Juvenile IGF-I Response in INRA RFI Selection Lines Partly Reflects Changes in Post-Weaning Attributes

Title
Juvenile IGF-I Response in INRA RFI Selection Lines Partly Reflects Changes in Post-Weaning Attributes
Publication Date
2017
Author(s)
Gilbert, H
Louveau, I
Billon, Y
Bunter, Kim L
( author )
OrcID: https://orcid.org/0000-0001-5587-4416
Email: kbunter2@une.edu.au
UNE Id une-id:kbunter2
Editor
Editor(s): Laercio Porto-Neto
Type of document
Conference Publication
Language
en
Entity Type
Publication
Publisher
Association for the Advancement of Animal Breeding and Genetics (AAABG)
Place of publication
Armidale, Australia
UNE publication id
une:23634
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
1328-3227
Start page
549
End page
552

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