Table 4. The content of volatile flavor substances in three parts of muscle

Items (%)	Groups			p-value
Items (%)	LD	PM	BF	p-value
Aldehydes	62.94±5.997	64.39±0.428	57.33±8.095	0.356
Pentanal	0.24±0.051	0.64±0.333	0.36±0.117	0.131
2-Thiophene formaldehyde	0.21±0.059^b	0.75±0.095^a	0.32±0.656^a	<0.001
Hexanal	4.28±0.144^c	7.30±0.460^a	6.13±0.254^b	<0.001
Heptanal	4.67±0.879	5.09±0.511	3.84±0.421	0.124
Octanal	3.65±0.445^a	3.43±0.235^a	2.85±0.202^b	0.049
Nonanal	13.78±0.677^a	9.62±0.652^b	12.37±0.928^a	0.002
Methylthiopropionaldehyde	ND	0.26±0.046	0.43±0.252	-
Decanal	1.39±0.300^a	0.66±0.055^b	0.51±0.060^c	0.002
Benzaldehyde	21.24±3.623^b	26.89±0.206^a	21.40±1.003^a	0.031
2-Decenal,(E)	2.17±0.089^c	3.57±0.115^b	3.65±0.061^a	<0.001
2-Undecenal	3.72±0.498^a	2.59±0.500^b	3.11±0.245^a	0.049
2-Phenyl-2-butylenaldehyde	0.79±0.055	ND	0.77±0.131	-
(E,E)-2,4-heptadienal	0.73±0.305^b	0.58±0.036^b	0.97±0.060^a	0.001
Pentadecanal	1.26±0.350^a	0.54±0.120^b	0.68±0.064^b	0.014
Hexadecanal	9.35±0.291^a	2.53±0.325^b	3.86±0.127^c	<0.001
Alcohols	6.60±0.801^b	9.11±0.367^a	6.53±0.332^b	0.002
1-Pentanol	0.78±0.078^b	1.02±0.076^a	0.41±0.031^c	<0.001
1-Hexanol	0.44±0.099^b	0.72±0.066^a	0.41±0.031^b	0.003
2-Furanmethanol	0.37±0.097	1.34±0.061	ND	-
1-Octen-3-ol	1.55±0.387^c	2.21±0.125^b	2.38±0.097^a	0.012
Heptanol	0.93±0.119^b	1.31±0.070^a	0.75±0.157^c	0.004
Octanol	1.86±0.211^a	1.96±0.060^a	0.75±0.157^b	<0.001
(E)-2-Octene-1-ol	0.67±0.721	0.55±0.047	0.53±0.096	0.117
Ketones	1.72±0.180^c	2.51±0.165^a	2.33±0.110^b	0.002
2-Pentadecanone	0.58±0.085^b	0.53±0.057^b	0.74±0.101^a	0.044
3-Hexanone	0.13±0.045^c	0.36±0.081^b	0.44±0.049^a	0.002
2,3-Octanedione	0.78±0.082^b	1.45±0.096^a	0.90±0.144^a	0.001
6-Methyl-5-hepten-2-one	0.23±0.061	0.29±0.060	0.25±0.035	0.426
Hydrocarbons	5.78±0.700	5.82±0.180	5.63±0.474	0.331
Heptylbenzene	1.99±0.125^a	1.02±0.026^b	1.41±0.248^a	0.035
Xylene	1.76±0.371^a	1.25±0.060^b	0.70±0.099^c	0.004
Octylbenzene	1.17±0.154^b	1.14±0.072^b	1.85±0.901^a	0.001
Nonylbenzene	0.86±0.146	1.14±0.072	1.07±0.140	0.073
Hexadecane	ND	1.03±0.176	0.60±0.056	-
Esters	0.47±0.129^c	1.03±0.110^a	0.86±0.061^b	0.007
2-Ethyl ethyl acetate	ND	0.12±0.050	0.27±0.064	-
Methyl diethyldithiocarbamate	0.47±0.129^b	0.91±0.131^a	0.60±0.012^a	0.006
Others	9.94±1.023	9.34±0.793	8.15±0.475	0.081
2-(pentenyl) furan	1.50±0.280^b	5.41±0.720^a	4.03±0.243^a	<0.001
2-Acetyl thiazole	0.15±0.0252^c	0.45±0.111^b	0.48±0.090^a	0.006
trans-2-(Pentenyl)furan	1.40±0.627	1.23±0.326	1.20±0.247	0.832
2-Acetyl pyrrole	1.49±0.148	1.30±0.303	1.50±0.295	0.594
Acetoin	3.60±0.246^b	0.64±0.061^a	0.64±0.180^a	<0.001
Dimethyl disulphide	0.18±0.030^a	0.13±0.031^b	0.12±0.021^b	0.048
Dimethyl trisulfide	0.27±0.021^a	0.18±0.012^b	0.21±0.558^a	0.015

Means within a row with different subscripts differ when p-value<0.05.
LD, longissimus dorsi; PM, psoas major; BF, biceps femoris; ND, not detected.