Table 4. Least square means (±SD) of ten major primal cuts yields according to slaughter age

Item	Slaughter age (month)
Item	25 ≥ (n=15)	26–27 (n=87)	28–29 (n=96)	30–31 (n=106)	32–33 (n=71)	34 ≤ (n=28)
Tenderloin (kg)	5.49±0.39^c	5.98±0.60^b	6.01±0.63^b	6.12±0.61^ab	6.12±0.61^ab	6.34±0.70^a
Sirloin (kg)	31.43±2.88^c	34.32±3.60^b	34.62±3.89^b	35.35±3.48^ab	35.63±4.27^ab	36.58±3.65^a
Strip loin (kg)	7.86±0.62^b	8.61±0.96^a	8.76±1.18^a	8.79±1.00^a	9.00±1.08^a	9.08±1.07^a
Chuck (kg)	13.92±1.72^b	15.22±2.41^a	15.64±2.22^a	15.99±2.13^a	15.84±2.59^a	16.35±2.92^a
Shoulder (kg)	22.37±1.71^c	24.09±2.65^b	24.62±2.71^ab	25.16±2.35^ab	25.03±2.68^ab	25.67±3.35^a
Bottom round (kg)	20.93±1.50^c	22.67±2.51^b	23.16±2.58^ab	23.26±2.43^ab	23.5±2.63^ab	24.08±2.91^a
Top round (kg)	31.70±2.98^c	35.45±3.93^b	35.81±3.91^b	36.61±3.78^ab	36.78±4.12^ab	37.71±4.14^a
Brisket (kg)	40.88±4.13^b	43.95±5.12^a	45.74±5.24^a	45.83±5.27^a	45.70±5.44^a	45.94±6.15^a
Shank (kg)	18.93±1.81^b	20.72±2.32^a	20.63±2.41^a	20.97±2.32^a	21.05±2.39^a	21.46±2.94^a
Rib (kg)	67.09±8.48^b	70.22±7.86^ab	71.43±8.37^a	74.29±8.95^a	73.75±9.41^a	72.43±9.42^a

Means within the same row with different superscripts are statistically different (p < 0.05).