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Nutrition during mid to late gestation affects growth, adipose tissue deposition, and tenderness in cross-bred beef steers
Author(s):
K.R. Underwood
,
J.F. Tong
,
P.L. Price
,
A.J. Roberts
,
E.E. Grings
,
B.W. Hess
,
W.J. Means
,
M. Du
Publication date
Created:
November 2010
Publication date
(Print):
November 2010
Journal:
Meat Science
Publisher:
Elsevier BV
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Abstract
The objective of this study was to examine whether the plane of nutrition of cows at a critical time for fetal skeletal muscle and adipose tissue development would affect meat quality and carcass composition of offspring. To alter maternal nutrition, beef cows were placed on improved pasture (IP) or native range (NR) pasture from 120 to 150 through 180 to 210days of gestation. Esophageal extrusa samples collected from cows grazing IP varied from 11.1% crude protein of organic matter early in the test period to 6.0% crude protein of organic matter at the end of the grazing period; whereas, extrusa samples of cows grazing NR ranged from 6.5% crude protein of organic matter during early grazing to 5.4% crude protein of organic matter at the end of the grazing period. Steers were slaughtered and carcass characteristics were collected. Warner-Bratzler shear force was performed on longissumus steaks, western blotting was used to measure proteolysis, and myosin isoform typing was performed. Improved pasture steers had heavier live and hot carcass weights. Tenderness was greater in IP compared to NR steers. No difference in calpastatin content and troponin-T degradation was observed between treatments. The 12th rib fat thickness was greater for IP than for NR steers. Subcutaneous adipose tissue of IP steers tended to have a greater number of cells per field of view than NR steers. Data show improving nutritional status of cows during mid to late gestation affects tenderness, adipose tissue deposition and growth in steers. Copyright © 2010 The American Meat Science Association. All rights reserved.
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Karger: Nutrition and Dietetics
Author and article information
Journal
Title:
Meat Science
Abbreviated Title:
Meat Science
Publisher:
Elsevier BV
ISSN (Print):
03091740
Publication date Created:
November 2010
Publication date (Print):
November 2010
Volume
: 86
Issue
: 3
Pages
: 588-593
Article
DOI:
10.1016/j.meatsci.2010.04.008
PubMed ID:
20659786
SO-VID:
1f76cd6b-0daa-42e6-98cd-26258e73cd06
Copyright ©
© 2010
License:
https://www.elsevier.com/tdm/userlicense/1.0/
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