Relationship of porcine plasma free insulin-like growth factor 1 (IGF-1) with the growth performance and scrotal length of landrace boars

Issue Date

2011

Abstract

Insulin-like Growth Factor I (IGF-I) is a 7.6 kDa, 70 amino acid residue peptide hormone that has been shown to be involved in the metabolic regulation of growth and reproduction in livestock. The present study was undertaken to quantify the concentrations of plasma free IGF-I in growing Landrace boars and determine whether the plasma free IGF-I concentration can be used as a selection criterion for growth. A total of fourteen (n = 14) Landrace boars were bled, weighed and monitored for ADG, backfat thickness and scrotal length at 15 and 24 weeks of age. Plasma samples were extracted from the blood and plasma free IGF-I concentrations were measured using the DSL 10-9400 Active free IGF-I Enzyme-Linked Immunosorbent (ELISA) kit. Experimental Landrace boars data on live weight, ADG, backfat thickness and scrotal length were correlated with their levels of plasma free IGF-I. This study has demonstrated a significant decrease (P = 0.0001) in the circulating plasma free IGF-I concentration of Landrace boars from 15 to 24 weeks of age. Furthermore, correlation of plasma free IGF-I concentration with growth traits showed a positive association with ADG (r = 0.726), while negative associations were established with backfat thickness (r = -0.412), scrotal length (r= -0.700) and live weight (r= -0.579). Results of this study suggest that circulating plasma free IGF-I is related to leaner body composition in swine. © 2011 Friends Science Publishers.

Source or Periodical Title

International Journal of Agriculture and Biology

ISSN

1560-8530

Volume

13

Issue

1

Page

51-56

Document Type

Article

Physical Description

tables

Language

English

Subject

Growth factor, Growth performance, IGF-I, Landrace boars

Digital Copy

yes

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