evolves in a concerted manner. The phylogenetic information obtained in this study identified the Irrawaddy dolphin (Orcaella brevirostris) as a delphinid and did not support a close relationship of this species with the Monodontidae.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00162969
Permalink
