Integration of beef cattle international pedigree and genomic estimated breeding values into national evaluations, with an application to the Italian Limousin population

Table 6 Validation of the scenarios’ adequacy for direct and maternal EBV when EBV_INT of publishable sires are computed using single-step international evaluations^a

	Validation group	Scenario	ρ	LB (GSD)	b₁	R²_adj	RMSE (GSD)
Direct EBV	Domestic (≥ 15 off) (n = 1382)	NAT_APR	0.95	− 0.17	0.96	0.90	0.18
	Domestic (≥ 15 off) (n = 1382)	BLEND_APR	0.98	− 0.04	0.96	0.96	0.12
	Domestic (< 15 off) (n = 94)	NAT_APR	0.63	− 0.55	0.66	0.39	0.49
	Domestic (< 15 off) (n = 94)	BLEND_APR	0.97	− 0.20	0.97	0.93	0.16
	Foreign (n = 3470)	NAT_APR	0.24	− 0.26	0.71	0.06	0.62
	Foreign (n = 3470)	BLEND_APR	0.97	− 0.26	1.12	0.94	0.15
Maternal EBV	Domestic (≥ 15 off) (n = 491)	NAT_APR	0.99	0.06	1.01	0.98	0.07
	Domestic (≥ 15 off) (n = 491)	BLEND_APR	0.97	− 0.01	0.96	0.95	0.11
	Domestic (< 15 off) (n = 51)	NAT_APR	0.86	0.12	0.80	0.73	0.22
	Domestic (< 15 off) (n = 51)	BLEND_APR	0.85	0.00	0.72	0.71	0.23
	Foreign (n = 1165)	NAT_APR	0.52	0.06	1.00	0.27	0.27
	Foreign (n = 1165)	BLEND_APR	0.83	0.08	0.59	0.69	0.17

NAT_APR national evaluation without integration, BLEND_APR blended national evaluation with integration of publishable sires’ international information and correction for double-counting
ρ Pearson correlation of EBV, LB (GSD) level bias (in genetic standard deviations), b₁ slope, R²_adj adjusted R², RMSE (GSD) root mean square error (in genetic standard deviations)
^aThe EBV of different scenarios are compared with single-step EBV of scenario REF_{APR_trunc} (international evaluation including national data until April 2019 and foreign data prior to January 2019)
Domestic (≥ 15 off): publishable sires with at least 15 recorded offspring in Italy, Domestic (< 15 off): publishable sires with less than 15 recorded offspring in Italy, and Foreign: publishable sires with no recorded offspring in Italy

ISSN: 1297-9686