The effect of using approximate gametic variance covariance matrices on marker assisted selection by BLUP Liviu R. Totir, Rohan L. Fernando, Jack C.M. Dekkers, Soledad A. Fernández and Bernt Guldbrandtsen Genet. Sel. Evol., 36 1 (2004) 29-48 DOI: 10.1051/gse:2003049