Mating structures for genomic selection breeding programs in aquaculture

Table 2 Effect of sire:dam mating ratio on genetic gains, rates of inbreeding and accuracy of selection with varying numbers of candidates

Sire:dam mating ratio	G ^a_CAND-TRAIT (σ_g)	G ^a_SIB-TRAIT (σ_g)	% SIB-TRAIT	∆F ^b	Acc ^c
Ncand = 3000
TRAD-EBV
1:1	0.36	0.17	32	0.014	0.492
2:2	0.35	0.19	35	0.014	0.503
1:2	0.34	0.16	32	0.011	0.489
10:10	0.34	0.24	41	0.011	0.510
GW-EBV
1:1	0.37	0.35	49	0.010	0.728
2:2	0.36	0.36	50	0.010	0.718
1:2	0.35	0.33	48	0.011	0.716
10:10	0.38	0.35	48	0.011	0.711
Ncand = 6000
TRAD-EBV
1:1	0.39	0.16	29	0.015	0.501
2:2	0.38	0.20	34	0.015	0.504
1:2	0.38	0.16	30	0.011	0.506
10:10	0.39	0.23	37	0.013	0.514
GW-EBV
1:1	0.42	0.37	47	0.008	0.754
2:2	0.42	0.37	47	0.007	0.743
1:2	0.41	0.35	46	0.005	0.738
10:10	0.43	0.37	46	0.005	0.734
Ncand = 12,000
TRAD-EBV
1:1	0.43	0.13	24	0.015	0.490
2:2	0.42	0.19	31	0.014	0.514
1:2	0.42	0.15	26	0.011	0.501
10:10	0.43	0.23	35	0.014	0.518
GW-EBV
1:1	0.44	0.39	47	0.009	0.767
2:2	0.45	0.40	47	0.008	0.761
1:2	0.44	0.40	47	0.007	0.754
10:10	0.46	0.40	46	0.006	0.753

Genetic gain (G) for CAND-TRAIT and SIB-TRAIT, percentage of total genetic gain that comes from the SIB-TRAIT (% SIBTRAIT), rates of inbreeding (∆F) and accuracy of the total merit index of the selection candidates (Acc) in Generation10 for schemes with different number of candidates; 100 sires and 100 dams were selected for schemes with mating ratio 1:1, 2:2 and 10:10 and 100 sires and 200 dams for schemes with mating ratio 1:2; heritability of SIB-TRAIT = 0.25; Ntest = 3000
^aStandard errors between 0.0002 and 0.0006
^bStandard errors between 0.000000 and 0.000006
^cStandard errors between 0.0001 and 0.0004

ISSN: 1297-9686