Genetic analyses of live-animal ultrasound and abattoir carcass traits in Australian Angus and Hereford cattle.

2000 ◽  
Vol 78 (7) ◽  
pp. 1786 ◽  
Author(s):  
A Reverter ◽  
D J Johnston ◽  
H U Graser ◽  
M L Wolcott ◽  
W H Upton
Keyword(s):  
Carcass Traits ◽  
Live Animal ◽  
Genetic Analyses ◽  
Hereford Cattle

scholarly journals Alternative Models in Genetic Analyses of Carcass Traits Measured by Ultrasonography in Guzerá cattle: A Bayesian Approach

2013 ◽  
Vol 5 (9) ◽  
Author(s):  
Jairo Azevedo Junior ◽  
José C. Souza ◽  
Robert A. Cushman ◽  
Marco C. A. M. Bink ◽  
Caio Augusto Perazza ◽  
...  
Keyword(s):  
Bayesian Approach ◽  
Carcass Traits ◽  
Genetic Analyses ◽  
Alternative Models

Prediction of slaughter cow composition using live animal and carcass traits.

1998 ◽  
Vol 76 (6) ◽  
pp. 1594 ◽  
Author(s):  
F M O'Mara ◽  
S E Williams ◽  
J D Tatum ◽  
G G Hilton ◽  
T D Pringle ◽  
...  
Keyword(s):  
Carcass Traits ◽  
Live Animal

Use of real-time ultrasound to evaluate live animal carcass traits in young performance-tested beef bulls.

1997 ◽  
Vol 75 (9) ◽  
pp. 2300 ◽  
Author(s):  
R D Bergen ◽  
J J McKinnon ◽  
D A Christensen ◽  
N Kohle ◽  
A Belanger
Keyword(s):  
Real Time ◽  
Carcass Traits ◽  
Live Animal ◽  
Beef Bulls

Genetic parameters for carcass traits and their live animal indicators in Simmental cattle1

2003 ◽  
Vol 81 (6) ◽  
pp. 1427-1433 ◽  
Author(s):  
D. H. Crews ◽  
E. J. Pollak ◽  
R. L. Weaber ◽  
R. L. Quaas ◽  
R. J. Lipsey
Keyword(s):  
Genetic Parameters ◽  
Carcass Traits ◽  
Live Animal

Estimation of genetic parameters in a Suffolk sheep group breeding scheme

1996 ◽  
Vol 1996 ◽  
pp. 113-113 ◽  
Author(s):  
M. Araghi ◽  
M.K. Curran ◽  
G.E. Pollott
Keyword(s):  
Genetic Parameters ◽  
Carcass Traits ◽  
Genotypic Correlation ◽  
The South ◽  
Breeding Scheme ◽  
Live Animal ◽  
Group Breeding ◽  
Initial Nucleus ◽  
Estimation Of Genetic Parameters ◽  
Wye College

In 1989, ten Suffolk breeders co-operated to establish a nucleus flock at Wye College. The group is known as the Wye Suffolk Improvement Group (WSIG). The members each contributed 5-10 pedigree ewes to use as the initial nucleus flock. Eighty-nine ewes were delivered to the College by the various participants. The objective of this study was to obtain estimates of the heritabilities of live animal traits, used to improve carcass traits, and phenotypic and genotypic correlation estimates between them in the Suffolk lambs in the south of England.

Ultrasonography as a predicting tool for carcass traits of young Nellore crossbred bulls in a feedlot system

2003 ◽  
Vol 2003 ◽  
pp. 142-142
Author(s):  
L. Suguisawa* ◽  
H. N. Oliveira ◽  
W. R. S. Mattos ◽  
A. A. Souza ◽  
M. D. B. Arrigoni ◽  
...  
Keyword(s):  
Real Time ◽  
Carcass Traits ◽  
Subcutaneous Fat ◽  
Longissimus Dorsi ◽  
Live Animal ◽  
Ribeye Area ◽  
Ultrasound Technology ◽  
Subcutaneous Fat Thickness ◽  
Fat Thickness ◽  
Real Time Ultrasonography

Ultrasound technology provides a oportunity to quickly and economically estimate carcass atributes on the live animal (Brethour, 2000). In general, this technology has been used to detect variation for fat depth and ribeye area (longissimus dorsi muscle) in performance tested yearling bulls at several countries. In the present study, real time ultrasonography was used to predict the ribeye area (RA) and the subcutaneous fat thickness (FT) in Nellore crossbred.

Estimation of genetic parameters in a Suffolk sheep group breeding scheme

1996 ◽  
Vol 1996 ◽  
pp. 113-113
Author(s):  
M. Araghi ◽  
M.K. Curran ◽  
G.E. Pollott
Keyword(s):  
Genetic Parameters ◽  
Carcass Traits ◽  
Genotypic Correlation ◽  
The South ◽  
Breeding Scheme ◽  
Live Animal ◽  
Group Breeding ◽  
Initial Nucleus ◽  
Estimation Of Genetic Parameters ◽  
Wye College

In 1989, ten Suffolk breeders co-operated to establish a nucleus flock at Wye College. The group is known as the Wye Suffolk Improvement Group (WSIG). The members each contributed 5-10 pedigree ewes to use as the initial nucleus flock. Eighty-nine ewes were delivered to the College by the various participants. The objective of this study was to obtain estimates of the heritabilities of live animal traits, used to improve carcass traits, and phenotypic and genotypic correlation estimates between them in the Suffolk lambs in the south of England.

Estimates of the complete genetic covariance matrix for traits in multi-trait genetic evaluation of Australian Hereford cattle

2004 ◽  
Vol 55 (2) ◽  
pp. 195 ◽  
Author(s):  
Karin Meyer ◽  
David J. Johnston ◽  
Hans-Ulrich Graser
Keyword(s):  
Genetic Parameters ◽  
Carcass Traits ◽  
Early Growth ◽  
Genetic Evaluation ◽  
Covariance Matrices ◽  
Ultrasound Scanning ◽  
Genetic Covariance ◽  
Individual Traits ◽  
Hereford Cattle ◽  
Covariance Components

Estimates of covariance components among all 22 traits considered in the current multi-trait genetic evaluation of Australian Hereford cattle were obtained. Traits included 5 weight traits, 8 traits measured through live ultrasound scanning, 3 traits related to reproductive performance, and 6 carcass traits. Estimates were obtained by restricted maximum likelihood, carrying out a series of bivariate analyses. Data for each analysis were selected attempting to maximise the number of animals or animal–parent pairs that had both traits recorded. Estimates were pooled using a weighted 'iterative summing of expanded part matrices' procedure, which ensured positive semi-definite covariance matrices. Models of analyses for individual traits closely resembled those used in genetic evaluation. Results generally agreed with literature results, although estimates of genetic parameters for carcass traits that had few records available tended to fluctuate. Except for 'days to calving', heritability estimates were moderate to high for all traits. Genetic parameters for early growth were different to those for other breeds, with maternal effects for weaning weight being considerably more important and the heritability somewhat lower.

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