| Rapid and unpredictable changes of the G-matrix in a natural bird population over 25 years. | |
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MedLine Citation:
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PMID: 23240615 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Knowledge of the genetic variances and covariances of traits (the G-matrix) is fundamental for the understanding of evolutionary dynamics of populations. Despite its essential importance in evolutionary studies, empirical tests of the temporal stability of the G-matrix in natural populations are few. We used a 25-year-long individual-based field study on almost 7000 breeding attempts of the collared flycatcher (Ficedula albicollis) to estimate the stability of the G-matrix over time. Using animal models to estimate G for several time periods, we show that the structure of the time-specific G-matrices changed significantly over time. The temporal changes in the G-matrix were unpredictable, and the structure at one time period was not indicative of the structure at the next time period. Moreover, we show that the changes in the time-specific G-matrices were not related to changes in mean trait values or due to genetic drift. Selection, differences in acquisition/allocation patterns or environment-dependent allelic effects are therefore likely explanations for the patterns observed, probably in combination. Our result cautions against assuming constancy of the G-matrix and indicates that even short-term evolutionary predictions in natural populations can be very challenging. |
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Authors:
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M Björklund; A Husby; L Gustafsson |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of evolutionary biology Volume: 26 ISSN: 1420-9101 ISO Abbreviation: J. Evol. Biol. Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2012-12-17 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8809954 Medline TA: J Evol Biol Country: Switzerland |
Other Details:
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Languages: eng Pagination: 1-13 Citation Subset: IM |
Copyright Information:
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© 2012 The Authors. Journal of Evolutionary Biology © 2012 European Society For Evolutionary Biology. |
Affiliation:
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Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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