Data from: Evidence for past and present hybridization in three Antarctic icefish species provides new perspectives on an evolutionary radiation ...

• Main Authors: Marino, Ilaria A. M., Benazzo, Andrea, Agostini, Cecilia, Mezzavilla, Massimo, Hoban, Sean M., Patarnello, Tomaso, Zane, Lorenzo, Bertorelle, Giorgio
• Format: Dataset
• Language: English
• Published: Dryad 2013
• Subjects: Notothenioidei; Chionodraco hamatus; Channichthyidae; Chionodraco rastrospinosus; Chionodraco myersi; Holocene; Antarc*; Antarctic; Icefish
• Online Access: https://dx.doi.org/10.5061/dryad.n8n6k; https://datadryad.org/stash/dataset/doi:10.5061/dryad.n8n6k

Determining the timing, extent, and underlying causes of inter-specific gene exchange during or following speciation is central to understanding species’ evolution. Antarctic notothenioid fish, thanks to the acquisition of antifreeze glycoproteins during Oligocene transition to polar conditions, experienced a spectacular radiation to >100 species during Late Miocene cooling events. The impact of recent glacial cycles on this group is poorly known, but alternating warming and cooling periods may have affected species’ distributions, promoted ecological divergence into recurrently opening niches, and/or possibly brought allopatric species into contact. Using microsatellite markers and statistical methods including Approximate Bayesian Computation, we investigated genetic differentiation, hybridization and the possible influence of the last glaciation/deglaciation events in three icefish species of the genus Chionodraco. Our results provide strong evidence of contemporary and past introgression by showing ... : Marino et al. genotypesMicrosatellite genotypes used in the paper. Full description reported in the ReadMe file. ...