Banding studies on six killer whales: an account of C-band polymorphism and G-band patterns.

Abstract

The karyotypes of six killer whales were studied by banding techniques. A striking accumulation of C-heterochromatin has occurred in the Oricinus karyotype. The four telocentric pairs characteristic of the 2n = 44 cetacean karyotypes have become masked due to the accumulation of heterochromatin in the short arms. Conspicuous C-band polymorphism occurred in the materials studied, rendering each specimen karyotypically unique. Owing to the amount and variation of C-heterochromatin in the Orcinus karyotype, access to C-banded karyotypes was essential for the evaluation of the G-band pattern. The G-band pattern of Orcinus was found to be closely similar to that of Stenella. The results indicate an evolution of the Orcinus karyotype from the karyotypes characterizing other delphinids.

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@article{rnason1980BandingSO, title={Banding studies on six killer whales: an account of C-band polymorphism and G-band patterns.}, author={{\'U}lfur {\'A}rnason and Roger Lutley and Benjamin Vikj{\ae}r Sandholt}, journal={Cytogenetics and cell genetics}, year={1980}, volume={28 1-2}, pages={71-8} }