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Science 16 April 1965:
Vol. 148. no. 3668, pp. 382 - 383
DOI: 10.1126/science.148.3668.382
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Articles

Chromosome Complement: Differences between Equus caballus and Equus przewalskii, Poliakoff

K. Benirschke 1, N. Malouf 1, R. J. Low 1, and H. Heck 2

1 Department of Pathology, Dartmouth Medical School, Hanover, New Hampshire
2 Catskill Game Farm, Catskill, New York

The chromosome number of the domestic horse is 2n = 64; different races have the same complement. The chromosomes of two Przewalski's horses (at Catskill Game Farm, New York), presumably ancestral wild horses from Mongolia, are identical: 2n = 66, with more acrocentric and fewer metacentric elements than the chromosomes of the domestic horse. This apparent difference in karyotype may help resolve the questions of "purity" in the relatively few remaining Przewalski's horses. Moreover, these findings are of interest in relation to the apparent fertility of hybrids between these species.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Horse Domestication and Conservation Genetics of Przewalski's Horse Inferred from Sex Chromosomal and Autosomal Sequences.
A. N. Lau, L. Peng, H. Goto, L. Chemnick, O. A. Ryder, and K. D. Makova (2009)
Mol. Biol. Evol. 26, 199-208
   Abstract »    Full Text »    PDF »
Widespread Origins of Domestic Horse Lineages.
C. Vilà, J. A. Leonard, A. Götherström, S. Marklund, K. Sandberg, K. Lidén, R. K. Wayne, and H. Ellegren (2001)
Science 291, 474-477
   Abstract »    Full Text »
Major Histocompatibility Complex Variation in the Endangered Przewalski's Horse.
P. W. Hedrick, K. M. Parker, E. L. Miller, and P. S. Miller (1999)
Genetics 152, 1701-1710
   Abstract »    Full Text »
Chromosome Complement: A Fertile Hybrid between Equus priewalskii and Equus caballus.
L. Koulischer and S. Frechkop (1966)
Science 151, 93-95
   Abstract »    PDF »


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