Prediction of genomic breeding values for growth, carcass and meat quality traits in a multi-breed sheep population using a HD SNP chip

Table 7 The ratio, K, of expected (assuming accuracies of molecular breeding values for each scenario) spread to observed spread of molecular breeding values for traits measured in the live animal

Trait¹	GB0	GB2PC	GB4PC	GB6PC	GB10	GB20	GBRCV	GBKCV	GBC	k5EDM	k5G	k10EDM	K10G1	K10G2
BWT	0.66	0.66	0.61	0.56	0.72	0.80	0.36 ± 0.26	0.17 ± 0.20	0.65 ± 0.09	0.58	0.68	0.57	–	0.59
WWT	0.51	0.47	0.44	0.41	0.54	0.57	0.54 ± 0.02	0.33 ± 0.08	0.33 ± 0.29	0.53	0.55	0.52	0.27	0.28
LW6	0.64	0.60	0.59	0.56	0.67	0.71	0.55 ± 0.04	0.33 ± 0.08	0.43 ± 0.29	0.65	0.62	0.63	0.40	0.42
EMD	0.94	0.94	0.97	0.96	0.98	1.03	0.85 ± 0.07	0.51 ± 0.11	0.69 ± 0.20	0.97	0.94	0.91	0.83	1.53
EMDad	1.01	1.02	1.05	1.06	1.05	1.08	0.81 ± 0.07	0.75 ± 0.15	0.84 ± 0.33	1.02	1.02	1.16	1.09	2.54
EMW	0.86	0.88	0.91	0.85	0.90	0.93	0.77 ± 0.07	0.50 ± 0.07	0.82 ± 0.40	0.90	0.87	1.01	0.95	2.12
EMWad	1.04	1.04	1.06	1.05	1.08	1.13	0.83 ± 0.06	0.70 ± 0.10	1.23 ± 0.17	1.06	1.06	1.18	1.26	1.53
FDM	0.80	0.66	0.63	0.62	0.83	0.86	0.69 ± 0.05	0.30 ± 0.14	0.87 ± 0.15	0.82	0.80	0.78	0.75	0.05
FDMad	0.81	0.61	0.57	0.54	0.85	0.89	0.74 ± 0.07	0.38 ± 0.18	0.50 ± 0.34	0.82	0.81	0.81	0.73	0.14
PRESLT	0.82	0.71	0.66	0.64	0.87	0.92	0.62 ± 0.04	0.47 ± 0.11	0.75 ± 0.54	0.82	0.82	0.79	0.59	0.75
Average	0.81 ± 0.15	0.76 ± 0.18	0.75 ± 0.20	0.73 ± 0.21	0.85 ± 0.15	0.89 ± 0.15	0.68 ± 0.14	0.44 ± 0.16	0.71 ± 0.23	0.82 ± 0.16	0.82±	0.84 ± 0.21	0.76 ± 0.28	0.99 ± 0.79

¹Abbreviations are presented in Table 1; “ad”: traits that were adjusted for correlated variables; h²: heritability estimate; GB0: spread of molecular breeding values for GBLUP fitting only G matrix; GB10 and GB20: spread of molecular breeding values for GBLUP fitting G matrix and 10 or 20% of A matrix, respectively; GB2PC, GB4PC and GB6PC: spread of molecular breeding values for GBLUP fitting 2, 4 or 6 principal components, respectively; GBRCV: spread of molecular breeding values for GBLUP and random cross-validation; GBKCV: spread of molecular breeding values for GBLUP for K-means clustering; GBC: spread of molecular breeding values for GBLUP for predictions performed within each cluster; K5EDM: spread of molecular breeding values for GBLUP when animals were clustered based on EDM and assuming 5 subpopulations; K5G: spread of molecular breeding values for GBLUP when animals were clustered based on a distance matrix built from G matrix and assuming 5 subpopulations; K10EDM: spread of molecular breeding values for GBLUP when animals were clustered based on EDM and assuming 10 subpopulations; K10G^a: spread of molecular breeding values for GBLUP when animals were clustered based on a distance matrix built from G matrix and assuming 10 subpopulations

ISSN: 2730-6844