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Genetics of plate morphology in an unusual population of threespine sticklebacks (Gasterosteus aculeatus)

Published online by Cambridge University Press:  14 April 2009

John C. Avise
Affiliation:
Department of Zoology, University of Georgia, Athens, Georgia 30602, U.S.A.

Summary

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A collection of Gasterosteus aculeatus from a single locality (Friant) in Madera County, California, contains individuals with low and high lateral plate morphology, and very few intermediates. Electrophoretic evidence on protein similarities at 15 genetic loci is compatible with the thesis that members of these two morphs belong to a single interbreeding population. This thesis is also supported by broods from laboratory crosses between morphs, which segregate for low and high plate counts. Laboratory crosses between Friant fish and those from geographically isolated populations often yield some progeny with intermediate plate counts. The demonstration of significantly different patterns of plate development in intralocality versus interlocality crosses evidences a contrasting genetic basis for plate determination in different populations of sticklebacks.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1976

References

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