Skip to main content

Table 2 Intra-line effects of white striping on breast pectoralis major muscle traits expressed as LSMeans ± Standard error

From: Genetic parameters of white striping in relation to body weight, carcass composition, and meat quality traits in two broiler lines divergently selected for the ultimate pH of the pectoralis major muscle

   pHu+ pHu-
  N NORM (Nmax = 234) MOD (Nmax = 289) SEV (Nmax = 162) NORM (Nmax = 431) MOD (Nmax = 206) SEV (Nmax = 27)
L* 920 45.2 ± 0.3b 45.9 ± 0.2ab 46.4 ± 0.3a 52.3 ± 0.2b 53.5 ± 0.2a 52.4 ± 0.7ab
a* 903 −0.21 ± 0.04 −0.18 ± 0.04 −0.24 ± 0.05 0.12 ± 0.03 −0.03 ± 0.04 −0.12 ± 0.13
b* 921 10.2 ± 0.09 10.4 ± 0.08 10.5 ± 0.11 12.1 ± 0.07 12.3 ± 0.09 12.1 ± 0.28
pH15 595 6.73 ± 0.008 6.73 ± 0.008 6.75 ± 0.009 6.67 ± 0.006 6.68 ± 0.008 6.67 ± 0.025
pHu 1,344 6.11 ± 0.008 6.13 ± 0.007 6.13 ± 0.01 5.66 ± 0.006b 5.69 ± 0.009a 5.72 ± 0.02ab
DL (%) 1,273 1.8 ± 0.08b 2.2 ± 0.08ab 2.3 ± 0.10a 4.0 ± 0.06 4.1 ± 0.09 4.1 ± 0.25
CL (%) 593 8.6 ± 0.20b 9.2 ± 0.18ab 9.5 ± 0.22a 10.6 ± 0.15 11.0 ± 0.18 11.8 ± 0.57
CCY (%) 556 86.0 ± 0.40 86.3 ± 0.36 86.2 ± 0.43 84.1 ± 0.31 82.9 ± 0.37 82.2 ± 1.16
SF (N/cm2) 594 11.3 ± 0.25 11.2 ± 0.23 11.0 ± 0.27 16.2 ± 0.19 15.8 ± 0.23 15.9 ± 0.72
IMF (%) 597 1.3 ± 0.03c 1.4 ± 0.03b 1.7 ± 0.04a 1.3 ± 0.03b 1.6 ± 0.03a 1.8 ± 0.10a
TBARS 592 0.27 ± 0.04 0.31 ± 0.03 0.35 ± 0.04 0.53 ± 0.03 0.47 ± 0.03 0.42 ± 0.10
  1. pHu + broiler line selected for high value of ultimate pH, pHu- broiler line selected for low value of ultimate pH
  2. NORM normal breast fillets, MOD breast fillets moderately affected by white striping, SEV breast fillets severely affected by white striping. L* Lightness a* = Redness, b* Yellowness, pH15 pH at 15 min post-mortem, pHu Ultimate pH, DL Drip loss, CL Cooking loss, CCY Curing-cooking yield, SF Shear force, IMF Intramuscular fat content, TBARS Thiobarbituric acid reactive substances index expressed as mg of malonedialdehyde per kg of meat
  3. Nmax indicates the maximum number of observations per category
  4. a,b,c Different superscripts in different columns indicate significant intra-line differences between categories of white striping