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

Table 1 Genomic and phenotypic data^§ used for routine genomic evaluation and for the validation study in January 2010 for German Holstein bulls

Year of birth	Data for routine genomic evaluation		Data for genomic validation study
	Nb of genotyped animals	Nb of bulls in reference population	Nb of bulls with daughters	Sum
			Reference population
≤ 1997	621	614	614
1998	411	404	404
1999	473	458	458
2000	558	518	518	3676
2001	562	509	504
2002	618	509	507
2003	1131	999	671
			Validation set
			328	1232
2004	1207	906	904
2005	630	112
2006-2009	4267
Sum	10,487	5,025		4908

ISSN: 1297-9686