Literaturdatenbank
Literaturdatenbank |
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Morafka, D. J., Aguirre-León, G., & Murphy, R. W. (1994). Allozyme differentiation among gopher tortoises (gopherus): conservation genetics and phylogenetic and taxonomic implications. Canadian Journal of Zoology, 72(9), 1665–1671.
Added by: Admin (13 Dec 2009 17:36:45 UTC) |
| Resource type: Journal Article BibTeX citation key: Morafka1994 View all bibliographic details  |
Categories: General Keywords: Genetik = genetics, Gopherus, Gopherus agassizii, Gopherus berlandieri, Gopherus flavomarginatus, Gopherus polyphemus, Schildkröten = turtles + tortoises, Systematik = taxonomy, Testudinidae Creators: Aguirre-León, Morafka, Murphy Collection: Canadian Journal of Zoology |
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Testudinidae Abstract: The genetic diversity among 18 loci within and among four species of gopher tortoises was investigated using horizontal starch gel electrophoresis. Within species variation ranged from 2 to 4% by direct count and from 2 to 8% by Hardy–Weinberg expectation. Of the loci resolved, 11–22% expressed variation. The northern and southern populations of Gopherus flavomarginatus could not be distinguished. No fixed differences were observed between G. agassizii and G. berlandieri, as reflected in a Nei genetic distance of 0.008. These latter species may be little more than allopatric populations of G. agassizii. Differentiation between the two remaining species was not extensive; G. polyphemus was only slightly distinct from G. flavomarginatus, being separated by a Nei genetic distance of only 0.006. The two pairs of species were separated by an average genetic distance of 0.200. The evolutionary rates of divergence were observed to be unequal, especially between G. polyphemus and G. flavomarginatus. The overall genetic similarity suggests a relatively recent age of origin.
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