Summary
Artificial directional selection for increased sternopleural chaetae number in Drosophila melanogaster is compared with a mode of directional selection which incorporates an element of disruptive selection. Compared with directional selection, this directional-disruptive selection results in a similar response but with a lower selection differential, and higher realised heritability. The differences might be attributed to a higher genetic variance maintained by the directional-disruptive selection.
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Yousif, M., Skibinski, D. Directional-disruptive selection in Drosophila melanogaster. Heredity 49, 71–79 (1982). https://doi.org/10.1038/hdy.1982.66
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DOI: https://doi.org/10.1038/hdy.1982.66
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