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Relationships of Pocket Gopher (Thomomys bottae) Populations of the Lower Colorado River

Relationships of Pocket Gopher (Thomomys bottae) Populations of the Lower Colorado River Abstract Two major genically differentiated geographic segments of Thomomys bottae meet along the lower Colorado River in California and Arizona. Maximum divergence recorded between adjacent populations is as high as 35% of the genome as measured by electrophoretic techniques. There is no detectable gene flow between north-south arranged subspecies on either bank of the river due to physiographic barriers. Indirect gene flow through adjoining populations peripheral to the river in the Salton Basin of California and along the Gila River of Arizona is apparent. Populations on opposite banks are remarkably similar genically, suggesting recency of common origin or occasional movement of individuals across the river. The genic pattern of population relatedness is distinct from that indicated by morphology. The genic data are interpreted as more likely reflecting the history of the populations in question whereas the morphology responds more directly to environmentally mediated selection regimes. This content is only available as a PDF. © 1980 The American Society of Mammalogists http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Mammalogy Oxford University Press

Relationships of Pocket Gopher (Thomomys bottae) Populations of the Lower Colorado River

Smith, Margaret, F.; Patton, James, L.
Journal of Mammalogy , Volume 61 (4) – Dec 19, 1980
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References (14)

Publisher
Oxford University Press
Copyright
© 1980 The American Society of Mammalogists
ISSN
0022-2372
eISSN
1545-1542
DOI
10.2307/1380313
Publisher site
See Article on Publisher Site

Abstract

Abstract Two major genically differentiated geographic segments of Thomomys bottae meet along the lower Colorado River in California and Arizona. Maximum divergence recorded between adjacent populations is as high as 35% of the genome as measured by electrophoretic techniques. There is no detectable gene flow between north-south arranged subspecies on either bank of the river due to physiographic barriers. Indirect gene flow through adjoining populations peripheral to the river in the Salton Basin of California and along the Gila River of Arizona is apparent. Populations on opposite banks are remarkably similar genically, suggesting recency of common origin or occasional movement of individuals across the river. The genic pattern of population relatedness is distinct from that indicated by morphology. The genic data are interpreted as more likely reflecting the history of the populations in question whereas the morphology responds more directly to environmentally mediated selection regimes. This content is only available as a PDF. © 1980 The American Society of Mammalogists

Journal

Journal of Mammalogy – Oxford University Press

Published: Dec 19, 1980

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