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Inversión cromosómica asociada con diferencias en la dieta de las codornices comunes que comparten invernaderos

Celia Vinagre-Izquierdo1, Ines Sanchez-Donoso1, Jennifer A Leonard1

  • 1Conservation and Evolutionary Genetics Group Estación Biológica de Doñana (EBD-CSIC) Seville Spain.

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Resumen

Una inversión cromosómica específica en las codornices comunes está relacionada con rasgos distintos y migración limitada. Esto lleva a dos poblaciones genéticamente distintas que coexisten en las zonas de invierno, lo que afecta su comportamiento y el uso de recursos.

Palabras clave:
Inversión cromosómicael régimen alimenticiogenotipización por secuenciaciónLa migraciónisótopos estables

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Área de la Ciencia:

  • La genética evolutiva
  • Ecología del comportamiento
  • Biología de la conservación

Sus antecedentes:

  • Las inversiones cromosómicas son impulsores significativos de la diferenciación genética y la adaptación.
  • Una gran inversión en las codornices comunes (Coturnix coturnix) influye en rasgos como el tamaño del cuerpo y la eficiencia del vuelo, lo que podría afectar la migración.

Objetivo del estudio:

  • Investigar si una alta frecuencia de una inversión cromosómica específica explica la presencia de codornices comunes residentes en el sur de la Península Ibérica.
  • Para analizar la composición genómica, la morfología y el comportamiento migratorio de las codornices invernantes en el sur de España.

Principales métodos:

  • Estudio de una población de codornices comunes durante el invierno.
  • Analizó la composición genómica, la morfología y las relaciones de isótopos estables (deuterio, nitrógeno, carbono) en plumas primarias.
  • Comportamiento migratorio inferido y dieta de firmas de isótopos estables.

Principales resultados:

  • Coexistencia identificada de codornices con y sin la inversión cromosómica, exhibiendo diferentes morfologías y comportamientos migratorios.
  • Las codornices con la inversión mostraron una migración limitada, mientras que las sin ella parecían provenir de otras latitudes.
  • Las codornices migratorias mostraron diferencias en la dieta en comparación con las codornices residentes.

Conclusiones:

  • Existen dos linajes cromosómicos distintos y coexistentes de codornices comunes en el área de invernada, que difieren en morfología, comportamiento y uso de recursos.
  • Se espera que la falta de recombinación dentro de la inversión promueva una mayor divergencia entre estos linajes.
  • Este polimorfismo cromosómico juega un papel crucial en la dinámica ecológica y evolutiva de las codornices comunes.