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Table 1 Growth and body composition traits in pigs from the low or high RFI lines

From: A transcriptome multi-tissue analysis identifies biological pathways and genes associated with variations in feed efficiency of growing pigs

Linea Low RFI High RFI sem P-line
Pigs, n 24 24   
Age (d) 132 131 4 -
Body weight (kg) 77.8 73.3 5.5 0.008
Feed intake (g/d) 2250 2307 106 0.099
Average daily gain (g/d) 882 796 73 <0.001
Gain to feed (G:F) ratio, 77–132 d 0.38 0.35 0.02 <0.001
Dorsal subcutaneous AT thickness (mm) 13.6 14.0 1.03 0.49
Weight of tissues
 Liver (%BW) 2.11 2.32 0.19 <0.001
Longissimus muscle (%BW) 4.39 3.99 0.32 <0.001
 Dorsal subcutaneous AT (%BW) 4.79 5.00 0.78 0.34
 Perirenal AT (%BW) 0.70 0.69 0.12 0.51
  1. aTwo pig lines were divergently selected over eight generations for residual feed intake (RFI). A subset of 48 pigs was tested for performance from 74 days to 132 days of age and used tissue sampling. The resulting phenotype in this subset was an improved gain-to-feed ratio and greater muscularity in pigs from the low RFI line when compared with pigs from the high RFI line. AT Adipose tissue, BW Body weight