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Analysis of the Development of a Morphological Phenotype as a Function of Protein Concentration in Budding Yeast
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Published on: March 24, 2010

Las limitaciones del desarrollo frente a la flexibilidad en la evolución morfológica.

Patricia Beldade1, Kees Koops, Paul M Brakefield

  • 1Institute of Evolutionary and Ecological Sciences, Leiden University, PO Box 9516, 2300 RA Leiden, The Netherlands. pbeldade@rulsfb.leidenuniv.nl

Nature
|April 27, 2002
PubMed
Resumen

La biología del desarrollo evolutivo explora cómo el desarrollo influye en el cambio evolutivo. Este estudio muestra que los patrones de las alas de las mariposas pueden cambiar de forma independiente, lo que sugiere que la selección natural, no las limitaciones del desarrollo, impulsa la diversidad.

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Área de la Ciencia:

  • Biología del desarrollo evolutivo Biología del desarrollo evolutivo
  • Evo-Devo es el nombre de Evo-Devo.
  • Morfología de los animales.

Sus antecedentes:

  • La biología evolutiva del desarrollo cambia el enfoque de la selección natural de la clasificación de la variación a la producción de variación del desarrollo.
  • Los mecanismos de desarrollo pueden sesgar las trayectorias evolutivas, causando potencialmente estancamiento o limitando la evolución morfológica.
  • La evidencia empírica de las restricciones evolutivas en la morfología es escasa, a pesar de la extensa discusión teórica.

Objetivo del estudio:

  • Investigar el papel de las limitaciones del desarrollo frente a la selección natural en la conformación de los patrones de alas de mariposas.
  • Para probar si los elementos repetidos en serie, como las manchas oculares, evolucionan de forma independiente o están acoplados en el desarrollo.
  • Proporcionar datos empíricos sobre la flexibilidad de la evolución morfológica en los patrones de alas de mariposas.

Principales métodos:

  • Estudió la especie de mariposa Bicyclus anynana, conocida por sus diversos patrones de alas.
  • Examinó las relaciones de desarrollo entre múltiples manchas oculares en las alas.
  • Evaluó el potencial de cambios evolutivos independientes en los elementos de patrón de ala repetidos en serie.

Principales resultados:

  • A pesar del acoplamiento del desarrollo entre las manchas oculares de Bicyclus anynana, se observó un potencial significativo de cambios independientes.
  • Esta flexibilidad del desarrollo permite una modificación evolutiva sustancial de los patrones de las alas.
  • Los hallazgos desafían la noción de fuertes restricciones internas de desarrollo que limitan la novedad evolutiva.

Conclusiones:

  • La evolución del patrón del ala de la mariposa exhibe una flexibilidad considerable, lo que apoya un papel importante para la selección natural.
  • Las vías de desarrollo no parecen ser una restricción primaria en la diversificación de estos rasgos complejos.
  • El estudio destaca la interacción entre el sesgo del desarrollo y la selección natural en la generación de biodiversidad.