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When Phenotypes Do Not Match Genotypes—Unexpected Phenotypic Diversity and Potential Environmental Constraints in Icelandic Stickleback

Lucek, Kay ; Haesler, Marcel Philipp ; Sivasundar, Arjun

In: Journal of Heredity, 2012, vol. 103, no. 4, p. 579-584

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    Titre
    • When Phenotypes Do Not Match Genotypes—Unexpected Phenotypic Diversity and Potential Environmental Constraints in Icelandic Stickleback
    Auteur
    • Lucek, Kay. From the Institute for Ecology and Evolution, University of Bern, Baltzerstrasse 6, CH-3012 Bern, Switzerland (Lucek, Haesler, and Sivasundar); and Department of Fish Ecology, EAWAG Center for Ecology, Evolution and Biogeochemistry, Seestrasse 79, CH-6047 Kastanienbaum, Switzerland (Lucek, Haesler, and Sivasundar)
    • Haesler, Marcel Philipp. From the Institute for Ecology and Evolution, University of Bern, Baltzerstrasse 6, CH-3012 Bern, Switzerland (Lucek, Haesler, and Sivasundar); and Department of Fish Ecology, EAWAG Center for Ecology, Evolution and Biogeochemistry, Seestrasse 79, CH-6047 Kastanienbaum, Switzerland (Lucek, Haesler, and Sivasundar)
    • Sivasundar, Arjun. From the Institute for Ecology and Evolution, University of Bern, Baltzerstrasse 6, CH-3012 Bern, Switzerland (Lucek, Haesler, and Sivasundar); and Department of Fish Ecology, EAWAG Center for Ecology, Evolution and Biogeochemistry, Seestrasse 79, CH-6047 Kastanienbaum, Switzerland (Lucek, Haesler, and Sivasundar)
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Journal of Heredity, 2012, vol. 103, no. 4, p. 579-584. Oxford University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:298406
    Summary
    Divergent lateral plate phenotypes in stickleback represent one of only a few cases known, where a single gene underlies the phenotype under divergent selection between different habitats. However, the selection pressures leading to the repeated loss of lateral plates in freshwater are still not well understood. By genotyping 838 individuals from 9 independently colonized lakes and 1 marine population in Iceland, we found 1) that only in some lakes are phenotypes associated with the expected genotype and 2) that the independent repeated occurrence of a rarely described plate phenotype is expressed in the absence of an allele that is usually associated with this phenotype. This suggests that either other genes such as modifiers might be under divergent selection between lakes or that lateral plate expression in these populations is restricted due to environmental constraints