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Colorado checkerspot butterflies: isolation, neutrality, and the biospecies

Authors: Ehrlich, P. R.; White, R. R.
Year: 1980
Journal: American Naturalist, Vol. 115, pp. 328-341
Publisher: UNKNOWN
DOI: 10.1086/283564
Keywords: ENTOMOLOGY, GENETICS, RMBL, SELECTION

Abstract

Colorado Euphydryas editha populations completely isolated from well-studied West Coast populations for at least 7,000 generations show strong phenetic and, at seven of eight loci, genetic resemblance to them. The patterns of allozyme variation are not compatible with the hypothesis that the observed variation is only a result of mutation and drift. Euphydryas editha appears to be an example of a phenetic species that maintains its coherence because its populations are kept similar by similar selection pressures or by a neutral genetic inertia, not by the unifying effects of gene flow.

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