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The production of gynogenetic Atlantic salmon, Salmo salar L.

Abstract

The production of Atlantic salmon gynogenomes by the combined use of a novel method for sperm irradiation and differently timed high hydrostatic pressure shocks is described. Sperm solutions were exposed to UV irradiation in a temperature-controlled flow-through device. Eggs fertilised with such sperm were exposed to shocks of 9500 psi at 30 min or approximately 7 h after fertilisation in order to produce meiotic and mitotic gynogenomes respectively. Yields of meiotic gynogenomes were generally high (up to 95%); those of mitotic gynogenomes were lower (range 2–20%). Analyses of the offspring by ploidy status and fingerprinting confirmed their gynogenetic origin. Small numbers of mitotic gynogenetic fish were grown on for 2 years in fresh and salt water. S1/S2 ratios were lower in gynogenetic fish and mean age at maturity was greater. Of the presumptive gynogenetic fish subjected to destructive sampling (n = 87) all were female.

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Communicated by G. Wenzel

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Johnstone, R., Stet, R.J.M. The production of gynogenetic Atlantic salmon, Salmo salar L.. Theoret. Appl. Genetics 90, 819–826 (1995). https://doi.org/10.1007/BF00222017

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Key words

  • Salmo salar
  • Gynogenesis Fingerprinting
  • Ploidy manipulation