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Natural and artificial selection on a deviant character of the anal papillae in Drosophila melanogaster and their significance for salt adaptation
Author(s) -
Te Velde J. H.,
Scharloo W.
Publication year - 1988
Publication title -
journal of evolutionary biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.289
H-Index - 128
eISSN - 1420-9101
pISSN - 1010-061X
DOI - 10.1046/j.1420-9101.1988.1020155.x
Subject(s) - biology , selection (genetic algorithm) , adaptation (eye) , natural selection , drosophila melanogaster , character (mathematics) , evolutionary biology , melanogaster , directional selection , genetics , zoology , artificial intelligence , gene , computer science , mathematics , geometry , neuroscience
Artificial selection was carried out on a deviant character of remnants of the anal papillae in pupae of Drosophila melanogaster , i. e. stretched (S) instead of the normal retracted (R) papillae. A chromosomal interchange between the R‐ and S‐selection lines revealed the polygenic determination of the S‐character. A comparison of lines with a different number of chromosomes of the S‐line shows the importance of properties of the anal papillae for salt adaptation. By a comparison of populations obtained by artificial selection for anal papillae and by natural selection for salt adaptation we could analyse the significance of the deviant character under natural selection on media with increasing percentages of salt. Our results shows that taking into account only one character in natural selection is often a simplification. However, applying artificial selection on components of the phenotype contributing to the adaptation make an important contribution to the analysis of adaptive processes.