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The alignment between phenotypic plasticity, the major axis of genetic variation and the response to selection
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology. Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England..
Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England..
Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England..
Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England.;Univ Chile, Ctr Nacl Media Ambiente, Santiago, Chile..
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2015 (English)In: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 282, no 1816, 20151651Article in journal (Refereed) Published
Abstract [en]

Phenotypic plasticity is the ability of a genotype to produce more than one phenotype in order to match the environment. Recent theory proposes that the major axis of genetic variation in a phenotypically plastic population can align with the direction of selection. Therefore, theory predicts that plasticity directly aids adaptation by increasing genetic variation in the direction favoured by selection and reflected in plasticity. We evaluated this theory in the freshwater crustacean Daphnia pulex, facing predation risk from two contrasting size-selective predators. We estimated plasticity in several life-history traits, the G matrix of these traits, the selection gradients on reproduction and survival, and the predicted responses to selection. Using these data, we tested whether the genetic lines of least resistance and the predicted response to selection aligned with plasticity. We found predator environment-specific G matrices, but shared genetic architecture across environments resulted in more constraint in the G matrix than in the plasticity of the traits, sometimes preventing alignment of the two. However, as the importance of survival selection increased, the difference between environments in their predicted response to selection increased and resulted in closer alignment between the plasticity and the predicted selection response. Therefore, plasticity may indeed aid adaptation to new environments.

Place, publisher, year, edition, pages
2015. Vol. 282, no 1816, 20151651
Keyword [en]
Daphnia pulex, Chaoborus flavicans, Gasterosteus aculeatus, genetic accommodation, phenotypic plasticity, predation
National Category
Genetics
Identifiers
URN: urn:nbn:se:uu:diva-267223DOI: 10.1098/rspb.2015.1651ISI: 000363484700011OAI: oai:DiVA.org:uu-267223DiVA: diva2:872456
Funder
Swedish Research Council, VR 623-2010-848NERC - the Natural Environment Research Council, NE/D012244/1
Available from: 2015-11-19 Created: 2015-11-19 Last updated: 2017-12-01Bibliographically approved

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Lind, Martin I.

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