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Evo-devo perspectives on segmentation: model organisms, and beyond.

Alessandro Minelli1, Giuseppe Fusco

  • 1Department of Biology, University of Padova, Via U. Bassi 58 B, I-35131 Padova, Italy. alessandro.minelli@unipd.it

Trends in Ecology & Evolution
|May 17, 2006
PubMed
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Animal segmentation patterns are diverse, challenging traditional views. Studying the evolution of segmentation requires integrating genetic, cellular, and developmental research across various stages and species.

Area of Science:

  • Developmental biology
  • Evolutionary biology
  • Genetics

Background:

  • Bilaterian animals exhibit diverse segmental patterns and segmentation processes.
  • Variations in segmentation occur both between different animal groups (taxa) and within individual animals across their serial structures.
  • The traditional concept of segments as modular building blocks struggles to encompass the diversity in developmental mechanisms and genetic control of segmentation.

Purpose of the Study:

  • To explore the diversity of segmentation patterns and processes in bilaterian animals.
  • To investigate the evolutionary implications of diverse developmental mechanisms and genetic control in segmentation.
  • To propose an integrated research approach for studying segmentation evolution.

Main Methods:

Related Experiment Videos

  • Comparative analysis of segmental patterns across taxa.
  • Examination of developmental mechanisms and genetic control of segmentation.
  • Integration of research on genes, cells, embryos, and post-embryonic stages.

    • Main Results:

    • Segmentation in bilaterians is highly diverse in both pattern and process.
    • Evolutionary pathways of segmentation are complex and do not always fit the modular building block concept.
    • Genetic and developmental factors contribute significantly to the observed diversity.

    Conclusions:

    • The evolution of segmentation is complex and requires a broad comparative framework.
    • Understanding segmentation evolution necessitates integrating knowledge from molecular genetics to developmental stages.
    • Future research should combine efforts across disciplines to fully elucidate segmentation diversity and evolution.