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Table 1 Means and standard deviations of traits related to muscle fibre size and distribution, muscularity and meat quality measured in M. longissimus dorsi at 13th/14th rib on F2 animals of the DUMI resource population

From: QTL for microstructural and biophysical muscle properties and body composition in pigs

  Trait Definition Mean ± SD
1 Fib/mm2 mean number of fibres per mm2 366 ± 99
  ToF# total number of fibres at section of M. l. d. [×1000] 803.5 ± 203.5
  Diamean mean diameter of all fibres [μm] 58.52 ± 7.93
  DiaAnF mean diameter of angular fibres [μm] 23.27 ± 7.09
  DiaGiF mean diameter of giant fibres [μm] 14.05 ± 34.47
  ProAnF relative proportion of angular fibres [%] 0.90 ± 0.94
  ProGiF relative proportion of giant fibres [%] 0.05 ± 0.19
  DiaSTO/red mean diameter of STO/red fibres [μm] 50.98 ± 7.13
  DiaFTO/im mean diameter of FTO/intermediate fibres [μm] 50.19 ± 8.24
  DiaFTG/w mean diameter of FTG/white fibres [μm] 62.32 ± 9.32
  ProSTO/red relative proportion of STO/red fibres [%] 18.68 ± 6.19
  ProFTO/im relative proportion of FTO/intermediate fibres [%] 11.34 ± 4.23
  ProFTG/w relative proportion of FTG/white fibres [%] 69.02 ± 6.49
2 DiaSTO mean diameter of STO fibres [μm] 51.60 ± 7.01
  DiaFTO mean diameter of FTO fibres [μm] 49.31 ± 7.44
  DiaFTG mean diameter of FTG fibres [μm] 61.91 ± 9.19
  ProSTO relative proportion of red fibres [%] 15.93 ± 5.40
  ProFTO relative proportion of intermediate fibres [%] 12.35 ± 4.34
  ProFTG relative proportion of white fibres [%] 71.34 ± 6.90
  CapSTO mean number of capillaries at STO fibre 1.48 ± 0.46
  CapFTO mean number of capillaries at FTO fibre 0.96 ± 0.34
  CapFTG mean number of capillaries at FTG fibre 0.55 ± 0.17
  Capmean mean number of capillaries at fibres 0.75 ± 0.23
  Cap/mm2 mean number of capillaries per mm2 82.19 ± 21.86
3 Diared mean diameter of red fibres [μm] 50.47 ± 7.21
  Diaim mean diameter of intermediate fibres [μm] 50.91 ± 8.81
  Diaw mean diameter of white fibres [μm] 62.66 ± 9.44
  Prored relative proportion of red fibres [%] 20.95 ± 5.90
  Proim relative proportion of intermediate fibres [%] 10.50 ± 3.98
  Prow relative proportion of white fibres [%] 67.11 ± 5.45
4 FOM Fat-O-Meater: lean meat content according to regression 33.74 ± 8.62
  FOM_M FOM_meat: depth of M. glutaeus medius 40.01 ± 8.71
  MAML loin eye area: area of M. l. d. at 13th/14th rib [cm2] 23.30 ± 4.38
  pH1ML pH1-loin: pH-value 45 min post mortem 6.46 ± 0.25
  pH24ML pH24-loin: pH-value 24 hours post mortem 5.56 ± 0.13
  C1ML conductivity1-loin: conductivity 45 min post mortem [mS/cm] 3.44 ± 0.53
  C24ML conductivity24-loin: conductivity 24 hours post mortem [mS/cm] 3.49 ± 1.22
  MCOpto meat colour, Opto Star: meat colour 24 hours post [%] 69.40 ± 6.29
  1. 1fibre number and size, fibre type proportions determined by NADH-TR alone and combined NADH-TR/ATPase reaction (n = 308)
  2. 2fibre size, fibre type proportions determined by combined NADH-TR/ATPase reaction (n = 140)
  3. 3fibre size, fibre type proportions determined by NADH-TR reaction (n = 168)
  4. 4carcass and meat quality traits of standard performance test (n = 863) [ZDS]