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Science 22 November 2002:
Vol. 298. no. 5598, pp. 1613 - 1616
DOI: 10.1126/science.1076980
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Reports

Ancient DNA Evidence for Old World Origin of New World Dogs

Jennifer A. Leonard,1*dagger Robert K. Wayne,1 Jane Wheeler,2 Raúl Valadez,3 Sonia Guillén,4 Carles Vilà5

Mitochondrial DNA sequences isolated from ancient dog remains from Latin America and Alaska showed that native American dogs originated from multiple Old World lineages of dogs that accompanied late Pleistocene humans across the Bering Strait. One clade of dog sequences was unique to the New World, which is consistent with a period of geographic isolation. This unique clade was absent from a large sample of modern dogs, which implies that European colonists systematically discouraged the breeding of native American dogs.

1 Department of Organismic Biology, Ecology and Evolution, University of California, Los Angeles, CA 90095-1606, USA.
2 CONOPA, Coordinadora de Investigación y Desarrollo de Camélidos, Avenida Fernando Reusche, Mz. M, Lote 4, Pachacamac, Lima 19, Peru.
3 Laboratorio de Paleozoología, Instituto de Investigaciones Antropológicas de la Universidad Nacional Autónoma de México, Circuito Exterior, s/n, Ciudad Universitaria, Delegación Coyoacán, C.P. 04510, México D.F., Mexico.
4 Centro Mallqui, The Bioanthropology Foundation Peru, Avenida A. Márquez 2014, Jesús María - Lima 11, Peru.
5 Department of Evolutionary Biology, Uppsala University, Norbyvägen 18D, S-75236 Uppsala, Sweden.
*   To whom correspondence should be addressed. E-mail: Leonard.Jennifer{at}NMNH.SI.edu.

dagger    Present address: Genetics Program, Department of Systematic Biology, National Museum of Natural History, Smithsonian Institution, 3001 Connecticut Avenue N.W., Washington, DC 20008-0551, USA.

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