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Lipid mobilization in pigs selected for leanness or fatness

Published online by Cambridge University Press:  02 September 2010

N. Standal ,
E. Vold ,
O. Trygstad  and
Irene Foss
N. Standal
Affiliation:
Institute of Animal Genetics and Breeding, The Agricultural University of Norway, 1432 Aas-NLH, Norway
E. Vold
Affiliation:
Institute of Animal Genetics and Breeding, The Agricultural University of Norway, 1432 Aas-NLH, Norway
O. Trygstad
Affiliation:
Institute of Pediatric Research, Rikshospitalet, Oslo, Norway
Irene Foss
Affiliation:
Institute of Pediatric Research, Rikshospitalet, Oslo, Norway
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Summary

Lipid mobilization was investigated in pigs selected for high and low backfat thickness for four generations. Both epinephrine and pituitary lipid mobilizing factors (LMF) induced in vitro lipolysis in pig fat. The release of non-esterified fatty acids (NEFA) from fat pads sampled from the group selected for thin backfat, the control group, and the group selected for thick backfat differed significantly, the means being 1·16 ± 0·18, 0·83 ± 0·06 and 0·40 ± 0·04 μmol/100 mg per 3 hr respectively.

The inhibition by pig serum from the same groups of an LMF- induced adipokinesis in rabbits also differed significantly. The mean NEFA concentrations were, in the same sequence, 5·05 ± 0·15, 3·35 ± 0·27 and 1·29 ± 0·11 milliequiv/litre respectively. A difference in feeding level of about 20% between 25 and 90 kg live weight did not influence lipid mobilization in vitro.

The serum inhibition method may be a useful aid to early selection for leanness, since it appears that the method may be used for pigs 5 to 6 weeks old.

Type
Research Article
Information
Animal Production , Volume 16 , Issue 1 , February 1973 , pp. 37 - 42
Copyright
Copyright © British Society of Animal Science 1973

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References

REFERENCES

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