Expected Response to Selection in Synthetic Populations of Perennial Ryegrass

Confidence intervals for heritability and expected genetic advance of seven agronomic traits in two populations of perennial ryegrass have been computed in two ways (a = bootstrap method; b = parametric method) for five different combinations of selection. Two conclusions can be drawn from our results: Superiority of individual selection over family or every combination of selection. Usefulness of methods based on resampling to estimate confidence intervals for genetic parameters without particular statistical hypotheses.