Summary
Competition experiments between a lac+ prototroph and a lac− auxotroph ofEscherichia coli were conducted by serial transfer procedure on four levels of sugar concentration. Changes of the relative frequencies of both genotypes were followed and the relative fitness was estimated. Fitness was proved to be density-dependent. No explicit dependence of fitness upon genotype frequencies could be detected by the simple method ofKosuda (1981).
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References
Atwood, K. C., L. K. Schneider andF. J. Ryan (1951) Periodic selection inE. coli.Proc. Natl. Acad. Sci. U. S. 37: 146–155.
Ayala, F. J. (1971) Competition between species: Frequency dependence.Science 171: 820–824.
Birch, L. C. (1953) Experimental background to the study of the distribution and abundance of insects. I. The influence of temperature, moisture and food on the innate capacity for increase of three grain beetles.Ecology 34: 698–711.
Birch, L. C. (1955) Selection inDrosophila pseudoobscura in relation to crowding.Evolution 9: 389–399.
Carson, H. L. (1958) Increase in fitness in experimental populations resulting from heterosis.Proc. Natl. Acad. Sci. U. S. 44: 1136–1141.
Dawood, M. M. andM. W. Strickberger (1969) The effect of larval interaction on viability inDrosophila melanogaster. II. Changes in age structure.Genetics 63: 201–211.
Dobzhansky, Th. andN. Spassky (1944) Environmental modification of heterosis inDrosophila pseudoobscura.Proc. Natl. Acad. Sci. U. S. 40: 407–415.
Huang, S. L., M. Singh andK. Kojima (1971) A study of frequency-dependent selection observed in the esterase-6 locus ofDrosophila melanogaster using a conditioned medium method.Genetics 68: 97–104.
Kojima, K. (1971) Is there a constant fitness value for a given genotype? No. !Evolution 25: 281–285.
Kojima, K. andS. L. Huang (1972) Effects of population density on the frequency-dependent selection in the esterase-6 locus ofDrosophila melanogaster.Evolution 26: 313–321.
Kojima, K. andK. M. Yarbrough (1967) Frequency-dependent selection at the esterase-6 locus inDrosophila melanogaster.Proc. Natl. Acad. Sci. U. S. 57: 645–649.
Kosuda, K. (1974) Effects of population density on fitness inEscherichia coli.Jap. J. Genetics 49: 304 (in Japanese)
Kosuda, K. (1981) On the mode of selection inEscherichia coli. I. An experimental evidence for frequency-dependent fitness.Genetica 55: 17–21.
Lewontin, R. C. (1955) The effects of population density and competition on viability ofDrosophila melanogaster.Evolution 9: 27–41.
Lewontin, R. C. andY. Matsuo (1963) Interaction of genotypes determining the viability inDrosophila busckii.Proc. Natl. Acad. Sci. U. S. 49: 182–190.
Morgan, P. (1976) Frequency-dependent selection at two enzyme loci inDrosophila melanogaster.Nature 263: 765–766.
Nassar, R. (1979) Frequency-dependent selection at the Lap locus inDrosophila melanogaster.Genetics 91: 327–338.
Nassar, R., H. J. Muhs andR. D. Cook (1973) Frequency dependent selection at the Payne inversion inDrosophila melanogaster.Evolution 27: 558–564.
Smouse, P. E. andK. Kosuda (1977) The effects of genotypic frequency and population density on fitness differentials inEscherichia coli.Genetics 86: 399–411.
Tobari, Y. N. andK. Kojima (1967) Selective modes associated with inversion karyotypes inDrosophila ananassae. I. Frequency-dependent selection.Genetics 57: 179–188.
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Kosuda, K. On the mode of selection inEscherichia coli . Res Popul Ecol 23, 379–386 (1981). https://doi.org/10.1007/BF02515638
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DOI: https://doi.org/10.1007/BF02515638