T F Hansen

Summary

Affiliation: Florida State University
Country: USA

Publications

  1. 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
  2. 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
  3. 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
  4. 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
  5. pmc Epistasis and the mutation load: a measurement-theoretical approach
    T F Hansen
    Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520 8106, USA
    Genetics 158:477-85. 2001
  6. ncbi request reprint Modeling genetic architecture: a multilinear theory of gene interaction
    T F Hansen
    Department of Ecology and Evolutionary Biology, Yale University, New Haven, Connecticut 06520 8106, USA
    Theor Popul Biol 59:61-86. 2001
  7. 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
  8. ncbi request reprint Is Hsp90 a regulator of evolvability?
    G P Wagner
    Department of Ecology and Evolutionary Biology, Yale University, New Haven, Connecticut 06520 8106, USA
    J Exp Zool 285:116-8. 1999
  9. 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
  10. ncbi request reprint Consequences of inter-population crosses on developmental stability and canalization of floral traits in Dalechampia scandens (Euphorbiaceae)
    C PElabon
    Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
    J Evol Biol 17:19-32. 2004

Detail Information

Publications24

  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. pmc Epistasis and the mutation load: a measurement-theoretical approach
    T F Hansen
    Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520 8106, USA
    Genetics 158:477-85. 2001
    ..We derive a simple criterion for the strength of epistasis that is necessary to overcome the twofold disadvantage of sex...
  6. ncbi request reprint Modeling genetic architecture: a multilinear theory of gene interaction
    T F Hansen
    Department of Ecology and Evolutionary Biology, Yale University, New Haven, Connecticut 06520 8106, USA
    Theor Popul Biol 59:61-86. 2001
    ..It is shown how the model can be used to estimate the strength of "functional" epistasis from a variety of genetic experiments...
  7. 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...
  8. ncbi request reprint Is Hsp90 a regulator of evolvability?
    G P Wagner
    Department of Ecology and Evolutionary Biology, Yale University, New Haven, Connecticut 06520 8106, USA
    J Exp Zool 285:116-8. 1999
    ..We conclude that Hsp90 holds promise as a molecular model system for the evolution of evolvability. J. Exp. Zool. ( Mol. Dev. Evol. ) 285:116-118, 1999...
  9. 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...
  10. ncbi request reprint Consequences of inter-population crosses on developmental stability and canalization of floral traits in Dalechampia scandens (Euphorbiaceae)
    C PElabon
    Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
    J Evol Biol 17:19-32. 2004
    ..This study also confirms the weak relationship between FA and the breakdown of coadapted gene complexes following inter-population hybridization...
  11. 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...
  12. ncbi request reprint Response of fluctuating and directional asymmetry to selection on wing shape in Drosophila melanogaster
    C PElabon
    Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
    J Evol Biol 19:764-76. 2006
    ..This result may be interpreted as a release of genetic variance in directional asymmetry under selection...
  13. 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...
  14. doi 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...
  15. 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...
  16. 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
    ....
  17. 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
    ....
  18. ncbi request reprint Patterns of asymmetry in the twining vine Dalechampia scandens (Euphorbiaceae): ontogenetic and hierarchical perspectives
    Christophe PElabon
    Department of Biology, Norwegian University of Science and Technology NTNU, 7491 Trondheim, Norway
    New Phytol 170:65-74. 2006
    ..These asymmetries persist during leaf expansion, but tend to be reduced by unknown mechanisms...
  19. 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...
  20. 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...
  21. 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
    ....
  22. 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...
  23. 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...
  24. ncbi request reprint Variational and genetic properties of developmental stability in Dalechampia scandens
    Christophe PElabon
    Department of Biology, Norwegian University of Science and Technology, 7491 Trondheim, Norway
    Evolution 58:504-14. 2004
    ....