Induction of Tetraploid Gynogenesis in the European Sea Bass (Dicentrarchus labrax L.) |
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Authors: | S Peruzzi B Chatain |
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Institution: | (1) Laboratoire de Recherche Piscicole de Méditerranée, Chemin de Maguelone, IFREMER, F-34250 Palavas-les-Flots, France |
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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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Keywords: | Dicentrarchus labrax gynogenesis pressure shock sea bass tetraploidy |
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