Table 8. Effect of fattening period on fatty acid of longissimus dorsi muscle in Holstein steers

Fatty acid (%)	20 mon	21 mon	22 mon	23 mon	24 mon	SEM	p-value¹⁾
C_14:0	3.47	3.38	3.47	3.14	3.03	0.16	0.2565
C_14:1	1.19	0.98	1.14	0.90	0.89	0.12	0.4083
C_15:0	0.31	0.30	0.31	0.29	0.29	0.02	0.9401
C_15:1	0.08	0.06	0.07	0.07	0.07	0.01	0.7391
C_16:0	28.07	28.12	26.13	28.29	25.98	1.09	0.4300
C_16:1	4.70	4.32	5.07	4.34	4.47	0.26	0.3257
C_17:0	0.74	0.72	0.85	0.72	0.82	0.07	0.5274
C_17:1	0.08	0.08	0.08	0.08	0.08	0.01	0.8293
C_18:0	11.11	11.89	11.87	11.10	11.44	0.67	0.8547
C_18:1	47.39	47.25	48.07	48.00	49.29	0.81	0.4365
C_18:2	2.661^ab	2.47^b	2.57^ab	2.79^ab	3.22^a	0.22	0.1745
C_18:3	0.05^b	0.05^b	0.09^a	0.04^b	0.06^ab	0.01	0.1571
C_20:0	0.09	0.11	0.12	0.11	0.12	0.02	0.7967
C_20:3	0.05	0.13	0.13	0.08	0.13	0.03	0.4735
C_20:4	0.05	0.21	0.25	0.15	0.17	0.06	0.2893
SFA	43.78	44.49	42.74	43.65	41.67	1.02	0.3842
MUFA	53.43	52.70	54.43	53.38	54.81	0.92	0.5157
UFA	56.22	55.51	57.26	56.35	58.33	1.02	0.3842
M/S	1.23	1.19	1.28	1.23	1.32	0.05	0.4226
U/S	1.29	1.25	1.35	1.29	1.41	0.06	0.3888

Probability of the F-test.
Means in the same row with different superscripts are significantly different (p < 0.05).
SFA, saturated fatty acid, MUFA, monounsaturated fatty acid, UFA, unsaturated fatty acid, M/S, monounsaturated fatty acid/saturated fatty acid, U/S, unsaturated fatty acid/saturated fatty acid.