Response of broilers selected on carcass quality to dietary protein supply: live performance, muscle development, and circulating insulin-like growth factors (IGF-I and -II)

Tesseraud, S., Pym, R. A., Le Bihan-Duval, E. and Duclos, M. J. (2003) Response of broilers selected on carcass quality to dietary protein supply: live performance, muscle development, and circulating insulin-like growth factors (IGF-I and -II). Poultry Science, 82 6: 1011-1016.


Author Tesseraud, S.
Pym, R. A.
Le Bihan-Duval, E.
Duclos, M. J.
Title Response of broilers selected on carcass quality to dietary protein supply: live performance, muscle development, and circulating insulin-like growth factors (IGF-I and -II)
Journal name Poultry Science   Check publisher's open access policy
ISSN 1525-3171
0032-5791
Publication date 2003-06-01
Sub-type Article (original research)
Open Access Status Not Open Access
Volume 82
Issue 6
Start page 1011
End page 1016
Total pages 6
Place of publication Chicago, Ill. U.S.A
Publisher Poultry Science Association
Language eng
Subject 0707 Veterinary Sciences
0799 Other Agricultural and Veterinary Sciences
Abstract The effect of dietary protein supply on muscle development and circulating concentrations of insulin-like growth factors (IGF)-I and -II was examined in chickens selected for increased breast yield and decreased fatness (quality, QL) and in its control line (CL). CL and QL chickens were fed isoenergetic diets containing 121.5 or 215.8 g CP/kg during a 12-d period; comparisons were performed at 33 d of age. Birds given the high protein diet grew faster, ate less feed, had lower feed conversion ratio (FCR), and higher muscle weights than their counterparts given the low protein diet. The muscle weight response to protein supply differed between muscles in both lines, with pectoralis major appearing more sensitive than sartorius. The response of the gastrocnemius muscle depended on the line. Selection for carcass quality increased (P < 0.01) body weight, growth rate, feed intake, pectoralis major and sartorius muscle weights, and pectoralis major muscle proportion. There was, however, no line difference in FCR or in sartorius muscle proportion. The weight and proportion of the gastrocnemius muscle were higher (P < 0.05) in the QL than the CL chickens on the high protein diet, but there was no line difference for the low protein diet. Plasma levels of IGF-I, and to a lesser extent IGF-II, were lower (P < 0.01) in protein-restricted chickens. No difference in circulating IGF-II was observed between the lines. Concentrations of IGF-I were higher (P < 0.05) in QL than CL chickens, which may contribute to improved body composition for this genotype.
Keyword Dietary protein
Growth
IGF-I and -II
Skeletal muscle
Strain difference
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 25 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 0 times in Scopus Article
Google Scholar Search Google Scholar
Created: Mon, 27 Feb 2006, 21:46:22 EST