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Evidencia directa de una extensa herencia de ADN mitocondrial paterno en el mejillón marino Mytilus
E Zouros1, K R Freeman, A O Ball
1Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada.
Nature
|October 1, 1992
Resumen
La herencia del ADN mitocondrial (ADNmt) en los animales es típicamente materna. Sin embargo, este estudio revela una extensa contribución paterna de ADNmt en los mejillones, significativamente mayor que la observada previamente en otros animales como los ratones.
Área de la Ciencia:
- Biología evolutiva Biología evolutiva.
- Genética La genética.
- Biología Marina Biología Marina.
Sus antecedentes:
- La herencia del ADN mitocondrial (ADNmt) en los animales se ha considerado tradicionalmente estrictamente materna.
- Estudios recientes sugirieron fugas accidentales de ADNmt paterno en Drosophila y ratones, a frecuencias muy bajas (aprox. 10^-4) es el resultado de 10^-4.
- La alta frecuencia de individuos heteroplasmáticos en el mejillón marino Mytilus se ha debatido como evidencia de la herencia de ADNmt biparental.
Objetivo del estudio:
- Para investigar el alcance de la contribución de ADNmt paterno en los mejillones marinos (Mytilus edulis y Mytilus trossulus).
- Para comparar las frecuencias de herencia de ADNmt paterno en mejillones con las reportadas en otros modelos animales.
Principales métodos:
- Se llevaron a cabo apareamientos entre dos especies: Mytilus edulis y Mytilus trossulus.
- Los descendientes analizados para la presencia y frecuencia de las contribuciones de ADNmt materna y paterna.
Principales resultados:
- Se observó una amplia contribución del ADNmt paterno en cruces intra e interespecíficos de Mytilus.
- Las contribuciones paternas de ADNmt en mejillones fueron varios órdenes de magnitud más altas que las inferidas previamente para Drosophila y ratones.
Conclusiones:
- Los hallazgos proporcionan una fuerte evidencia de una herencia significativa de ADNmt biparental en Mytilus.
- Los mejillones exhiben una frecuencia única y mucho más alta de transmisión paterna de ADNmt en comparación con otros grupos de animales estudiados.
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