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Content with tag interbreeding .

A supergene limits migration in common quails

A scientific team led by the Doñana Biological Station (CSIC) and the University of Barcelona have found that many quails with darker coloration have a large chromosomal inversion. Birds with the inversion are darker, heavier, and have rounder wings, which suggest a poorer flight efficiency.
Darker quails are abundant in the southwest of the Iberian Peninsula. The researchers have found that quails with this chromosomal inversion are associated with a lack of or reduced migration.