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The effect of inbreeding on temperature acclimatization in Drosophila subobscura

Published online by Cambridge University Press:  14 April 2009

K. Bowler
Affiliation:
Department of Zoology, St Bartholomew's Hospital Medical College, London, E.C. 1
M. J. Hollingsworth
Affiliation:
Department of Zoology, St Bartholomew's Hospital Medical College, London, E.C. 1
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1. Rates of gain and loss of acclimatization to temperature of males from two inbred lines and the hybrids between them were measured by recording their survival times in dry air at a lethal temperature (34°C).

2. All hybrid males lost acclimatization to temperature more quickly than did inbred males. B/K males gained acclimatization to temperature more quickly than any other group, but the K inbred males gained acclimatization more quickly than did either the K/B males or the B males. In all cases acclimatization is gained more quickly than it is lost.

3. The extent of acclimatization to temperature, as measured by the difference in survival times of 15°C. and 25°C. acclimatized flies in a range of lethal temperatures, was not found to be different in inbreds and hybrids.

4. The results suggest that hybrids can produce the enzymes necessary for acclimatization to temperature more rapidly than inbreds and confirms the hypothesis that hybrids are biochemically more versatile than inbreds.

5. The difference between the rates of gain and loss of acclimatization to temperature suggests that the processes involved in the enzyme changes are temperature dependent.

6. The absence of a difference in the extent of acclimatization to temperature indicates that both inbred and hybrid D. subobscura are capable of producing those enzymes necessary for temperature acclimatization.

7. The high values of the temperature coefficients for heat death indicate that this process involves protein (enzyme) denaturation.

8. An ageing effect was observed in inbred flies.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1965

References

REFERENCES

Bovee, E. C. (1949). Studies on the thermal death of Hyalella azecta. Biol. Bull., Wood's Hole, 96, 123.CrossRefGoogle ScholarPubMed
Dobzhansky, Th. & Levene, H. (1955). Genetics of natural populations. XXIV. Development homeostasis in natural populations of Drosophila pseudoobscura. Genetics, 40, 797.Google Scholar
Fry, F. E. J., Hart, J. S. & Walker, K. F. (1947). Lethal temperature relationships for a sample of young speckled trout, Salvelinus fontinalis. Publ. Ont. Fish. Res. Lab. 66, 9.Google Scholar
Giese, A. C. (1962). Cell Physiology. London: W. B. Saunders.Google Scholar
Haldane, J. B. S. (1948). Symposium sui fattori ecologici e genetici della speciazioni negli animali. Ric. sci. Supp. A. 54.Google Scholar
Heilbrunn, L. V. (1952). An Outline of General Physiology. London: W. B. Saunders.Google Scholar
Kanungo, M. S. & Prosser, C. L. (1959). Physiological adaptation of goldfish to cold and warm water. II. Oxygen consumption of liver homogenates, oxygen consumption and oxidative phosphorylation of liver mitochondria. J. cell. comp. Physiol. 54, 265.CrossRefGoogle Scholar
Lerner, I. M. (1954). Genetic Homeostasis. Edinburgh: Oliver and Boyd.Google Scholar
Maynard Smith, J. (1956). Acclimatization to high temperatures in inbred and outbred Drosophila subobscura. J. Genet. 54, 497.CrossRefGoogle Scholar
Maynard Smith, J. (1957). Temperature tolerance and acclimatization in Drosophila subobscura. J. exp. Biol. 34, 85.CrossRefGoogle Scholar
Maynard Smith, J. (1958). The effects of temperature and of egglaying on the longevity of Drosophila subobscura. J. exp. Biol. 35, 832.CrossRefGoogle Scholar
Maynard Smith, J. (1962). The causes of ageing. Proc. roy. Soc. B, 157, 115.Google Scholar
Maynard Smith, J., Clarke, J. M. & Hollingsworth, M. J. (1955). The expression of hybrid vigour in Drosophila subobscura. Proc. roy. Soc. B, 144, 159.Google Scholar
Neilands, J. B. & Stumpf, P. K. (1955). Outlines of Enzyme Chemistry. New York: J. Wiley.CrossRefGoogle Scholar
Precht, H. (1957). Concepts of temperature adaptation of unchanging reaction systems of cold-blooded animals. In Physiological Adaptation. Washington, D.C.: American Physiological Soc.Google Scholar
Precht, H., Christophersen, J. & Hensel, H. (1955). Temperatur und Leben. Berlin: Springer Verlag.CrossRefGoogle Scholar
Robertson, F. W. & Reeve, E. C. R. (1952). Heterozygosity, environmental variation and heterosis. Nature, Lond., 170, 296.CrossRefGoogle ScholarPubMed
Spoor, W. A. (1955). Loss and gain of heat tolerance by the crayfish. Biol. Bull., Wood's Hole, 108, 77.CrossRefGoogle Scholar
Stangenberg, G. (1955). Der temperaturinfluss auf Lebenprossesse und den Cytochrom C-Gehalt bein Wasserfrosch. Arch. ges. Physiol. 260, 320.CrossRefGoogle Scholar
Suhrmann, R. (1955). Weitere Untersuchungen zur Temperaturadaptation der Sauerstoff-bindung des Blutes von Rana esculenta L. Z. vergl. Physiol. 39, 507.Google Scholar
Thoday, J. M. (1953). Components of fitness. Symp. Soc. exp. Biol. 7, 96.Google Scholar