Abstract
Phylogenetically diploid and tetraploid cyprinid fish species have cells of very similar volumes and protein contents. This finding has prompted us to postulate a regulatory system established during the evolution of the tetraploids leading to a diploid state of genic expression. It was proposed that this might be accounted for by a selective loss of ribosomal genes. RNA-DNA hybridization experiments, however, reveal a clear-cut 1:2 relationship of ribosomal DNA amounts between the diploid and the tetraploid species.
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This work was supported by the Deutsche Forschungsgemeinschaft.
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Schmidtke, J., Engel, W. Gene action in fish of tetraploid origin. III. Ribosomal DNA amount in cyprinid fish. Biochem Genet 14, 19–26 (1976). https://doi.org/10.1007/BF00484870
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DOI: https://doi.org/10.1007/BF00484870