Abstract
Competitive interactions in complex mixtures of genotypes have rarely been studied despite their obvious importance in both natural and commercial populations. Here, we describe a procedure for the analysis of competition in tripartite mixtures of Drosophila melanogaster genotypes. We have utilised a substitution design coupled with a yield-density regression analysis which describes intra- and inter-genotypic competitive effects in terms of simple linear parameters. The experimental design allows any of the competitors to be considered as the primary or indicator genotype and also incorporates variation in the relative proportions of the two associate competitors. The regression parameters are used to derive estimates of the competitive pressure exerted by each associate on the indicator genotype and also the response or sensitivity of the indicator to the competitive pressure which it faces in mixed culture. The results indicate that the joint pressure exerted by the paired associate genotypes in trioculture is equal to the sum of the individual pressures of those associates. This additive relationship holds for a variety of indicator genotypes isolated from the Texas population and appears to be a general property of Drosophila competition. We identified one indicator genotype which consistently departed from this relationship although additivity of joint pressures could be restored in combination with particular associate genotypes. The possible role of larval interference in the determination of these interactions is discussed.
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Botella, L, Moya, A, Gonzalez, C, and Mensua, J. 1985. Larval stop, delayed development and survival in overcrowded cultures of Drosophila melanogaster: effect of urea and uric acid. J Insect Physiol, 31, 179–185.
Caligari, P D S. 1980. Competitive interactions in Drosophila melanogaster.. I. Monocultures, Heredity, 45, 219–231.
Caligari, P D S, and Mather, K. 1984. Competitive interactions in Drosophila melanogaster. III. Triocultures. Heredity, 52, 255–264.
Caligari, P D S, and Mather, K. 1988. Competitive interactions in Drosophila melanogaster. IV. Chromosome assay. Heredity, 60, 355–366.
De Miranda, J, and Eggleston, P. 1987. A comparison of substitution and addition designs for the analysis of competitive interactions in Drosophila melanogaster.. Heredity, 58, 279–288.
De Wit, C. 1960. On competition. Versl Landbouwk Onderz Ned, 66, 1–82.
Eggleston, P. 1987. The use of genetic markers in the analysis of competitive interactions in Drosophila melanogaster. Genetica, 72, 181–186.
Fisher, R, and Yates, F. 1963. Statistical tables for biological agricultural and medical research. 6th edn, Oliver and Boyd, Edinburgh.
Hemmat, M, and Eggleston, P. 1988a. Competetitive interactions in Drosophila melanogaster: recurrent selection for aggression and response. Heredity, 60, 129–137.
Hemmat, M, and Eggleston, P. 1988b. Competitive Interactions in Drosophila Melanogaster: Genetic Variation for Interference Through Media Conditioning. Heredity, 61, 347–354.
Linney, R, Barnes, B, and Kearsey, M. 1971. Variation for metrical characters in Drosophila populations. Heredity, 27, 163–174.
Mather, K, and Caligari, P D S. 1981. Competitive interactions in Drosophila melanogaster. II. Measurement of competition. Heredity, 46, 239–254.
Mather, K, and Caligari, P D S. 1983. Pressure and response in competitive interactions. Heredity, 51, 435–454.
Moya, A, Gonzalez, C, and Mensua, J L. 1988. Larval Competition in Drosophila melanogaster: frequency dependence of viability. Theor Appl Genet, 75, 366–377.
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Hemmat, M., Eggleston, P. Analysis of competitive interactions in triocultures of Drosophila melanogaster. Heredity 64, 215–222 (1990). https://doi.org/10.1038/hdy.1990.26
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DOI: https://doi.org/10.1038/hdy.1990.26
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