Genetic Variation and Hybridization in Evolutionary Radiations of Cichlid Fishes

Evolutionary radiations are responsible for much of the variation in biodiversity across taxa. Cichlid fishes well known spectacular evolutionary radiations, as they have repeatedly evolved into large and phenotypically diverse arrays species. genomes carry signatures past events and, at same time, substrate ongoing evolution. We survey genome-wide data available literature covering 438 cichlid populations (412 species) multiple to synthesize information about patterns sharing genetic variation. Nucleotide diversity within species is low cichlids, with 92% surveyed having less than median value found other vertebrates. Divergence also low, a proportion shared among due incomplete lineage sorting widespread hybridization. Population genetics therefore provides suitable conceptual framework genomic studies radiations. focus detail on roles hybridization shaping promoting diversification.