T F Hansen

Summary

Affiliation: University of Oslo
Country: Norway

Publications

  1. ncbi request reprint Assessing current adaptation and phylogenetic inertia as explanations of trait evolution: the need for controlled comparisons
    Thomas F Hansen
    Department of Biological Sciences, Florida State University, Tallahassee, Florida 32306, USA
    Evolution 59:2063-72. 2005
  2. ncbi request reprint Epistasis in polygenic traits and the evolution of genetic architecture under stabilizing selection
    Joachim Hermisson
    Department of Ecology and Evolutionary Biology, Yale University, P O Box 208106, New Haven, Connecticut 06520 8106, USA
    Am Nat 161:708-34. 2003
  3. ncbi request reprint Perspective: Evolution and detection of genetic robustness
    J Arjan G M de Visser
    Department of Genetics, Wageningen University, Arboretumlaan 4, 6703 BD Wageningen, The Netherlands
    Evolution 57:1959-72. 2003
  4. ncbi request reprint The role of epistatic gene interactions in the response to selection and the evolution of evolvability
    Ashley J R Carter
    Florida State University, Department of Biological Sciences, Conradi Building, Tallahassee, FL 32306, USA
    Theor Popul Biol 68:179-96. 2005
  5. ncbi request reprint On adaptive accuracy and precision in natural populations
    Thomas F Hansen
    Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA
    Am Nat 168:168-81. 2006
  6. doi request reprint Why epistasis is important for selection and adaptation
    Thomas F Hansen
    Department of Biology, University of Oslo, CEES, P O Box 1066, Blindern, N 0316 Oslo, Norway
    Evolution 67:3501-11. 2013
  7. doi request reprint Interpreting the evolutionary regression: the interplay between observational and biological errors in phylogenetic comparative studies
    Thomas F Hansen
    Department of Biology, Centre for Ecological and Evolutionary Synthesis, University of Oslo, PB 1066, Blindern, N 0316 Oslo, Norway
    Syst Biol 61:413-25. 2012
  8. ncbi request reprint Age- and sex-distribution of the mutation load
    T F Hansen
    Department of Botany, NTNU, Trondheim, Norway
    Genetica 106:251-62. 1999
  9. doi request reprint Deviation from the line of least resistance does not exclude genetic constraints: a comment on Berner et al. (2010)
    Thomas F Hansen
    Department of Biology, Centre for Ecological and Evolutionary Synthesis, University of Oslo, Oslo, Norway
    Evolution 65:1821-2. 2011
  10. ncbi request reprint A comparative method for studying adaptation to a randomly evolving environment
    Thomas F Hansen
    Center for Evolutionary and Ecological Synthesis, Department of Biology, University of Oslo, PB 1066, Blindern, 0316 Oslo, Norway
    Evolution 62:1965-77. 2008

Detail Information

Publications21

  1. ncbi request reprint Assessing current adaptation and phylogenetic inertia as explanations of trait evolution: the need for controlled comparisons
    Thomas F Hansen
    Department of Biological Sciences, Florida State University, Tallahassee, Florida 32306, USA
    Evolution 59:2063-72. 2005
    ..The implementation of controlled comparisons is illustrated by an analysis of sex-ratio data for fig wasps. This analysis suggests that current adaptation and phylogenetic inertia influence this trait...
  2. ncbi request reprint Epistasis in polygenic traits and the evolution of genetic architecture under stabilizing selection
    Joachim Hermisson
    Department of Ecology and Evolutionary Biology, Yale University, P O Box 208106, New Haven, Connecticut 06520 8106, USA
    Am Nat 161:708-34. 2003
    ..Here, primarily genes with a high mutation rate are buffered, often at the cost of decanalization of other genes. An intuitive interpretation of this view is given in the discussion...
  3. ncbi request reprint Perspective: Evolution and detection of genetic robustness
    J Arjan G M de Visser
    Department of Genetics, Wageningen University, Arboretumlaan 4, 6703 BD Wageningen, The Netherlands
    Evolution 57:1959-72. 2003
    ....
  4. ncbi request reprint The role of epistatic gene interactions in the response to selection and the evolution of evolvability
    Ashley J R Carter
    Florida State University, Department of Biological Sciences, Conradi Building, Tallahassee, FL 32306, USA
    Theor Popul Biol 68:179-96. 2005
    ..The build-up of linkage disequilibrium also has negligible effects. We argue that directional epistasis is likely to have major effects on evolutionary dynamics and should be the focus of empirical studies of epistasis...
  5. ncbi request reprint On adaptive accuracy and precision in natural populations
    Thomas F Hansen
    Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA
    Am Nat 168:168-81. 2006
    ..We find that this component is often substantial and highly variable across traits. We suggest that selection for improved precision may be important for many traits...
  6. doi request reprint Why epistasis is important for selection and adaptation
    Thomas F Hansen
    Department of Biology, University of Oslo, CEES, P O Box 1066, Blindern, N 0316 Oslo, Norway
    Evolution 67:3501-11. 2013
    ..I show that these results are tied to a conceptual confusion, and are misleading as general statements about the significance of epistasis for the selection response and adaptation. ..
  7. doi request reprint Interpreting the evolutionary regression: the interplay between observational and biological errors in phylogenetic comparative studies
    Thomas F Hansen
    Department of Biology, Centre for Ecological and Evolutionary Synthesis, University of Oslo, PB 1066, Blindern, N 0316 Oslo, Norway
    Syst Biol 61:413-25. 2012
    ..We argue that such methods should never be used to estimate evolutionary or allometric regression slopes...
  8. ncbi request reprint Age- and sex-distribution of the mutation load
    T F Hansen
    Department of Botany, NTNU, Trondheim, Norway
    Genetica 106:251-62. 1999
    ..We show that a male-biased mutation rate is likely to result in both a male-biased mutation load and a load that increases with male age...
  9. doi request reprint Deviation from the line of least resistance does not exclude genetic constraints: a comment on Berner et al. (2010)
    Thomas F Hansen
    Department of Biology, Centre for Ecological and Evolutionary Synthesis, University of Oslo, Oslo, Norway
    Evolution 65:1821-2. 2011
    ..We reanalyze their data to show that evolution has happened in directions of much larger than average evolvability, and we conclude that their data are consistent with an influence of ancestral variational constraints...
  10. ncbi request reprint A comparative method for studying adaptation to a randomly evolving environment
    Thomas F Hansen
    Center for Evolutionary and Ecological Synthesis, Department of Biology, University of Oslo, PB 1066, Blindern, 0316 Oslo, Norway
    Evolution 62:1965-77. 2008
    ..The method considers a single trait adapting to an optimum that is influenced by one or more continuous, randomly changing predictor variables...
  11. ncbi request reprint Evolution of genetic architecture under directional selection
    Thomas F Hansen
    Centre for Ecological and Evolutionary Synthesis, Department of Biology, University of Oslo, 0316 Oslo, Norway
    Evolution 60:1523-36. 2006
    ....
  12. ncbi request reprint Adaptation and constraint in a stickleback radiation
    K L Voje
    Department of Biology, Centre for Ecological and Evolutionary Synthesis, University of Oslo, Blindern, Norway
    J Evol Biol 26:2396-414. 2013
    ..We also tested whether the number of lateral plates evolved in response to lake calcium levels, but found no evidence for this hypothesis. ..
  13. ncbi request reprint How does offspring quality change with age in male Drosophila melanogaster?
    D K Price
    Department of Biology, University of Oregon, Eugene 97403, USA
    Behav Genet 28:395-402. 1998
    ..These results are in somewhat better accordance with our alternative hypothesis, but the relatively weak and late occurring effects indicate that mate choice based on age may not be a viable strategy in this population...
  14. doi request reprint Artificial selection on allometry: change in elevation but not slope
    C K Egset
    Centre for Conservation Biology, Department of Biology, NTNU, Trondheim, Norway
    J Evol Biol 25:938-48. 2012
    ..To our knowledge, this study is the first artificial-selection experiment that directly tests the evolvability of static allometric slopes...
  15. doi request reprint Measuring and comparing evolvability and constraint in multivariate characters
    T F Hansen
    Department of Biology, Center for Ecological and Evolutionary Synthesis, University of Oslo, Oslo, Norway
    J Evol Biol 21:1201-19. 2008
    ..As an illustration, we show that divergence of wing shape in the dipteran family Drosophilidae has proceeded in directions that have relatively high evolvabilities...
  16. ncbi request reprint Is modularity necessary for evolvability? Remarks on the relationship between pleiotropy and evolvability
    Thomas F Hansen
    Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA
    Biosystems 69:83-94. 2003
    ..The most evolvable genetic architectures may often be those with an intermediate level of integration among characters, and in particular those where pleiotropic effects are variable and able to compensate for each other's constraints...
  17. pmc Seasonality, density dependence, and population cycles in Hokkaido voles
    Nils Chr Stenseth
    Centre for Ecological and Evolutionary Synthesis, Department of Biology, University of Oslo, P O Box 1031 Blindern, N 0316 Oslo, Norway
    Proc Natl Acad Sci U S A 100:11478-83. 2003
    ..Altogether, we demonstrate that seasonality plays a key role in determining whether a vole population is cyclic or not...
  18. ncbi request reprint A theoretical investigation of sympatric evolution of temporal reproductive isolation as illustrated by marine broadcast spawners
    Maurizio Tomaiuolo
    Department of Biological Science, Florida State University, Tallahassee, Florida 32306 1100, USA
    Evolution 61:2584-95. 2007
    ..Model analysis shows that the interaction between polyspermy and spawning synchrony can lead to temporal reproductive isolation in sympatry and that, more generally, increased density promotes maintenance of genetic variation...
  19. ncbi request reprint Evolvability and genetic constraint in Dalechampia blossoms: components of variance and measures of evolvability
    Thomas F Hansen
    Department of Biology, Norwegian University of Science and Technology, 7491 Trondheim, Norway
    J Evol Biol 16:754-66. 2003
    ..We provide evidence that the degree of among-population divergence of traits is related to their predicted evolvabilities, but not to their heritabilities...
  20. ncbi request reprint Comparing strengths of directional selection: how strong is strong?
    Joe Hereford
    Department of Biological Science, Florida State University, Tallahassee, Florida 32306 1100, USA
    Evolution 58:2133-43. 2004
    ....
  21. ncbi request reprint Evolvability and genetic constraint in Dalechampia blossoms: genetic correlations and conditional evolvability
    Thomas F Hansen
    Department of Biology, NTNU, 7491 Trondheim, Norway
    J Exp Zool B Mol Dev Evol 296:23-39. 2003
    ..This provides additional evidence that the D. scandens blossom is constrained in its short-term evolvability...