Identification of a novel sex determining chromosome in cichlid fishes that acts as XY or ZW in different lineages

Anna Fiona Feller, Vera Ogi, Ole Seehausen & Joana Isabel Meier
Sex determination systems are highly conserved among most vertebrates with genetic sex determination, but can be variable and evolve rapidly in some. Here, we study sex determination in a clade with exceptionally high sex chromosome turnover rates. We identify the sex determining chromosomes in three interspecific crosses of haplochromine cichlid fishes from Lakes Victoria and Malawi. We find evidence for different sex determiners in each cross. In the Malawi cross and one Victoria cross the...
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