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The reduction of genic activity in the tetraploid amphibianOdontophrynus americanus is not due to loss of ribosomal DNA

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Summary

Genic activity in tetraploid members of the amphibian speciesOdontophrymus americanus is reduced to that of diploid ones. Loss of ribosomal genes, a mechanism suggested by others as a means of decreasing genetic activity, could be ruled out. The diploids and the tetraploids have almost identical proportions of their genomes complementary to (28s+18s) ribosomal RNA.

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Author notes

  1. W. Beçak

    Present address: Serviço de Genética, Instituto Butantan, São Paulo, Brasil

Authors and Affiliations

  1. Institut für Humangenetik und Anthropologie der Universität, Albertstrasse 11, D-78, Freiburg im Breisgau, Germany

    J. Schmidtke, W. Beçak & W. Engel

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  1. J. Schmidtke
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  2. W. Beçak
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  3. W. Engel
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Schmidtke, J., Beçak, W. & Engel, W. The reduction of genic activity in the tetraploid amphibianOdontophrynus americanus is not due to loss of ribosomal DNA. Experientia 32, 27–28 (1976). https://doi.org/10.1007/BF01932605

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  • DOI: https://doi.org/10.1007/BF01932605

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