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Table 6 Effects of dietary protein/energy ratio and breed on muscle chemical composition in pigs, %

From: Effects of dietary protein/energy ratio on growth performance, carcass trait, meat quality, and plasma metabolites in pigs of different genotypes

Item Landrace pig Bama mini-pig SEM P-value
GB diets NRC diets GB diets NRC diets Breed Diet B × D
Nursery phase         
   Longissimus dorsi muscle         
      Dry matter 23.75 23.68 23.61 24.09 0.33 0.69 0.55 0.41
      Intramuscular fat 1.22b 1.06b 2.82a 3.54a 0.26 <0.001 0.30 0.10
      Crude protein 18.34b 19.69a 19.47a 19.61a 0.36 0.17 0.05 0.11
   Biceps femoris muscle         
      Dry matter 22.11bc 21.39c 23.39a 23.15ab 0.42 0.001 0.26 0.57
      Intramuscular fat 0.86c 0.99c 3.25a 2.45b 0.22 <0.001 0.14 0.05
      Crude protein 17.60bc 16.49c 18.51ab 19.01a 0.40 <0.001 0.46 0.05
   Psoas major muscle         
      Dry matter 22.21 22.42 21.77 22.37 0.35 0.50 0.27 0.59
      Intramuscular fat 0.89b 0.94b 2.48a 2.32a 0.20 <0.001 0.78 0.62
      Crude protein 16.94b 17.41b 17.72ab 18.56a 0.35 0.01 0.09 0.63
Growing phase         
   Longissimus dorsi muscle         
      Dry matter 25.07b 25.05b 29.11a 27.37a 0.63 <0.001 0.24 0.25
      Intramuscular fat 1.16b 1.50b 3.73a 3.50a 0.34 <0.001 0.89 0.48
      Crude protein 21.27b 20.77b 21.98ab 22.73a 0.39 0.007 0.79 0.18
   Biceps femoris muscle         
      Dry matter 23.15b 22.89b 26.79a 23.76b 0.75 0.01 0.05 0.10
      Intramuscular fat 1.01b 0.81b 2.77a 1.68b 0.30 <0.001 0.05 0.17
      Crude protein 19.80b 19.24b 22.13a 19.35b 0.71 0.13 0.04 0.16
   Psoas major muscle         
      Dry matter 23.67c 23.68c 26.78a 24.97b 0.36 <0.001 0.04 0.03
      Intramuscular fat 1.06b 1.19b 4.66a 2.25b 0.36 <0.001 0.01 0.005
      Crude protein 19.82 20.17 21.07 20.84 0.51 0.10 0.91 0.62
Finishing phase         
   Longissimus dorsi muscle         
      Dry matter 26.16c 26.56bc 28.74a 28.26ab 0.58 0.004 0.95 0.50
      Intramuscular fat 2.59b 2.48b 5.85a 4.50a 0.44 <0.001 0.15 0.22
      Crude protein 21.32 22.02 21.73 21.93 0.47 0.76 0.40 0.64
   Biceps femoris muscle         
      Dry matter 24.97b 25.18b 25.43b 28.93a 0.77 0.02 0.04 0.07
      Intramuscular fat 1.42c 1.88c 3.65b 5.23a 0.31 <0.001 0.01 0.12
      Crude protein 20.84ab 21.19ab 19.41b 22.85a 0.81 0.90 0.05 0.10
   Psoas major muscle         
      Dry matter 25.47 24.70 26.42 26.04 0.57 0.10 0.40 0.77
      Intramuscular fat 2.46b 2.43b 4.01a 4.00a 0.38 0.002 0.96 0.97
      Crude protein 21.08 21.30 20.70 20.91 0.48 0.51 0.71 0.99
  1. a, b, cMean values with unlike superscript letters were significantly different (P < 0.05). n = 8
  2. GB diets, Chinese conventional diets; B × D, breed × diet interaction