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Karyotypic analysis of the scimitar-horned oryx, Oryx tao (Bovidae, Artiodactyla)

Vilna Maia^I; Sen Pathak^I; Terry L. Blasdel^II; Joseph P. Flanagan^II

^IDepartment of Genetics, The University of Texas M.D. Anderson Hospital and Tumor Institute at Houston, Houston, Texas 77030
^IIHouston Zoological Gardens, Houston, Texas 77030, U.S.A. V.M. was a Visiting Scientist., on leave from Laboratório de Genética, Departamento de Biologia Geral, Universidade Federal de Pernambuco, 50000 Recife, PE, Brasil, Send correspondence to V.M. at the Brazilian address.

ABSTRACT

The diploid chromosome number in the scimitar-horn oryx is 2n = 58. The karyotype consists of acrocentric chromosomes except for a pair of autosomes which is subtelocentric. The X is a large acrocentric and the Y is the smallest-sized acrocentric chromosome. Ag-NOR and R-banding patterns revealed that chromosome Nos. 2, 3, 4 and 5 have NOR in their telomeric ends and that the subtelocentric chromosome is the result of a Robertsonian translocation between chromosomes 1 and 25 of cattle.

Keywords: karyotypic; scimitar-horned; oryx; Oryx tao .

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