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Serum leptin concentration in pigs selected for high or low daily food intake

Published online by Cambridge University Press:  01 April 2000

NEIL D. CAMERON ,
JOHN C. PENMAN  and
ELAINE McCULLOUGH
NEIL D. CAMERON
Affiliation:
Roslin Institute, Roslin, Midlothian EH25 9PS, Scotland, UK
JOHN C. PENMAN
Affiliation:
Roslin Institute, Roslin, Midlothian EH25 9PS, Scotland, UK
ELAINE McCULLOUGH
Affiliation:
Roslin Institute, Roslin, Midlothian EH25 9PS, Scotland, UK
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Abstract

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Selection for high or low daily food intake (DFI) in Large White pigs resulted in higher serum leptin concentration, fat deposition and food intake in the high DFI line. The response in serum leptin concentration indicated that the higher fat deposition of the high DFI line was not due to insufficient leptin production, as in the Lepob/Lepob mouse. Serum leptin was more highly correlated with fat deposition than with food intake indicating that the response in serum leptin was primarily due to increased fat deposition rather than to higher energy intake per se. The low correlations between serum leptin measured at 30 kg and performance test traits indicate that serum leptin would not be efficient for selection of animals prior to performance test. However, the consistent positive correlations between serum leptin and a measure of fat deposition suggest that serum leptin could usefully be incorporated in selection criteria for genetic improvement of carcass lean content in pigs.

Type
Research Article
Information
Genetics Research , Volume 75 , Issue 2 , April 2000 , pp. 209 - 213
Copyright
© 2000 Cambridge University Press