Abstract
Two distinct experimental designs are commonly employed for the analysis of competitive interactions in genetically heterogeneous mixtures. These are referred to as substitution and addition designs respectively, and either may be used quantitatively to separate the effects of intra- and inter-genotypic competition. The results presented in this paper relate to two characters which measure competitive success in mixed cultures of Drosophila melanogaster, namely the proportion of developing individuals which survive to emerge as adults and the mean weight of those adults. For each of these characters the estimates of intra- and inter-genotypic competitive values obtained from substitution and addition design experiments were equivalent. The implications of this result with respect to the choice of a suitable experimental design and its application to competition in various plant and animal systems are discussed.
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de Miranda, J., Eggleston, P. A comparison of substitution and addition designs for the analysis of competitive interactions in Drosophila melanogaster. Heredity 58, 279–288 (1987). https://doi.org/10.1038/hdy.1987.42
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DOI: https://doi.org/10.1038/hdy.1987.42
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