Molecular Biology and Evolution 18:681-683 (2001)
© 2001 Society for Molecular Biology and Evolution
LETTER |
Evolutionary Rates of Duplicate Genes in Fish and Mammals
Centre National de la Recherche Scientifique UMR 5665, Laboratoire de Biologie Moléculaire et Cellulaire, Ecole Normale Supérieure de Lyon, Lyon, France
Recently, much attention has been attracted by the abundance of duplicate genes in teleost fish (Amores et al. 1998
; Wittbrodt, Meyer, and Schartl 1998
). It has been suggested that this abundance reflected an ancestral genome duplication and that it may be related to the great diversity of this group (Vogel 1998
). Emphasizing the importance of gene duplication in evolution, Ohno (1970)
pointed out that at least one of the two copies may become less constrained by selection and thus be able to evolve toward a new function. Hughes and Hughes (1993)
tested this hypothesis in the recent tetraploid Xenopus laevis and showed that both duplicate copies evolve at the same rate, with evidence of negative selection on both.
Our aim was
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