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The genus that contains two domesticated species: E. caballus, the horse (2N = 64), and E. asinus, the donkey (2N = 62). E. przewalskii, the Asiatic wild horse or taki (2N = 66), can produce fertile hybrids with domesticated horses. The species name comes from Nikolai Przewalski, the Russian naturalist who described takis in 1883. Takis are descendants of the horses like those shown in the ancient cave paintings of Lascaux, France. About 50 genes have been mapped for E. caballus. See horse (for a listing of breeds), horse-donkey hybrids.

Subjects: Genetics and Genomics.

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