Polymorphism of sex determination amongst wild populations suggests its rapid turnover within the nile tilapia species

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SUMMARY

    In reptiles, amphibians and fish, sex chromosomes and sex-determination genes often differ among even closely related species (Ezaz et_al, 2009; Myosho et_al, 2012; Jeffries et_al, 2018). Genomic sequencing has shed light on the diversity of sex systems and sex chromosomes in fish lineages, emphasizing their plasticity with rapid turnover of teleost sex chromosomes and in many cases the existence of multiple sex chromosomes (Sember et_al, 2021; Tao et_al, 2021). There are frequent transitions in the sex chromosome system, even within the same genus (Cnaani et_al, 2008; Takehana et_al, 2008; Roberts et_al, 2009; B . . .

     

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