Benefits of genomic evaluation in aquaculture breeding programs with separate rearing of families

A common type of rearing in aquaculture selective breeding programs is to keep families separate tanks until fish large enough be individually tagged. This introduces an environmental effect the members same family which can difficult disentangled from genetic effects when traditional BLUP evaluation used. The use genomic could lead a better prediction these as markers capture more accurately relationships between raised different and full-sibs tank. objective this simulation study was predict benefit (GBLUP) compared presence effects. Models that included or excluded they were present compared. Populations with two levels linkage disequilibrium generated. heritability selected trait 0.4 three proportions phenotypic variance due (0.0, 0.1 0.3) considered. Nested mating designs where each male mated females simulated create 200 full-sib 10 50 per family. GBLUP less affected than by loss gain ranged 0% 4% 2% 7% BLUP. As consequence, increased effects, extra increasing size. In absence up 20% higher their presence, 27% Although always led lower inbreeding BLUP, there no benefits terms reductions Finally, but ignored model, moderate dramatically, particularly scenarios.