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Comprehensive phylogeny of ray-finned fishes (Actinopterygii) based on transcriptomic and genomic data [PNAS]

Keywords : phylogenomics, divergence times, bony fish, paralogy, tree of life

par Frédéric Magné - publié le

Ray-finned fishes form the largest and most diverse group of vertebrates. Establishing their phylogenetic relationships is a critical step to explaining their diversity. We compiled the largest comparative genomic database of fishes that provides genome-scale support for previous phylogenetic results and used it to resolve further some contentious relationships in fish phylogeny. A vetted set of exon markers identified in this study is a promising resource for current sequencing approaches to significantly increase genetic and taxonomic coverage to resolve the tree of life for all fishes. Our time-calibrated analysis suggests that most lineages of living fishes were already established in the Mesozoic Period, more than 65 million years ago.

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