Abstract
SUMMARY Landrace pigs can be divided into those which are sensitive to halothane and develop pale, soft, exudative pork (PSE) post mortem (MH/PSE), those which are resistant to halothane but develop PSE (PSE) and those resistant to halothane and PSE (normal). Muscle characteristics of PSE and normal pigs are indistinguishable under thiopentone anaesthesia and differ only in pH after slaughter. Muscle from MH/PSE pigs has significantly higher glucose-6-phosphate levels and lower phosphocreatine under thiopentone anaesthesia than PSE and normal muscle. Exposing MH/PSE pigs to halothane anaesthesia exaggerates these differences. PSE pigs showed decreased daily liveweight gain compared with MH/PSE pigs while normal pigs had the greatest daily gain.
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