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When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
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Un gen para un fenotipo extendido.

Kelli Hoover1, Michael Grove, Matthew Gardner

  • 1Department of Entomology and Center for Chemical Ecology, Pennsylvania State University, University Park, PA 16802, USA. kxh25@psu.edu

Science (New York, N.Y.)
|September 10, 2011
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Resumen

Los parásitos pueden alterar el comportamiento del huésped, como las polillas gitanas que se suben a los árboles para morir y propagar un baculovirus. Los investigadores identificaron el gen viral específico responsable de este comportamiento de escalada manipulado.

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Área de la Ciencia:

  • Ecología del comportamiento ecología del comportamiento.
  • Virología Virología.
  • Genética La genética.

Sus antecedentes:

  • La manipulación del comportamiento del huésped por los parásitos es común pero poco comprendida.
  • Las polillas gitanas infectadas con un baculovirus exhiben un comportamiento alterado, trepando árboles antes de morir.
  • Este comportamiento facilita la transmisión viral a nuevos huéspedes a través de la "lluvia viral".

Objetivo del estudio:

  • Para identificar la base genética de la manipulación del comportamiento del huésped inducida por baculovirus.
  • Para entender el mecanismo por el cual el virus controla el comportamiento de la mariposa gitana en la escalada.

Principales métodos:

  • Análisis genético de polillas gitanas infectadas por baculovirus.
  • Identificación de genes virales específicos asociados con cambios de comportamiento.

Principales resultados:

  • Se identificó un gen viral específico como responsable de manipular el comportamiento de escalada de la polilla gitana.
  • Este hallazgo proporciona evidencia directa de una base genética del fenotipo extendido.

Conclusiones:

  • El estudio aclara los fundamentos genéticos de la manipulación del comportamiento inducida por parásitos.
  • Esta investigación ofrece una explicación molecular para el fenotipo extendido en las interacciones huésped-parásito.