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Science 12 April 2002:
Vol. 296. no. 5566, pp. 336 - 339
DOI: 10.1126/science.1069878
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Reports
African Pastoralism: Genetic Imprints of Origins and Migrations
Olivier Hanotte,1*
Daniel G. Bradley,2
Joel W. Ochieng,1
Yasmin Verjee,1
Emmeline W. Hill,2
J. Edward O. Rege3
The genetic history of African cattle pastoralism is controversial
and poorly understood. We reveal the genetic signatures of its origins,
secondary movements, and differentiation through the study of 15 microsatellite loci in 50 indigenous cattle breeds spanning the present
cattle distribution in Africa. The earliest cattle originated within
the African continent, but Near East and European genetic influences
are also identified. The initial expansion of African Bos
taurus was likely from a single region of origin. It reached the
southern part of the continent by following an eastern route rather
than a western one. The B. indicus genetic influence shows a
major entry point through the Horn and the East Coast of Africa and two
modes of introgression into the continent.
1 International Livestock Research Institute,
Post Office Box 30709, Nairobi, Kenya,
2 Department
of Genetics, Smurfit Institute, Trinity College, Dublin 2, Ireland.
3 International Livestock Research Institute, Post
Office Box 5689, Addis Ababa, Ethiopia.
*
To whom correspondence should be addressed. E-mail:
o.hanotte{at}cgiar.org
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