The effects of composition of gain during a winter store period on carcass composition determined by Velocity of Sound Scanning (VOS) at spring and autumn in beef steers

2000 ◽  
Vol 2000 ◽  
pp. 77-77
Author(s):  
N.S. Prathalingam ◽  
L. Heasman ◽  
J. Struthers ◽  
J. Parker ◽  
D.G. Chapple ◽  
...  
Keyword(s):  
Body Composition ◽  
Compensatory Growth ◽  
Carcass Composition ◽  
Feed Restriction ◽  
Beef Steers ◽  
Feeding Period ◽  
Velocity Of Sound

Restriction of feed during the winter store period is an important part of current beef systems to exploit compensatory growth from cheap grazed grass. Previous studies have demonstrated that the composition of finished carcasses can be altered by the type of diet fed during the winter feed restriction period (Baker et al, 1985). The aim of this study is to examine the effects of body composition at the end of the winter store period on the composition of gain during the subsequent grass feeding period

Growth performance and carcass composition in beef heifers undergoing catch-up (compensatory) growth

1991 ◽  
Vol 71 (4) ◽  
pp. 1021-1029 ◽  
Author(s):  
E. Yambayamba ◽  
M. A. Price
Keyword(s):  
Compensatory Growth ◽  
Live Weight ◽  
Carcass Composition ◽  
Feed Restriction ◽  
Beef Heifers ◽  
Slaughter Weight ◽  
Permanent Effect ◽  
Catch Up ◽  
Ad Libitum ◽  
Ad Libitum Feeding

Fifty-three Hereford crossbred heifers (211 ± 28 (mean ± SD) kg; 197 ± 13 d of age at day 1) were used to study catch-up growth and its effects on carcass composition. Five heifers were slaughtered on day 1; the remaining 48 were randomly penned in groups of six and assigned to treatments as follows: three pens to ad libitum feeding (target gain > 1.0 kg d−1); three pens to 2 mo of feed restriction (target gain 0.5 kg d−1); followed by realimentation; and two pens to 4 mo of feed restriction (target gain: 2 mo at 0.5 kg d−1 and 2 mo at 0.0 kg d−1) followed by realimentation. Animals from one pen were slaughtered from each treatment after 2 mo, after 4 mo, and at a final slaughter weight of about 410 kg. During the final period (4 mo to slaughter), growth rate was greater (P < 0.05) in the 4-mo than in the 2-mo restricted–realimented animals or the ad-libitum-fed animals (1.91 vs. 1.18 vs. 1.02 kg d−1), respectively. Feed restriction for 2 mo had no significant effect on the composition of the three-rib cut, but 4 mo of feed restriction was associated with significantly lower and higher (P < 0.05) proportions of fat and bone, respectively, in the three-rib cut. Muscle proportion was not affected by treatment. At the final slaughter weight, no significant differences were found among treatments in the tissue proportions of the three-rib cut. It is concluded that 2 or 4 mo of feed restriction, starting at 6 mo of age, has no permanent effect on a heifer's live weight or body composition. Key words: Heifers, feed restriction, realimentation, compensatory growth, carcass composition

Effects of compensatory growth on protein metabolism and meat tenderness of beef steers

1991 ◽  
Vol 71 (3) ◽  
pp. 659-668 ◽  
Author(s):  
H. L. Bruce ◽  
D. N. Mowat ◽  
R. O. Ball
Keyword(s):  
Body Composition ◽  
Shear Force ◽  
Compensatory Growth ◽  
Protein Solubility ◽  
Corn Silage ◽  
Beef Steers ◽  
Dietary Energy ◽  
Meat Tenderness ◽  
Grass Silage ◽  
Corn Gluten

The relationships between meat tenderness and the changes in metabolism and body composition associated with compensatory growth in cattle were examined. Thirty-six steers were randomly allotted to 12 pens of three with three diets assigned randomly to the pens. Diets were alfalfa/grass silage, alfalfa/grass silage supplemented with corn gluten and bloodmeal and corn silage supplemented with soybean meal. Six steers from each treatment were slaughtered on each of days 124 and 175 of the trial to assess carcass characteristics. Following 124 d on trial, the remaining steers received a high-grain finishing diet. Blood and urine samples were collected throughout the trial for analyses of 3-methylhistidine, hydroxyproline and creatinine. At each slaughter, non-carcass components were cleaned and weighed. Lean, fat and bone proportions were estimated with a 9th-10th-11th rib dissection. Following dissection, the longissimus muscles were frozen at −10 °C for analysis of shear force, collagen and protein solubility. The steers fed the alfalfa/grass silage experienced compensatory growth within the first 14 d of the finishing phase. Steers fed the alfalfa/grass silage had lower gain throughout the growing phase (0–124 d), and empty body weight was less than that of the steers fed corn silage. Compensatory growth was observed in steers fed corn silage during the first 14 d of the finishing diet, as evidenced by higher gains compared with steers fed the other diets. Differences in body composition among treatments at 124 d and 175 d were related to dietary energy and not compensatory growth. Meat tenderness, measured by shear force, appeared to be affected primarily by dietary energy and intramuscular fat rather than by rate of growth. Key words: Compensatory growth, steers, meat tenderness, beef

scholarly journals Metabolic and histochemical characteristics of fat and muscle tissues in homozygous or heterozygous pigs for the body composition QTL located on chromosome 7

2007 ◽  
Vol 30 (3) ◽  
pp. 232-241 ◽  
Author(s):  
Julie Demars ◽  
Juliette Riquet ◽  
Marie-Pierre Sanchez ◽  
Yvon Billon ◽  
Jean-François Hocquette ◽  
...  
Keyword(s):  
Body Composition ◽  
Carcass Composition ◽  
The Body ◽  
Chromosome 7 ◽  
Isolated Cells ◽  
Large White ◽  
Muscle Tissues ◽  
Metabolism Enzymes ◽  
Tissue Characteristics ◽  
Qtl Effects

Quantitative trait loci (QTL) influencing many traits including backfat thickness and carcass composition have been detected on porcine chromosome 7 (SSC7) in an F2 cross between Large White (LW) and Meishan (MS) pigs. However, the genes and controlled pathways underlying the QTL effects on body phenotype remain unknown. This study aimed at investigating the tissue characteristics at metabolic and cellular levels in pigs that were either homozygous or heterozygous for a body composition SSC7 QTL. A backcross pig (BC3) was first progeny tested to confirm its heterozygoty for the SSC7 QTL; results on all offspring ( n = 80) confirmed the QTL effects on body fatness. This boar was then mated with three sows known to be heterozygous for this QTL. In the subset of pigs per genotype, we found that heterozygous LWQTL7/MSQTL7 pigs had smaller adipocytes in backfat, together with a lower basal rate of glucose incorporation into lipids and lower activities of selected lipogenic enzymes in backfat isolated cells, compared with homozygous LWQTL7/LWQTL7 pigs. A higher number of adipocytes was also estimated in backfat of LWQTL7/MSQTL7 animals compared with LWQTL7/LWQTL7 pigs. The SSC7 QTL did not influence oxidative and glycolytic metabolisms of longissimus and trapezius muscles, as estimated by the activities of specific energy metabolism enzymes, or the myofiber type properties. Altogether, this study provides new evidence for an altered adipocyte cellularity in backfat of pigs carrying at least one MS allele for the SSC7 QTL. Some candidate genes known for their functions on adipocyte growth and differentiation are suggested.

Compensatory growth and carcass quality in growth-restricted and refed beef steers.

1995 ◽  
Vol 73 (10) ◽  
pp. 2971 ◽  
Author(s):  
R D Sainz ◽  
F De la Torre ◽  
J W Oltjen
Keyword(s):  
Compensatory Growth ◽  
Carcass Quality ◽  
Beef Steers
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