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Science 8 February 1980:
Vol. 207. no. 4431, pp. 665 - 667
DOI: 10.1126/science.207.4431.665
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Articles

Genetic Variation in Social Mammals: The Marmot Model

ORLANDO A. SCHWARTZ 1 and KENNETH B. ARMITAGE 2

1 Museum of Natural History, Department of Systematics and Ecology, University of Kansas, Lawrence 66045
2 Division of Biological Sciences, University of Kansas, Lawrence 66045

The social substructure and the distribution of genetic variation among colonies of yellow-bellied marmots, when analyzed as an evolutionary system, suggests that this substructure enhances the intercolony variance and retards the fixation of genetic variation. This result supports a traditional theory of gradual evolution rather than recent theories suggesting accelerated evolution in social mammals.

Submitted on February 12, 1979
Revised on October 15, 1979


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