Inter-clutch egg differences and androgenesis in rainbow trout (Oncorhynchus mykiss, Walbaum 1792)

Abstract Ionizing radiation (IR) is applied to inactivate the nuclear genome in rainbow trout eggs during induced androgenetic development. However, IR-generated reactive oxygen species (ROS) may affect developmental potential of and reduce effectiveness androgenesis. To verify this assumption, development was irradiated with 350 Gy X-rays. Survival rates, pH ovarian fluid activity antioxidant enzymes, including SOD, CAT GPx, were examined non-irradiated originating from four females. rates embryos developing produced by different females varied 1% 57% these inter-clutch differences significant. Eggs female F4, which showed highest competence for androgenesis, also increased activities GPx enzymes. The value each over 8 before after irradiation, therefore it seems that did not pH. Considering above-mentioned differences, a strong maternal effect on androgenesis can be assumed. enzymes irradiation should expected show