| Autor: |
Carlson, J. P., Christian, L. L., Kuhlers, D. L., Rasmusen, B. A. |
| Zdroj: |
Journal of Animal Science; January 1980, Vol. 50 Issue: 1 p21-28, 8p |
| Abstrakt: |
Thirty-two pigs from seven litters with equal numbers of porcine stress syndrome (PSS) positive and negative pigs within a litter were utilized to assess the effects of PSS on production and carcass traits. Differences between PSS groups for average daily gain and feed efficiency were not significant. Blood creatine phosphokinase (CPK) measured both at 8 to 10 weeks of age and at slaughter was higher (P<.01) for PSS positive pigs, while length of halothane exposure and muscle rigidity scored during halothane exposure were lower. Longissimusmuscle pH measured 45 min postmortem was lower (P<.01) for PSS positive pigs, while Photovolt reflectance color and light trans-mittancy of the longissimusmuscle were greater than for PSS negative animals. Live backfat probe, carcass backfat and tenth rib fat were not significantly different between PSS groups, although PSS positive pigs were leaner in carcass composition, particularly in the ham and shoulder. Longissimusmuscle area was significantly larger for PSS positive pigs and this group also tended to score higher on two indices used to rank breeding stock. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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