Table 3. Cumulative feed conversion ratio (g of feed:g of BW gain) of University of Alberta Meat Control (AMC) strains unselected since 1957 and 1978, and Ross 308 broilers (2005).

Age (d)	AMC-1957	SEM	AMC-1978	SEM	2005	SEM	P-value
0 to 7	2.553a	0.258	1.382b	0.030	1.108c	0.026	<0.0001
0 to 14	3.300a	0.362	1.506b	0.019	1.275c	0.017	<0.0001
0 to 21	3.188a	0.170	1.608b	0.013	1.379c	0.006	<0.0001
0 to 28	3.084a	0.093	1.706b	0.019	1.483c	0.008	<0.0001
0 to 35	3.003a	0.118	1.832b	0.030	1.573c	0.012	<0.0001
0 to 42	2.882a	0.101	1.899b	0.026	1.674c	0.012	<0.0001
0 to 49	2.871a	0.103	2.018b	0.017	1.808c	0.018	<0.0001
0 to 56	2.854a	0.096	2.135b	0.037	1.918c	0.015	<0.0001

^a–cMeans within rows with no common superscript differ significantly (P < 0.05).