Comparative Study on Muscle Fiber Types of Longissimus Dorsi of Xinjiang Brown Cattle and Angus Cattle of Different Months

Table 3

Comparison of different types of muscle fiber density between the same month of Xinjiang brown cattle and Angus cattle of longissimus dorsi muscle. Bc means Xinjiang Brown cattle and An means Angus cattle. Type I is dark, type IIa and type IIb are light, and type IIx is gray.

Age (m)	Breed	Type I (ATP)	Type IIa (SDH)	Type IIb (SDH)	Type IIx (ATP)
3	Bc	178.64 ± 8.77	163.87 ± 7.13	94.05 ± 7.92^a	98.39 ± 7.48^a
	An	188.01 ± 7.36	152.85 ± 5.99	169.76 ± 6.65^b	160.30 ± 6.28^b
7	Bc	113.28 ± 9.52	74.34 ± 6.25	66.91 ± 5.62	99.47 ± 8.36
	An	136.19 ± 10.39	72.97 ± 5.57	71.18 ± 5.43	109.67 ± 8.37
12	Bc	107.79 ± 17.60	59.06 ± 9.65	62.06 ± 10.13	86.09 ± 14.06
	An	120.48 ± 21.40	49.78 ± 8.848	54.45 ± 9.67	84.30 ± 14.97
24	Bc	52.53 ± 10.09	50.32 ± 9.67	75.80 ± 14.56	57.32 ± 11.01
	An	83.58 ± 7.08	52.06 ± 4.41	81.33 ± 6.89	74.03 ± 6.27

In the same age, different groups marked different low case letters indicating statistical differences at P < 0.05. Different uppercase letters indicate statistical differences at (P < 0.01), and unmarked indicate statistical differences at (P > 0.05).