Table 5.

Effect of genotype, sex, and diet on breast skin color and PM color.

Genotype	Sex	Diet	Skin color			Meat color
			L∗	a∗	b∗	L∗	a∗	b∗
Ross	Male	C	67.71	3.89B	15.11B,C,D,E	50.02	−0.67	7.82
		LP	64.27	2.08C,D,E	10.99F	47.82	0.60	12.49
	Female	C	64.92	3.28B,C	13.61C,D,E,F	52.35	−0.69	8.30
		LP	66.99	5.97A	19.85A	49.95	0.64	13.08
JA757	Male	C	64.53	0.83D,E,F	13.08D,E,F	49.14	−1.02	6.61
		LP	62.64	2.33B,C,D	18.90A,B	47.38	0.10	11.01
	Female	C	60.41	1.11D,E,F	11.53E,F	52.99	−1.27	6.88
		LP	58.25	0.44E,F	15.02B,C,D,E	47.34	0.74	12.21
ISA Dual	Male	C	68.56	0.46E,F	13.23C,D,E,F	59.21	−2.36	7.84
		LP	71.02	1.09D,E,F	17.53A,B,C	53.81	−0.99	13.46
	Female	C	65.66	0.28F	11.31E,F	58.38	−1.60	9.16
		LP	62.45	0.33F	16.64A,B,C,D	55.31	−0.42	15.74
SEM			0.61	0.22	0.47	0.49	0.11	0.31
P-value
Genotype			<0.001	<0.001	0.963	<0.001	<0.001	<0.001
Sex			0.003	0.721	0.860	0.039	0.076	0.006
Diet			0.351	0.246	<0.001	<0.001	<0.001	<0.001
G∗S∗D			0.121	<0.001	0.007	0.204	0.360	0.864

^A–FValues in the same subgroup of variables with different superscripts differ (P ≤ 0.01).

Abbreviations: C, control group fed a conventional diet for growing chickens; D, diet; G, genotype; LP, chickens fed a low-protein diet; S, sex.