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Conflicting processes in the evolution of body size and development time.

Publication ,  Journal Article
Nijhout, HF; Roff, DA; Davidowitz, G
Published in: Philosophical transactions of the Royal Society of London. Series B, Biological sciences
February 2010

Body size and development time of Manduca sexta are both determined by the same set of three developmental-physiological factors. These define a parameter space within which it is possible to analyse and explain how phenotypic change is associated with changes in the underlying factors. Body size and development time are determined by the identical set of underlying factors, so they are not independent, but because the mechanisms by which these factors produce each phenotype are different, the two phenotypes are only weakly correlated, and the correlation is context dependent. We use a mathematical model of this mechanism to explore the association between body size and development time and show that the correlation between these two life-history traits can be positive, zero or negative, depending entirely on where in parameter space a population is located, and on which of the underlying factors has a greater variation. The gradient within this parameter space predicts the unconstrained evolutionary trajectory under directional selection on each trait. Calculations of the gradients for body size and development time revealed that these are nearly orthogonal through much of the parameter space. Therefore, simultaneous directional selection on body size and development time can be neither synergistic nor antagonistic but leads to conflicting selection on the underlying developmental parameters.

Duke Scholars

Published In

Philosophical transactions of the Royal Society of London. Series B, Biological sciences

DOI

EISSN

1471-2970

ISSN

0962-8436

Publication Date

February 2010

Volume

365

Issue

1540

Start / End Page

567 / 575

Related Subject Headings

  • Time Factors
  • Phenotype
  • Models, Genetic
  • Models, Biological
  • Manduca
  • Growth and Development
  • Evolutionary Biology
  • Body Size
  • Biological Evolution
  • Animals
 

Citation

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Nijhout, H. F., Roff, D. A., & Davidowitz, G. (2010). Conflicting processes in the evolution of body size and development time. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 365(1540), 567–575. https://doi.org/10.1098/rstb.2009.0249
Nijhout, H Frederik, Derek A. Roff, and Goggy Davidowitz. “Conflicting processes in the evolution of body size and development time.Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences 365, no. 1540 (February 2010): 567–75. https://doi.org/10.1098/rstb.2009.0249.
Nijhout HF, Roff DA, Davidowitz G. Conflicting processes in the evolution of body size and development time. Philosophical transactions of the Royal Society of London Series B, Biological sciences. 2010 Feb;365(1540):567–75.
Nijhout, H. Frederik, et al. “Conflicting processes in the evolution of body size and development time.Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, vol. 365, no. 1540, Feb. 2010, pp. 567–75. Epmc, doi:10.1098/rstb.2009.0249.
Nijhout HF, Roff DA, Davidowitz G. Conflicting processes in the evolution of body size and development time. Philosophical transactions of the Royal Society of London Series B, Biological sciences. 2010 Feb;365(1540):567–575.
Journal cover image

Published In

Philosophical transactions of the Royal Society of London. Series B, Biological sciences

DOI

EISSN

1471-2970

ISSN

0962-8436

Publication Date

February 2010

Volume

365

Issue

1540

Start / End Page

567 / 575

Related Subject Headings

  • Time Factors
  • Phenotype
  • Models, Genetic
  • Models, Biological
  • Manduca
  • Growth and Development
  • Evolutionary Biology
  • Body Size
  • Biological Evolution
  • Animals