Genetic polymorphism and evolution in parthenogenetic animals. XIII. Changes in the degree of polyploidy in Curculionidae.

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Tetraploid and pentaploid individuals of Catapionus gracilicornis from Temma, Aomori Prefecture as well as triploid and hexaploid individuals of Blosyrus japonicus from Ishiyama-rikkyo, Hokkaido, have been assayed by starch gel electrophoresis. All weevils were parthenogenetic females. There was some variation within parthenogenetic populations. On the other hand, different degrees of polyploidy within a species were identical over all but one enzyme locus assayed. This is taken as further evidence to support the hypothesis of Suomalainen, advanced by Takenouchi, that different degrees of polyploidy in parthenogenetic weevils originate at abnormalities in spindle orientation.
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