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Regulation of cell size in fish of tetraploid origin

✍ Scribed by SCHMIDTKE, J.; ZENZES, M. T.; DITTES, H.; ENGEL, W.

Book ID
109694933
Publisher
Nature Publishing Group
Year
1975
Tongue
English
Weight
237 KB
Volume
254
Category
Article
ISSN
0028-0836

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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 tha

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In phylogenetically diploid and tetrapIoid Cyprinid fish species, erythrocyte volumes, protein contents, and mean activities of the enzymes LDH, 6PGD, and PGI per cell per active gene locus decline with increasing DNA contents. These findings are assumed to reflect an evolutionary tendency of poIypl

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PhylogeneticalIy tetraploid species of the fish order Isospondyli generally have twice the mean ribosomal gene content as closely related species on the phylogenetically diploid level. Considerable intraspecific variation of rDNA amount was observed. These findings are discussed in view of the hypot

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By use of cell size, protein and hemoglobin content, and enzyme activities as markers, it becomes apparent that in the course of evolution the gene expression of anciently tetraploid fish of the order Ostariophysi was diploidized, but no such regulatory mechanism has evolved in the phylogenetically