Genetic parameters of fillet fatty acids and fat deposition in gilthead seabream (Sparus aurata) using the novel 30 k Medfish SNP array

Lipid-related traits are important candidates for a breeding goal gilthead seabream, because they affect both fish and human health, as well production efficiency. However, to date there have been very few estimates of genetic parameters these traits, the relationship between fatty acids other never reported seabream. Therefore, aim this study was estimate genomic heritability relationships fat deposition individual muscle in commercial population seabream using novel ~30 k MedFish SNP array. In total 967 fed with feed were genotyped chip which included K informative markers species. On average, weighed 372 g. The mean content eicosapentaenoic acid (EPA) + docosahexaenoic (DHA) 822 mg per 100 g fillet. fat, viscera weight percentage range 0.34–0.46. correlation body 0.12, indicating that variation is largely independent fish. product endogenous synthesis (n = 240), palmitoleic (16:1n-7), high (0.43). estimated EPA (%) DHA 0.39 0.33, respectively. Both had low, non-significant correlations weight, negative (−0.53). It possible increase fillets by selective breeding. 16:1n-7, marker de novo lipogenesis, suggests strong component metabolic pathway Muscle seem be faster growth not likely influence proportional DHA.