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Selection for a threshold character in Drosophila: III. Genetic control of variability in plateaued populations*

Published online by Cambridge University Press:  14 April 2009

B. D. H. Latter
B. D. H. Latter
Affiliation:
Division of Plant Industry, C.S.I.R.O., Canberra, A.C.T., Australia

Summary

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An analysis of populations of Drosophila melanogaster which had ceased to respond to selection for increased scutellar bristle number has disclosed the existence of an overall negative genetic correlation between replicate lines in the frequency of the two major component bristle types, viz. anteriors and posteriors. Negative phenotypic correlations among component bristle sites have also been detected within populations. A model involving competition among sites for the available resources of a particular limiting substrate is therefore proposed. Genetic changes have been effected in exceptional populations which lead either to an increase in the rate of production of the limiting substrate, or to a lowering of the concentration of the substrate necessary for bristle initiation. The allelic substitutions concerned are recessive, and have been described as decanalizing alleles in view of their effects on both bristle number variability and a measure of developmental regulation at individual anterior sites. Genetic variation has also been demonstrated for the mean allocation of resources to each of the four component bristle types, viz. anteriore interstitials, posteriors and apicals. A brief discussion is given of the implications of the model for breeding practice in domestic species.

Type
Research Article
Information
Genetics Research , Volume 15 , Issue 3 , June 1970 , pp. 285 - 300
Copyright
Copyright © Cambridge University Press 1970

References

REFERENCES

Clayton, G. A. & Robertson, A. (1957). An experimental check on quantitative genetical theory. II. The long-term effects of selection. Journal of Genetice 55, 152–170.CrossRefGoogle Scholar
Falconer, D. S. (1960). Introduction to Quantitative Genetics. Edinburgh: Oliver and Boyd.Google Scholar
Fraser, A. S. (1967). Variation of scutellar bristles in Drosophila. XV. Systems of modifiers. Genetics. Princeton 57, 919–934.CrossRefGoogle ScholarPubMed
Hosgood, S. M. W., MacBean, I. T. & Parsons, P. A. (1968). Genetic heterogeneity and accelerated responses to directional selection in Drosophila. Molecular and General Genetics 101, 217–226.CrossRefGoogle ScholarPubMed
Kimura, M. (1957). Some problems of stochastic processes in genetics. Annals of Mathematical Statistics 28, 882–901.CrossRefGoogle Scholar
Latter, B. D. H. (1963). Genetic homeostasis and the theory of canalization. Statistical Genetics and Plant Breeding. (Eds. Hanson, W. D. and Robinson, H. F..) NAS-NRC Pub. 982, 455–467.Google Scholar
Latter, B. D. H. (1964). Selection for a threshold character in Drosophila. I. An analysis of the phenotypic variance on the underlying scale. Genetical Research. Cambridge 5, 198–210.CrossRefGoogle Scholar
Latter, B. D. H. (1966). Selection for a threshold character in Drosophila. II. Homeostatic behaviour on relaxation of selection. Genetical Research. Cambridge 8, 205–218.CrossRefGoogle ScholarPubMed
Latter, B. D. H. (1970). Selection for a threshold character in Drosophila. IV. Chromosomal analysis of plateaued populations (in preparation).Google Scholar
Rendel, J. M. (1963). Correlation between the number of scutellar and abdominal bristles in Drosophila melanogaster. Genetics. Princeton 48, 391–408.CrossRefGoogle ScholarPubMed
Rendel, J. M. (1965). Bristle pattern in scute stocks of Drosophila melanogaster. American Naturalist. Lancaster, Pa. 99, 25–32.CrossRefGoogle Scholar
Rendel, J. M. (1967). Canalisation and Gene Control. London: Academic Press.Google Scholar
Rendel, J. M. (1968). Genetic control of a developmental process. Population Biology and Evolution (Ed. Lewontin, R. C.), pp. 47–66. Syracuse University Press.Google Scholar
Robertson, A. (1960). A theory of limits in artificial selection. Proceedings of the Royal Society. London B 153, 234–249.Google Scholar
Robertson, F. W. (1955). Selection response and the properties of genetic variation. Cold Spring Harbor Symposia on Quantitative Biology 20, 166–177.CrossRefGoogle ScholarPubMed
Robertson, F. W. (1959 a). Studies in quantitative inheritance. XII. Cell size and number in relation to genetic and environmental variation of body size in Drosophila. Genetics. Princeton 44, 869–896.CrossRefGoogle ScholarPubMed
Robertson, F. W. (1959 b). Studies in quantitative inheritance. XIII. Interrelations between genetic behaviour and development in the cellular constitution of the Drosophila wing. Genetics. Princeton 44, 1113–1130.CrossRefGoogle ScholarPubMed
Scowcroft, W. R., Green, M. M. & Latter, B. D. H. (1968). Dosage at the scute locus, and canalisation of anterior and posterior scutellar bristles in Drosophila melanogaster. Genetics. Princeton 60, 373–388.CrossRefGoogle ScholarPubMed
Scowcroft, W. R. & Latter, B. D. H. (1970). Decanalisation of scutellar bristle number in Drosophila. Genetical Research. Cambridge (submitted for publication).Google Scholar
Waddington, C. H. (1952). Canalization of the development of quantitative characters. In Quantitative Inheritance (Ed. Reeve, E. C. R. and Waddington, C. H.), 43–47. London: H.M.S.O.Google Scholar