Genetic and economic responses for within-family marker-assisted selection in dairy cattle breeding schemes

摘要

Marker-assisted selection schemes that utilize in- formation about quantitative trait loci to preselect progeny test bulls within a family are the most practi- cal application of quantitative trait loci results in the short-term. Technical difficulties exist for across- family marker-assisted selection using BLUP proce- dures. Two within-family marker-assisted selection schemes were evaluated genetically and economically using stochastic simulation for a locus that explained 5/100 of phenotypic variance. The genetic and economic impacts of variation in the number of offspring per bull-dam were evaluated.