| Title |
|
Juvenile IGF-I Response in INRA RFI Selection Lines Partly Reflects Changes in Post-Weaning Attributes |
|
|
| Publication Date |
|
| Author(s) |
|
| Editor |
|
Editor(s): Laercio Porto-Neto |
|
|
| Type of document |
|
| Language |
|
| Entity Type |
|
| Publisher |
|
Association for the Advancement of Animal Breeding and Genetics (AAABG) |
|
|
| Place of publication |
|
| UNE publication id |
|
| Abstract |
|
Performance data were recorded at INRA in two lines divergently selected for residual feed intake (RFI) for eight generations (G0 to G7). A subsample of piglets were bled shortly after weaning to establish concentrations of juvenile IGF-I. The line effect was clearly detected for juvenile IGF-I, confirming previous studies which found that juvenile IGF-I is an indirect early predictor of efficiency. The line difference in juvenile IGF-I was partly explained by differences between the RFI lines in their growth immediately after weaning, but remained significant after post-weaning growth was accounted for. Selection for efficiency has implications for postweaning management to limit feed deprivation and growth delays during the post-weaning period. |
|
|
| Link |
|
| Citation |
|
Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.22, p. 549-552 |
|
|
| ISSN |
|
| Start page |
|
| End page |
|