Table 2. Broiler performance.

	Heavy		Light			P
Item	CM	HM	CM	HM	SEM	HW	Met	HW × Met
1–21 d
BWG (kg)	0.69a	0.68a	0.64b	0.67ab	0.01	0.008	0.578	0.048
FI (kg)	1.03	1.01	0.97	0.97	0.01	0.027	0.584	0.702
G:F	0.68	0.67	0.66	0.69	0.01	0.801	0.361	0.238
22–42 d
BWG (kg)	1.63a	1.55ab	1.43b	1.66a	0.03	0.488	0.260	0.029
FI (kg)	3.25	3.04	3.02	3.14	0.06	0.548	0.717	0.152
G:F	0.50ab	0.51ab	0.48b	0.53a	0.01	0.725	0.015	0.087
1–42 d
BWG (kg)	2.32a	2.23ab	2.07b	2.32a	0.03	0.265	0.237	0.016
FI (kg)	4.27	4.05	3.99	4.10	0.05	0.294	0.635	0.126
G:F	0.54ab	0.55a	0.52b	0.57a	0.004	0.721	0.007	0.049

Heavy −48.3±0.1 g; Light −41.7±0.1 g; CM - control methionine levels (0.50% and 0.43% methionine during 1–21 d and 22–42 d, respectively); HM - high methionine levels (0.60% and 0.53% methionine during 1–21 d and 22–42 d, respectively); HW - hatching weight.

BWG -body weight gain; FI - feed intake; G:F – gain to feed ratio.

SEM - standard error of the mean.

Within the same row, different superscripts indicate significant differences (P<0.05).