Table 2.

Descriptive statistics of phenotypic traits and differences between the fat and lean broiler lines at different generations and at the combined generation.

Traits	G22				G23				G22+G23
	Line	LSM	SE	P-value	Line	LSM	SE	P-value	Line	LSM	SE	P-value
BW4(g)	Lean	891.73	5.47	<0.0001	Lean	791.23	5.00	0.0002	Lean	840.35	3.80	<0.0001
	Fat	776.30	5.93		Fat	759.53	6.93		Fat	763.61	4.65
BW7(g)	Lean	1,895.85	12.11	0.066	Lean	1,855.04	10.09	0.6922	Lean	1,875.12	7.85	0.161
	Fat	1,870.61	13.13		Fat	1,848.12	14.00		Fat	1,847.35	9.62
BWG(g)	Lean	971.13	8.87	<0.0001	Lean	1,058.17	6.46	0.0002	Lean	1,019.10	5.41	<0.0001
	Fat	1,115.63	9.38		Fat	1,100.61	9.03		Fat	1,109.55	6.78
MMBW(g)	lean	227.89	1.03	<0.0001	Lean	219.21	0.89	0.1022	Lean	223.46	0.68	<0.0001
	fat	217.91	1.11		Fat	216.71	1.24		Fat	216.92	0.84
FI(g)	lean	2,488.52	20.68	<0.0001	Lean	2,567.27	17.04	<0.0001	Lean	2,530.94	13.47	<0.0001
	fat	3,159.15	22.47		Fat	2,049.92	23.64		Fat	3,113.86	16.51
FIT(g)	lean	2,658.70	19.66	<0.0001	Lean	2,722.25	14.47	0.1742	Lean	2,694.83	12.43	<0.0001
	fat	2,957.00	21.32		Fat	2,756.16	20.22		Fat	2,870.38	15.27
FCR	lean	2.49	0.01	<0.0001	Lean	2.41	0.01	<0.0001	Lean	2.45	0.01	<0.0001
	fat	2.94	0.01		Fat	2.81	0.01		Fat	2.88	0.01
RFI(g)	lean	−162.04	13.75	<0.0001	Lean	−160.08	7.96	<0.0001	Lean	−167.22	7.83	<0.0001
	fat	193.11	14.93		Fat	296.30	11.05		Fat	239.92	9.57
AFW(g)	lean	9.21	0.08	<0.0001	Lean	9.69	0.59	<0.0001	Lean	9.40	0.48	<0.0001
	fat	102.84	0.85		Fat	104.88	0.82		Fat	104.06	0.59
AFP(%)	lean	0.52	0.04	<0.0001	Lean	0.51	0.03	<0.0001	Lean	0.51	0.02	<0.0001
	fat	5.48	0.04		Fat	5.62	0.04		Fat	5.56	0.03

Abbreviations: AFW, abdominal fat weight at week 7; AFP, abdominal fat percentage at week 7; BW4, body weight at week 4; BW7, body weight at week 7; BWG, body weight gain; FCR, feed conversion ratio; FI, feed intake; FIT, feed intake in theory; LSM, least square means; MMBW, mid-test metabolic body weight; RFI, residual feed intake from week 4 to week 7.