Impacts of both reference population size and inclusion of a residual polygenic effect on the accuracy of genomic prediction

Table 4 Correlations of DGV of milk yield of genotyped German Holstein animals compared to the February 2010 genomic evaluation with 5025 reference bulls

Phenotypic data from conventional evaluation	Nb of reference bulls	Common reference bulls in this run and the February 2010 run	Reference bulls in the February 2010 run but not in this run	Common candidates in this run and the February 2010 run	Candidates with a sire in both reference populations?
					yes	no
April 2009	1939	0.989	0.720	0.824	0.877	0.817
	3081	0.983	0.820	0.902	0.932	0.896
August 2009	3684	0.993	0.832	0.938	0.956	0.932
	4339	0.991	0.883	0.960	0.972	0.956
January 2010	4896	0.9996	0.875	0.993	0.997	0.991

ISSN: 1297-9686