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

Table 8 The ratio, K, of expected (assuming accuracies of molecular breeding values for each scenario) spread to observed spread of molecular breeding values for carcass traits

Trait¹	GB0	GB2PC	GB4PC	GB6PC	GB10	GB20	GBRCV	GBKCV	GBC	k5EDM	k5G	k10EDM	K10G1	K10G2
CCWT	0.94	0.86	0.84	0.78	0.98	1.03	0.59 ± 0.02	0.48 ± 0.09	1.05 ± 0.82	0.93	0.92	1.03	0.63	1.21
HCWT	0.99	0.92	0.91	0.84	1.04	1.09	0.61 ± 0.02	0.49 ± 0.08	1.09 ± 0.85	1.00	0.99	1.07	0.66	1.26
SFXWT	1.02	0.93	0.89	0.82	1.06	1.11	0.61 ± 0.03	0.48 ± 0.13	1.25 ± 1.04	1.02	1.02	1.15	0.73	1.33
DRESS	1.36	1.36	1.48	1.44	1.42	1.49	0.85 ± 0.04	0.79 ± 0.07	1.85 ± 0.33	1.37	1.36	1.54	1.45	1.77
CBUTT	1.04	1.02	1.00	0.92	1.09	1.16	0.69 ± 0.02	0.62 ± 0.05	1.06 ± 0.56	1.05	1.03	1.09	0.82	1.33
CBUTTad	1.23	1.21	1.16	1.07	1.29	1.37	0.73 ± 0.08	0.59 ± 0.03	1.39 ± 0.44	1.22	1.21	1.17	1.36	1.32
CGRM	1.03	0.78	0.82	0.84	1.07	1.13	0.62 ± 0.02	0.42 ± 0.09	0.90 ± 0.33	1.04	1.03	1.07	0.87	1.15
CGRMad	1.11	0.85	0.84	0.79	1.16	1.22	0.65 ± 0.04	0.55 ± 0.07	1.43 ± 0.84	1.11	1.11	1.24	1.03	2.34
SFFORE	1.07	1.01	0.97	0.88	1.12	1.17	0.58 ± 0.05	0.51 ± 0.15	1.43 ± 0.93	1.06	1.07	1.20	0.99	1.15
SFLEG	1.19	1.01	1.05	0.96	1.25	1.32	0.58 ± 0.03	0.51 ± 0.09	1.42 ± 0.95	1.20	1.18	1.43	0.83	1.83
SFMID	0.98	0.81	0.81	0.77	1.03	1.08	0.63 ± 0.03	0.43 ± 0.14	0.65 ± 0.63	0.98	0.98	1.01	0.54	1.02
SFRIB	0.89	0.89	0.89	0.89	0.94	0.99	0.41 ± 0.05	0.40 ± 0.07	1.34 ± 1.09	0.88	0.89	1.03	1.53	0.49
Average	1.07 ± 0.12	0.97 ± 0.16	0.97 ± 0.18	0.91 ± 0.17	1.12 ± 0.13	1.18 ± 0.13	0.63 ± 0.09	0.52 ± 0.10	1.24 ± 0.29	1.07 ± 0.12	1.07 ± 0.12	1.17 ± 0.15	0.95 ± 0.30	1.35 ± 0.42

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