Abstract
The evolution of genome size and base composition of DNA from various reptiles has been studied. DNA amount was measured cytophotometrically and GC concentration estimated by thermal denaturation. The Reptilia appear to be a fairly homogeneous group with respect to DNA quantity, although chelonians stand out because of their higher inter- and intrafamilial variability and DNA content. Quantitative DNA variations do not show a single evolutionary trend, but rather seem to have followed different patterns within each group.
The differences in genome size between related species seem to be mainly the result of duplication or loss of DNA sequences characterized by a similar mean denaturation temperature. This agrees with observations of other authors that quantitative variations in reptiles are mainly due to differences in the amount of repetitive DNA.
Several hypotheses on the significance of quantitative DNA variations in reptiles are discussed.
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References
Atkin N. B., Mattison G., Beçak W. & Ohno S., 1965. The comparative DNA content of 19 species of placental mammals, reptiles and birds. Chromosoma 17: 1–10.
Bellaira D. d'A. & Underwood G., 1951. The origin of snakes. Biol. Rev. 26: 193–237.
Bennett A. F. & Dawson W. R., 1976. Metabolism. In: Biology of the Reptilia. C. Gans & W. R. Dawson eds. Academic Press, London, New York, San Francisco. Vol. 5, pp. 127–223.
Bennett M. D., 1971. The duration of meiosis. Proc. R. Soc. B 178: 277–299.
Camp C. L., 1923. Classification of the lizards. Bull. Am. Mus. Nat. Hist. 48: 289–435.
Carroll R. L., 1969. Origin of reptiles. In: Biology of the Reptilia. C. Gans ed. Academic Press. New York and London, Vol. 1, pp. 1–44.
Cavalier-Smith T., 1978. Nuclear volume control by nucleoskeletal DNA, selection for cell volume and cell growth rate, and the solution of the DNA C-value paradox. J. Cell Sci. 34: 247–278.
Clark H. F., Cohen M. M. & Korzon D. T., 1970. Characterization of reptilian cell lines established at incubation temperatures of 23 to 26 degrees. Proc. Soc. exp. Biol. Med. 133: 1039–1047.
Commoner B., 1964. Roles of deoxyribonucleic acid in inheritance. Nature 202: 960–968.
Cuellar R. E., Ford G. A., Briggs W. R. & Thompson W. F., 1978. Application of higher derivative techniques to analysis of the high resolution thermal denaturation prefiles of reassociated repetitive DNA. Proc. natn. Acad. Sci. USA. 75: 6026–6030.
Davidson E. H. & Britton R. J., 1973. Organization, transcription, and regulation in the animal genome. Quart. Rev. Biol. 48: 565–613.
De Lucca F. L., Imaizumi M. T. & Haddad A., 1974. Characterization of ribonucleic acids from the venom glands of Crotalus durissus terrificus (Ophidia, Reptilia) after manual extraction of the venom. Biochem. J. 139: 151–156.
Epplen J. T., Diedrich U., Wagenmann M., Schmidtke J. & Engel W., 1979. Contrasting DNA sequence organisation patterns in sauropsidian genomes. Chromosoma 75: 199–214.
Epplen J. T., Leipold M., Engel W. & Schmidtke J., 1978. DNA sequence organisation in avian genomes. Chromosoma 69: 307–321.
Gabarro J., 1978. Numerical analysis of thermal denaturation of nucleic acids. Analyt. Biochem. 91: 309–322.
Gorman G. C., 1970. Chromosomes and the systematics of the family Teiidae (Sauria, Reptilia). Copeia, 1970: 230–245.
Gorman G. C., 1973. The chromosomes of the Reptilia, a cytotaxonomic interpretation. In: Cytotaxonomy and vertebrate evolution. A. B. Chiarelli & E. Capanna, eds. Academic Press, New York and London, pp. 349–424.
Gorman G. C. & Schochat D., 1972. A taxonomic intepretation of chromosomal and electrophoretic data on the agamid lizards of Israel with notes on some east african species. Herpetologica 28: 106–112.
Grémy F. & Salmon D., 1969. Bases statistiques pour la recherche médicale et biologique. Dunod, Paris.
Grosset L. & Odartchenko N., 1975. Relationships between cell cycle duration, S-period and nuclear DNA content in erythroblasts of four vertebrate species. Cell Tissue Kinet. 8: 81–90.
Hatch F. T. & Mazrimas J. A., 1977. Satellite DNA and cytogenetic evolution. In: Molecular Human Cytogenetics. R. S. Sparkes, D. E. Comings & C. F. Fox, eds. Academic Press, New York and London, pp. 395–414.
Hinegardner R., 1976. Evolution of genome size. In: Molecular evolution. F. J. Ayala. ed. Sinauer, Sunderland. pp. 179–199.
John B. & Miklos G. L., 1979. Functional aspects of satellite DNA and heterochromatin. Int. Rev. Cytol. 58: 1–114.
King M., 1978. A new chromosome form of Hemidactylus frenatus (Dumeril and Bibron). Herpetologica 34: 216–218.
Lewin B., 1974. Gene expression. Vol. 2 Eukaryotic chromosomes. Wiley, London.
Macgregor H. C., 1978. Some trends in the evolution of very large chromosomes. Phil. Trans. R. Soc. B 283: 309–318.
Macgregor H. C. & Klosterman L., 1979. Observations on the cytology of Bipes (Amphisbaenia) with special reference to its lampbrush chromosomes. Chromosoma 72: 67–87.
Mandel M. & Marmur J., 1968. Use of ultraviolet absorbance-temperature profile for determining the guanine plus cytosine content of DNA. Meth. Enzymol. 12B: 195–206.
Marmur J., 1963. A procedure for the isolation of deoxyribonucleic acid from microorganisms. Meth. Enzymol. 6: 726–738.
Matthey R., 1931. Chromosomes de Reptiles, Sauriens, Ophidiens, Chéloniens. L'évolution de la formule chromosomiale chez les Sauriens. Rev. suisse Zool. 38: 117–186.
Matthey R., 1933. Nouvelle contribution à l'étude des chromosomes chez les Sauriens. Rev. suisse Zool. 40: 281–316.
McDowell S. B.jr. & Bogert C. M., 1954. The systematic position of Lanthanotus and the affinities of the anguinomorphan lizards. Bull. Am. Mus. Nat. Hist. 105: 1–142.
Mendelsohn M., 1966. Absorption cytophotometry: comparative methodology for heterogeneous objects, and the two wavelength method. In: Introduction to quantitative cytochemistry. G. L. Wied ed. Academic press, New York and London, pp. 210–214.
Mirsky A. E. & Ris H., 1951. The desoxyribonucleic acid content of animal cells and its evolutionary significance. J. gen. Physiol. 34: 451–462.
Morescalchi A., 1977. Phylogenetic aspects of karyological evidence. In: Major patterns in vertebrate evolution. M. K. Hecht, P. C. Goody & B. M. Hecht eds. Plenum, New York, pp. 149–167.
Ohno S., 1970. Evolution by gene duplication. Springer, Heidelberg.
Ohno S., 1972. So much ‘junk’ DNA in our genome. In: Evolution of genetic systems. H. H. Smith ed., Gordon & Breach, New York, London Paris, pp. 366–370.
Olmo E., 1976. Genome size in some reptiles. J. exp. Zool. 195: 305–310.
Olmo E. & Morescalchi A., 1975. Evolution of the genome and cell sizes in salamanders. Experientia 31: 804–806.
Olmo E. & Morescalchi A., 1978. Genome and cell size in frogs: A comparison with salamanders. Experientia 34: 44–46.
Olmo E. & Odierna G., 1977. Base composition of DNA from some reptiles. J. exp. Zool. 199: 143–148.
Olmo E. & Odierna G., 1980. Chromosomes and DNA in Cordylid lizards. Herpetologica 36: 311–316.
Olmo, E. & Odierna, G., 1981. Relationships between DNA content and cell morphometric parameters in reptiles. Basic appl. Histochem. (in press).
Ray-Chaudury S. P., Singh L. & Sharma T., 1971. Evolution of sex chromosomes and formation of W-chromatin in snakes. Chromosoma 33: 239–251.
Rice N. R., 1972. Change in repeated DNA in evolution. In: Evolution of genetic systems. H. H. Smith ed. Gordon & Breach, New York, London, Paris, pp. 44–79.
Saint-Girons M. C., 1970. Morphology of the circulating blood cells. In: Biology of the Reptilia. C. Gans & T. S. Parsons eds. Academic Press, London and New York. vol. 3: pp. 73–91.
Singh L., 1974. Study of mitotic and meiotic chromosomes in seven species of lizards. Proc. Zool. Soc. Calcutta 27: 57–79.
Soma M., Beçak M. L. & Beçak W., 1975. Estudio comparativo do contenudo de DNA em 12 species de lacertilios. Ciencia e Cultura. 27: 1322–1328.
Stebbins G. L., 1976. Chromosome, DNA and plant evolution. Evolut. Biol. 9: 1–34.
Straus N. A., 1976. Repeated DNA in Eukaryotes. Handbook of Genetics. R. C. King ed. Plenum Press, New York-London. Vol. 5: Molecular genetics, pp. 3–29.
Stock A. D., 1972. Karyological relationships in turtles (Reptilia, Chelonia). Can. J. Genet. Cytol. 14: 859–868.
Szarski H., 1976. Cell size and nuclear DNA content in vertebrates. Int. Rev. Cytol. 44: 93–111.
Vialli M. & Casonato P., 1971. Quantità di acido desossiribonucleico per nucleo e aree nucleari negli eritrociti di Sphenodon punctatus, rettile rincocefalo. Riv. Istochim. norm. patol. 17: 373–380.
White F. N., 1976. Circulation. In: Biology of the Reptilia. C. Gans & W. R. Dawson eds. Academic Press, London, New York, San Francisco, vol. 5: 275–334.
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Olmo, E. Evolution of genome size and DNA base composition in reptiles. Genetica 57, 39–50 (1981). https://doi.org/10.1007/BF00057541
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DOI: https://doi.org/10.1007/BF00057541