Please use this identifier to cite or link to this item:
Title: Insulin-like Growth Factor-I Measured (IGF-I) in Juvenile Pigs is Genetically Correlated with Economically Important Performance Traits
Contributor(s): Bunter, Kim Louise (author); Hermesch, Susanne (author)orcid ; Luxford, BG (author); Graser, Hans Ulrich (author); Crump, Ronald Edward (author)
Publication Date: 2005
Handle Link:
Abstract: Insulin-like growth factor-I (IGF-I) is a naturally occurring polypeptide produced in the liver, muscle and fat tissues. It is known to be associated with growth and development during the post-natal growth period. Evidence for strong genetic correlations between juvenile IGF-I and performance traits would suggest this physiological measure would be useful as an early selection criterion. This paper reports estimates of genetic parameters from 9 trials where IGF-I was measured in juvenile pigs. All trials involved populations undergoing active selection for improved performance (e.g. efficient lean meat growth). Juvenile IGF-I was moderately heritable (average h2: 0.31) and influenced by common litter effects (average c2: 0.15). Genetic correlations (rg) between juvenile IGF-I and backfat (BF), feed intake (FI) or feed conversion ratio (FCR) traits were generally large and positive: rg averaged 0.57, 0.41 and 0.65, respectively. Phenotypic correlations (rp) between juvenile IGF-I and BF, FI or FCR were much lower (rp averaged 0.21, 0.09, and 0.15, respectively) as residual correlations between IGF-I and these performance traits were low, consistent with being measured at very different times. Correlations (genetic or phenotypic) between juvenile IGF-I and growth traits (e.g. lifetime daily gain or test daily gain) were relatively low, with average values within ± 0.09 of zero. Results from the trials reported here, and several physiological studies, indicate that information on juvenile IGF-I concentration can be used as an early physiological indicator of performance traits traditionally measured later in life. There is a clear role for juvenile IGF-I to facilitate pre-selection and more accurate selection of livestock for hard to measure traits, such as FCR, in pig breeding programmes.
Publication Type: Conference Publication
Conference Name: 16th Conference of the Association for the Advancement of Animal Breeding and Genetics, Noosa Lakes, Australia, 25th - 28th September, 2005
Source of Publication: Application of new genetic technologies to animal breeding: Proceedings of the 16th Conference of the Association for the Advancement of Animal Breeding and Genetics, p. 90-90
Publisher: CSIRO Publishing
Place of Publication: Collingwood, Australia
ISSN: 1328-3227
Field of Research (FOR): 070201 Animal Breeding
HERDC Category Description: E3 Extract of Scholarly Conference Publication
Other Links:
Statistics to Oct 2018: Visitors: 240
Views: 252
Downloads: 0
Appears in Collections:Conference Publication

Files in This Item:
2 files
File Description SizeFormat 
Show full item record

Page view(s)

checked on Feb 8, 2019
Google Media

Google ScholarTM






Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.