Table 2.

Association of IGF1 Exon 3 Sequences with Growth and Carcass Traits in New Zealand Romney Sheep

Traita	Variant	n		Mean ± SEb		p
		Absent	Present	Absent	Present
Birth weight (kg)	A2	209	506	5.68 ± 0.07	5.77 ± 0.05	0.255
	B2	144	571	5.78 ± 0.08	5.74 ± 0.05	0.659
Growth rate to weaning (grams/day)	A2	209	506	390.1 ± 5.13	387.0 ± 3.68	0.532
	B2	144	571	396.0 ± 5.44	384.9 ± 3.77	0.048
HCW (kg)	A2	127	316	16.74 ± 0.23	17.21 ± 0.20	0.015
	B2	93	350	17.22 ± 0.25	17.02 ± 0.20	0.350
V-GR (mm)	A2	127	316	7.04 ± 0.32	7.84 ± 0.27	0.003
	B2	93	350	7.82 ± 0.34	7.52 ± 0.27	0.316
Shoulder yield (%)	A2	127	316	17.01 ± 0.10	17.18 ± 0.09	0.052
	B2	93	350	17.13 ± 0.11	17.12 ± 0.09	0.974
Loin yield (%)	A2	127	316	14.83 ± 0.10	14.92 ± 0.09	0.316
	B2	93	350	14.90 ± 0.11	14.90 ± 0.09	0.869
Leg yield (%)	A2	127	316	22.19 ± 0.14	22.13 ± 0.12	0.591
	B2	93	350	22.17 ± 0.15	22.15 ± 0.12	0.857
Total yield (%)	A2	127	316	54.03 ± 0.29	54.22 ± 0.24	0.415
	B2	93	350	54.20 ± 0.31	54.15 ± 0.24	0.874
Proportion shoulder yield (%)	A2	127	316	31.49 ± 0.13	31.68 ± 0.11	0.080
	B2	93	350	31.61 ± 0.14	31.63 ± 0.11	0.843
Proportion loin yield (%)	A2	127	316	27.44 ± 0.11	27.50 ± 0.09	0.505
	B2	93	350	27.49 ± 0.11	27.48 ± 0.09	0.918
Proportion leg yield (%)	A2	127	316	41.06 ± 0.12	40.81 ± 0.10	0.012
	B2	93	350	40.90 ± 0.13	40.89 ± 0.10	0.900

^aHCW—hot carcass weight; V-GR—VIAscan fat depth at the 12th rib.

^bPredicted means and standard error of those means derived from GLMMs, with various factors being included in the models for different traits as described in the Materials and Methods section. p < 0.05 are in bold, whereas 0.05 ≤ p < 0.10 are italicized.

GLMMs, General Linear Mixed-Effects Models.