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Table 1 Studied traits in the French and Dutch pedigrees

From: Combining two Meishan F2 crosses improves the detection of QTL on pig chromosomes 2, 4 and 6

Pedigree Trait N Mean SD
French birth weight (kg) 1052 1.25 0.27
French weaning weight (kg) 1052 5.46 1.13
French teat number 1046 14.82 1.56
French carcass weight (kg) 529 59.11 10.48
French BFT (mm) 521 17.00 5.00
French LD depth (mm) 521 35.00 9.00
French meat percentage (%) 521 50.44 3.66
French LWG (kg/day) 960 0.49 0.10
French IMF (%) 248 1.69 0.54
French X2 (mm) 521 17.80 5.22
French shoulder weight (kg) 489 4.71 0.84
French midriff weight (kg) 489 1.16 0.33
French ham weight (kg) 489 5.79 0.92
French loin weight (kg) 489 8.07 1.46
French leaf fat weight (kg) 489 0.42 0.23
French foot weight (kg) 489 1.03 0.22
French belly weight (kg) 489 2.96 0.65
French kidney weight (kg) 487 0.11 0.02
French head weight (kg) 481 4.81 0.82
Dutch birth weight (kg) 867 1.22 0.22
Dutch weaning weight (kg) 864 8.23 2.00
Dutch teat number 869 15.42 1.20
Dutch carcass weight (kg) 548 70.24 9.59
Dutch BFT (mm) 565 22.19 5.70
Dutch LD depth (mm) 563 40.82 6.72
Dutch meat percentage (%) 565 48.53 4.25
Dutch LWG (kg/day) 551 0.53 0.08
Dutch IMF (%) 557 1.87 0.88
Dutch pH_24 (LD) 565 5.67 0.27
Dutch L* 563 53.85 4.73
Dutch a* 565 17.13 1.83
Dutch b* 565 9.52 1.91
Dutch pH_24 (ham) 565 5.83 0.32
Dutch driploss (%) 563 2.68 1.52
Dutch cookloss (%) 564 26.35 3.46
Dutch shear force (N) 564 39.20 10.75
  1. Traits indicated in bold are common to the two independent pedigrees; N = number of analysed F2 for the corresponding trait; SD = Standard Deviation; BFT = Back-Fat Thickness (referred as X4 in [8]); LD = Longissimus Dorsi; LWG = Life Weight Gain; IMF = IntraMuscular Fat content; X2 is another measurement of back-fat thickness; pH_24 = pH measured 24 h after slaughter; a* = meat redness; b* = meat yellowness; L* = meat lightness