PREDICTION OF SELECTION RESPONSE FOR POISSON DISTRIBUTED TRAITS

This paper presents a formula to predict expected response to one gene ration of truncation selection for a Poisson distributed trait under p olygenic additive inheritance. The derivation relies of the Poisson-lo gnormal model and its analysis via quasi-likelihood. The formula deriv ed accounts for asymmetry of response. The relationship with the class ical formula R = irhosigma(G) is explained. Properties are illustrated with an example of sire selection based on progeny test performance.