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Genetic polymorphism and evolution in parthenogenetic animals: V. Triploid Adoxus obscurus (Coleoptera: Chrysomelidae)

Published online by Cambridge University Press:  14 April 2009

Juhani Lokki ,
Anssi Saura ,
Pekka Lankinen  and
Esko Suomalainen
Juhani Lokki
Affiliation:
Department of Genetics, University of Helsinki, P. Rautatiekatu 13, SF-00100 Helsinki 10 and Department of Genetics, University of Oulu, SF-90100 Oulu 10, Finland
Anssi Saura
Affiliation:
Department of Genetics, University of Helsinki, P. Rautatiekatu 13, SF-00100 Helsinki 10 and Department of Genetics, University of Oulu, SF-90100 Oulu 10, Finland
Pekka Lankinen
Affiliation:
Department of Genetics, University of Helsinki, P. Rautatiekatu 13, SF-00100 Helsinki 10 and Department of Genetics, University of Oulu, SF-90100 Oulu 10, Finland
Esko Suomalainen
Affiliation:
Department of Genetics, University of Helsinki, P. Rautatiekatu 13, SF-00100 Helsinki 10 and Department of Genetics, University of Oulu, SF-90100 Oulu 10, Finland
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Summary

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The genetic variability at 16 enzyme loci in 52 Scandinavian triploid parthenogenetic populations of the beetle Adoxus obscurus has been studied by starch-gel electrophoresis. The overall genotypes of different beetles have been compared with each other and with a sample from a diploid bisexual population from Canada. Eighty per cent of the parthenogenetic beetles have the same overall genotype. The remainder belong to six genotypes, three of which are found in only one population. The variability within and between parthenogenetic populations of A. obscurus is much lower than in other comparable parthenogenetic insects studied by us. This is interpreted to be a consequence of the efficient migration of the genotypes with the highest fitness, leading to a replacement of less-adapted genotypes. A. obscurus is a flying insect, whereas the other parthenogenetic insects studied by us are sluggish flightless forms.

Type
Research Article
Information
Genetics Research , Volume 28 , Issue 1 , August 1976 , pp. 27 - 36
Copyright
Copyright © Cambridge University Press 1976

References

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