Comparison of joint versus purebred genomic evaluation in the French multi-breed dairy goat population

Table 4 Regression coefficients of DYD on GEBV from three models for the 252 validation males regardless of breed

Trait	Multi-breed		Multiple-trait						Within-breed
	Multi-breed		ρ = 0.99		ρ estimated		ρ = 0		Within-breed
	reg	SE	reg	SE	reg	SE	reg	SE	reg	SE
Milk yield	0.58	0.12	0.76	0.10	0.48	0.10	0.49	0.10	0.77	0.10
Fat yield	0.62	0.08	0.67	0.08	0.62	0.08	0.61	0.08	0.69	0.08
Protein yield	0.43	0.09	0.53	0.09	0.44	0.09	0.44	0.09	0.54	0.09
Fat content	0.86	0.07	0.97	0.08	0.76	0.08	0.76	0.08	0.79	0.08
Protein content	0.95	0.07	0.92	0.07	0.94	0.06	0.94	0.07	1.17	0.08
Somatic cell score	0.67	0.08	0.68	0.08	0.64	0.08	0.64	0.08	0.71	0.08
Udder floor position	0.76	0.08	0.86	0.07	0.80	0.08	0.80	0.08	0.90	0.08
Udder shape	0.66	0.09	0.96	0.09	0.65	0.09	0.65	0.09	0.96	0.09
Rear udder attachment	0.70	0.09	1.46	0.11	0.60	0.10	0.59	0.10	1.51	0.11
Fore udder	0.60	0.09	0.89	0.10	0.55	0.10	0.56	0.10	0.94	0.10
Teat angle	0.74	0.08	1.10	0.09	0.58	0.09	0.56	0.11	1.19	0.10

ρ is the genetic correlation between Alpine and Saanen goats used in the multiple-trait model.

ISSN: 1297-9686