Table 4. Effects of groups categorized by total number and cross sectional area of muscle fiber on carcass and lean meat productivity traits

TNF High Low Levels of significance

CSAF Large Middle Small Large Middle Small
Group HL(n=9) HM(n=33) HS(n=64) LL(n=39) LM(n=61) LS(n=33) TNF CSAF TNF×CSAF
Carcass weight (kg) 88.41a(3.23)A 86.54a(1.70) 79.88bc(1.21) 82.75ab(1.63) 77.86c(1.29) 71.66d(1.71) *** *** NS
Carcass yield (%) 76.97a(1.09) 74.83ab(0.58) 73.89b(0.41) 74.63ab(0.55) 74.12b(0.44) 74.06b(0.58) * NS
Loin area (cm2) 61.69a(1.84) 56.03b(0.97) 48.09c(0.69) 47.86c(0.93) 43.03d(0.74) 38.97e(0.98) *** *** *
Back-fat thickness (mm) 17.24ab(1.87) 18.13a(0.99) 16.21ab(0.70) 16.13ab(0.94) 14.87b(0.75) 11.82c(0.99) ** ** NS
Daily gain (g/day) 611.5b(22.94) 650.4a(12.12) 616.4b(8.62) 622.5ab(11.56) 599.39b(9.16) 552.4c(12.17) ** *** *
Days at 90 kg body weight (kg) 154.5bc(4.41) 145.9c(2.58) 151.2bc(1.72) 148.1c(2.57) 154.8b(1.92) 164.7a(2.35) * ** **
Body weight in 100 days after birth (kg) 45.16bc(1.87) 47.22ab(1.11) 47.63ab(0.75) 49.86a(1.11) 46.88b(0.83) 43.63c(1.02) NS NS **
Plant age (d) 174.59(2.55) 174.6(1.39) 172.7(0.92) 173.1(1.39) 175.6(1.03) 173.7(1.27) NS NS NS