Gut microbiome composition differences among breeds impact feed efficiency in swine

Microbiome

Table 1 Effect of breed on growth, feed efficiency, and fatness traits

	Duroc (DR)		Landrace (LR)		Large White (LW)		Contrasts (p value)		RMSE
	LSM	SE	LSM	SE	LSM	SE	DR vs. (LR+LW)/2	LR vs. LW	RMSE
Efficiency
ADFI, g/d	2185.1	51.27	2213.9	51.9	2396.8	51.7	0.061	0.015	267.4
ADG, g/d	618.4	10.9	627.1	11.1	649.91	11.0	0.142	0.149	56.8
RF1, g	− 4.61	51.38	− 4.90	52.30	21.17	52.50	0.842	0.727	230.3
RF2, g	− 1.00	45.45	− 9.59	46.14	14.84	46.28	0.949	0.710	219.6
FCR	3.56	0.08	3.54	0.08	3.70	0.08	0.530	0.154	0.38
Fatness traits
Back fat, mm	10.33	0.34	11.43	0.34	13.93	0.29	< 0.001	< 0.001	2.36
Loin depth, mm	49.60	0.54	47.97	0.54	46.37	0.50	< 0.001	0.033	4.44
IMF, %	2.04	0.07	1.80	0.07	1.96	0.06	0.065	0.086	0.68

LSM least squares mean, SE standard error, RMSE root mean square error, ADFI average daily feed intake, ADG average daily gain, RF1 residuals calculated regressing ADFI on ADG, RF2 residuals calculated regressing ADFI on ADG and body weight, FCR average feed conversion ratio calculated as the ratio between ADFI and ADG, IMF intramuscular fat

ISSN: 2049-2618