Biology Faculty Articles

Title

The Ancestral Carnivore Karyotype (2n = 38) Lives Today in Ringtails

Document Type

Article

Publication Date

5-2008

Publication Title

Journal of Heredity

ISSN

0022-1503

Volume

99

Issue/No.

3

First Page

241

Last Page

253

Abstract

Chromosome painting was used to investigate the conservation of high-resolution longitudinal 4′,6-diamidino-2-phenylindole (DAPI)/G bands in Carnivore chromosomes. Cat (Felis catus) and raccoon dog (Nyctereutes procyonoides) painting probes were hybridized to the ringtail (Bassaricus astutus), dwarf mongoose (Helogale parvula), and Malagasy civet (Fossa fossa) to identify homologous chromosome elements. The patterns of chromosome segment homology among Carnivore species allowed us to reconstruct and propose the disposition of a high-resolution banded ancestral carnivore karyotype (ACK). Three bi-armed chromosomes consistently found among Caniformia species are represented as 6 homologous acrocentric chromosomes among Feliformia species of Carnivora. However, reexamination of the most basal of Feliformia species, the African palm civet Nandinia, revealed the presence of the 3 heretofore Caniformia bi-armed chromosomes. Because these 3 bi-armed chromosomes are found in both Caniformia and Feliformia lineages, they are presumed ancestral for all Carnivora, suggesting that the ACK chromosome number would be 38, rather than the previously supposed 42. Banded chromosomes of the ACK are used to evaluate the consistency between recently determined molecular phylogenetic relationships and postulated cytogenetic dynamics in the same Carnivore species.

Comments

©The American Genetic Association 2008

ORCID ID

0000-0001-7353-8301

ResearcherID

N-1726-2015

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Peer Reviewed

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