Table 3. Breast muscle yield and its DNA, RNA and protein contents.

	Heavy		Light			P
Item	CM	HM	CM	HM	SEM	HW	Met	HW × Met
Yield (%)	18.6a	18.0ab	17.2b	18.7a	0.2	0.487	0.318	0.042
DNA(mg/g)	1.75b	1.78ab	2.05a	1.59b	0.05	0.542	0.034	0.018
RNA(mg/g)	2.43	2.90	2.14	2.39	0.10	0.062	0.088	0.606
Protein(mg/g)	82.9	82.5	81.4	81.5	1.5	0.690	0.957	0.922
RNA/protein	0.030	0.035	0.027	0.030	0.001	0.125	0.131	0.659
RNA/DNA	1.39a	1.64a	1.05b	1.50a	0.05	0.032	0.003	0.348
Protein/DNA	47.7ab	46.7ab	40.7b	51.7a	1.4	0.709	0.079	0.039

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.

SEM - standard error of the mean.

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