Regulatory evolution of shavenbaby/ovo underlies multiple cases of morphological parallelism

Elio Sucena, Isabelle Delon, Isaac Jones, François Payre and David L. Stern ()
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Elio Sucena: Princeton University
Isabelle Delon: Centre de Biologie du Développement, Bâtiment 4R3
Isaac Jones: Vanguard High School
François Payre: Centre de Biologie du Développement, Bâtiment 4R3
David L. Stern: Princeton University

Nature, 2003, vol. 424, issue 6951, 935-938

Abstract: Abstract Cases of convergent evolution that involve changes in the same developmental pathway, called parallelism, provide evidence that a limited number of developmental changes are available to evolve a particular phenotype1. To our knowledge, in no case are the genetic changes underlying morphological convergence understood. However, morphological convergence is not generally assumed to imply developmental parallelism2. Here we investigate a case of convergence of larval morphology in insects and show that the loss of particular trichomes, observed in one species of the Drosophila melanogaster species group, has independently evolved multiple times in the distantly related D. virilis species group3. We present genetic and gene expression data showing that regulatory changes of the shavenbaby/ovo (svb/ovo) gene underlie all independent cases of this morphological convergence. Our results indicate that some developmental regulators might preferentially accumulate evolutionary changes and that morphological parallelism might therefore be more common than previously appreciated.

Date: 2003
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DOI: 10.1038/nature01768

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