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Ancient hybridization fuels rapid cichlid fish adaptive radiations [Nature Communications]

Keywords : adaptive radiation, evolutionary genetics, molecular evolution, phylogenetics

par Frédéric Magné - publié le

nderstanding why some evolutionary lineages generate exceptionally high species diversity is an important goal in evolutionary biology. Haplochromine cichlid fishes of Africa’s Lake Victoria region encompass >700 diverse species that all evolved in the last 150,000 years. How this ‘Lake Victoria Region Superflock’ could evolve on such rapid timescales is an enduring question. Here, we demonstrate that hybridization between two divergent lineages facilitated this process by providing genetic variation that subsequently became recombined and sorted into many new species.(...)

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