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Comentario sobre "Las transiciones a la asexualidad resultan en un exceso de sustituciones de aminoácidos"

¹Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield S10 2TN, UK. r.k.butlin@sheffield.ac.uk

Science (New York, N.Y.)

|September 9, 2006

Resumen

La Daphnia pulex asexual muestra mayores tasas de reemplazo de genes mitocondriales que los linajes sexuales. Sin embargo, el análisis no revela ningún cambio en el sesgo de composición de la base después de las transiciones de modo reproductivo en D. pulex.

Área de la Ciencia:

Biología evolutiva Biología evolutiva.
La genómica es la genómica.
Evolución molecular de la evolución molecular.

Sus antecedentes:

Investigaciones anteriores indicaron una mayor proporción de reemplazo de aminoácidos a la sustitución silenciosa en los genes mitocondriales de los linajes asexuales de Daphnia pulex en comparación con los linajes sexuales.
Se planteó la hipótesis de que este sesgo de composición básica se mantenía por selección, lo que sugiere que debería cambiar con las transiciones en el modo reproductivo.

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