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El cambio de huésped a una planta invasora desencadena una rápida especiación animal híbrida
Dietmar Schwarz1, Benjamin M Matta, Nicole L Shakir-Botteri
1Department of Entomology, The Pennsylvania State University, 501 ASI Building, University Park, Pennsylvania 16803, USA. dxs332@psu.edu
Nature
|July 29, 2005
Resumen
La especiación híbrida homoploide, una rara ruta de especiación animal sin cambio cromosómico, se demuestra en las moscas de la fruta. La hibridación vinculada a un nuevo recurso de huésped ofrece un mecanismo robusto para el aislamiento reproductivo.
Área de la Ciencia:
- Biología evolutiva Biología evolutiva.
- Genética La genética.
- Zoología Zoología Zoología.
Sus antecedentes:
- La especiación generalmente implica la división del linaje, no la hibridación.
- La especiación híbrida homoploide, que forma una nueva especie a través de la hibridación sin cambio cromosómico, se considera rara en los animales.
Objetivo del estudio:
- Para investigar el primer caso claro de especiación híbrida homoploide en animales.
- Para explorar el papel de los cambios de huésped en la especiación animal híbrida.
Principales métodos:
- Análisis de pruebas moleculares y cromosómicas.
- Investigando taxones animales específicos del huésped (las moscas de la fruta tefrítidas).
Principales resultados:
- Identificó la hibridación como el origen de un taxón animal derivado diploide bisexual.
- Demostró una clara asociación entre la hibridación y el cambio a un nuevo recurso huésped en las moscas de la fruta.
Conclusiones:
- La especiación híbrida vinculada a los cambios de huésped proporciona un mecanismo robusto para el aislamiento reproductivo.
- La especiación híbrida homoploide puede ser más frecuente en animales, especialmente parásitos, de lo que se pensaba anteriormente.
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