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  • Title: Induction of tetraploid gynogenesis in the European sea bass (Dicentrarchus labrax L.).
    Author: Peruzzi S, Chatain B.
    Journal: Genetica; 2003 Oct; 119(2):225-8. PubMed ID: 14620962.
    Abstract:
    A preliminary study on tetraploid gynogenetic induction in the European sea bass was performed by pressure-blocking the second polar body release and the first cleavage in eggs fertilized with ultraviolet-irradiated sperm. Fertilization of eggs with genetically inactivated sperm produced only haploid development that terminated around hatching. Pressure treatments (8.500 psi for 2 min) applied at 6 and 65 min after fertilization (a.f.) produced variable levels (7-95%) of tetraploid larvae at hatching. A small proportion of mosaics (3.8n/4.2n) was also recorded.
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