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Morphological intergration between development compartments in the Drosophila wing.

C P Klingenberg1, S D Zaklan

  • 1Department of Zoology, Duke University, Durham, North Carolina 27708-0325, USA. cpk24@cam.ac.uk

Evolution; International Journal of Organic Evolution
|September 27, 2000
PubMed
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Developmental integration in Drosophila melanogaster wings shows significant covariation between anterior and posterior compartments. This suggests integrated developmental processes, not independent units, shape wing morphology.

Area of Science:

  • Evolutionary developmental biology
  • Quantitative genetics
  • Biomorphometrics

Background:

  • Developmental integration describes covariation in structures from linked developmental processes.
  • Understanding integration is key to explaining morphological evolution and variation.

Purpose of the Study:

  • To investigate developmental integration within the Drosophila melanogaster wing.
  • To test the hypothesis of independent variation between anterior and posterior wing compartments.

Main Methods:

  • Geometric morphometrics applied to Drosophila melanogaster wing shape.
  • Analysis of inter-individual variation and fluctuating asymmetry (FA).
  • Principal component analysis (PCA) and partial least-squares (PLS) methods used.

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Main Results:

  • PCA revealed integrated patterns involving both anterior and posterior compartments for inter-individual variation and FA.
  • PLS analysis demonstrated pervasive integration between the two compartments.
  • Covariation between compartments explained nearly all wing shape variation.

Conclusions:

  • Anterior and posterior wing compartments are not independent units of variation.
  • Wing shape variation arises from integrated developmental processes across compartments.
  • Localized processes for vein identity contribute less to overall shape variation.