Performance measurement
Performance data were collected when the animals
reached 9 to 22 weeks of age. The average daily gain
(ADG) was obtained from the difference between final
weight and initial weight divided by the days fed. Lean
meat percentage (LP) was acquired by determining the
percentage weight of the whole carcass. The loin muscle
area (LMA) was measured between the third and fourth ribs
3 inches away from the midline using an A-mode
ultrasound device (PIGLOG 105), then calculated using the
following equation