Document Detail

Rapid and unpredictable changes of the G-matrix in a natural bird population over 25 years.
MedLine Citation:
PMID:  23240615     Owner:  NLM     Status:  In-Data-Review    
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.
M Björklund; A Husby; L Gustafsson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of evolutionary biology     Volume:  26     ISSN:  1420-9101     ISO Abbreviation:  J. Evol. Biol.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2012-12-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8809954     Medline TA:  J Evol Biol     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  1-13     Citation Subset:  IM    
Copyright Information:
© 2012 The Authors. Journal of Evolutionary Biology © 2012 European Society For Evolutionary Biology.
Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden.
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