The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Matthias Gauly - One of the best experts on this subject based on the ideXlab platform.
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assessment of beef production from brahman thai native and charolais thai native crossbred bulls slaughtered at different weights i growth performance and Carcass quality
Meat Science, 2010Co-Authors: A Waritthitham, Christian Lambertz, H J Langholz, M Wicke, Matthias GaulyAbstract:Abstract Effects of genotype and slaughter weight on growth performance and Carcass quality of Brahman × Thai native (BRA) and Charolais × Thai native (CHA) crossbred bulls were studied. Thirty-four BRA and 34 CHA bulls raised under practical fattening beef farm conditions were randomly selected and slaughtered at 500, 550 and 600 kg live weight, respectively. Parameters of growth performance, Carcass quality and commercial prime cuts were determined. Results showed that growth performance and Carcass quality of CHA was better, since they showed higher weight gain, better body muscle score, higher Carcass weight high dressing percentage, higher Carcass muscle, less Carcass fat and bone plus connective tissue proportions, better Carcass classifications, greater loin eye area and higher commercial prime cut percentage. Slaughter weights up to 600 kg resulted in increased Carcass weight, loin eye area and percentage of commercial prime cuts and can therefore be recommended.
A Waritthitham - One of the best experts on this subject based on the ideXlab platform.
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assessment of beef production from brahman thai native and charolais thai native crossbred bulls slaughtered at different weights i growth performance and Carcass quality
Meat Science, 2010Co-Authors: A Waritthitham, Christian Lambertz, H J Langholz, M Wicke, Matthias GaulyAbstract:Abstract Effects of genotype and slaughter weight on growth performance and Carcass quality of Brahman × Thai native (BRA) and Charolais × Thai native (CHA) crossbred bulls were studied. Thirty-four BRA and 34 CHA bulls raised under practical fattening beef farm conditions were randomly selected and slaughtered at 500, 550 and 600 kg live weight, respectively. Parameters of growth performance, Carcass quality and commercial prime cuts were determined. Results showed that growth performance and Carcass quality of CHA was better, since they showed higher weight gain, better body muscle score, higher Carcass weight high dressing percentage, higher Carcass muscle, less Carcass fat and bone plus connective tissue proportions, better Carcass classifications, greater loin eye area and higher commercial prime cut percentage. Slaughter weights up to 600 kg resulted in increased Carcass weight, loin eye area and percentage of commercial prime cuts and can therefore be recommended.
Khémais Kraiem - One of the best experts on this subject based on the ideXlab platform.
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effect of concentrate level and slaughter body weight on growth performances Carcass traits and meat quality of barbarine lambs fed oat hay based diet
Meat Science, 2013Co-Authors: L Majdoubmathlouthi, B Said, Khémais KraiemAbstract:Abstract This study was conducted to evaluate concentrate level (CL) and slaughter body weight (SW) effects on growth performances, Carcass traits and meat quality of Barbarine lambs. Twenty-four weaned male lambs (23.1 kg), receiving an oat-hay based diet, were allotted into two groups. The LCL group received low concentrate level (300 g) and the HCL group received high concentrate level (600 g). Lambs were slaughtered at two prefixed weights (35 and 42 kg). For each group and each weight, six lambs were slaughtered. Lambs from HCL group had higher ADG, Carcass yields, Carcass compactness and subcutaneous fat thickness, and lower Carcass meat proportion. CL increase did not affect meat pH, meat and fat color, chemical and fatty acid composition. Late slaughtering improved Carcass yields and increased Carcass adiposity. However, it did not affect Carcass meat proportion and shoulder tissue composition. SW had effect on meat color and fatty acid composition.
D P Berry - One of the best experts on this subject based on the ideXlab platform.
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predicted Carcass meat yield and primal cut yields in cattle divergent in genetic merit for a terminal index
Translational Animal Science, 2019Co-Authors: Stephen M Connolly, A R Cromie, Roy D Sleator, D P BerryAbstract:Several studies have clearly demonstrated the favorable impact of genetic selection on increasing beef cattle performance within the farm gate. Few studies, however, have attempted to quantify the value of genetic selection to downstream sectors of the beef industry, such as the meat processing sector. The objective of the current study was to characterize detailed Carcass attributes of animals divergent in genetic merit for a terminal index as well as individual measures of genetic merit for Carcass weight, conformation, and fat. The data used consisted of 53,674 young bulls and steers slaughtered between the years 2010 and 2013 in multiple Irish processing plants. All animals had a genetic evaluation as well as phenotypic measures of Carcass characteristics. A terminal index, based on pedigree index for calving performance, feed intake, and Carcass traits, calculated from the Irish national genetic evaluations, was obtained for each animal. Animals were categorized into four terminal index groups based on genetic merit estimates derived prior to the expression of the Carcass phenotype by the animal. The association between genetic merit for terminal index with predicted phenotypic Carcass red meat yield, Carcass fat, Carcass bone, and Carcass composition, as well as between genetic merit for Carcass weight, conformation, and fat with predicted phenotypic Carcass red meat yield and composition were all quantified using linear mixed models. A greater terminal index value was associated with, on average, heavier phenotypic weights of each wholesale cut category. A greater terminal index value was also associated with a greater weight of meat and bone, but reduced Carcass fat. Relative to animals in the lowest 25% genetic merit group, animals in the highest 25% genetic merit group had, on average, a greater predicted yield of very high value cuts (4.52 kg), high value cuts (13.13 kg), medium value cuts (6.06 kg), low value cuts (13.25 kg) as well as more total meat yield (37 kg). The results from the present study clearly signify a benefit to meat processers from breeding programs for terminal characteristics; coupled with the previously documented benefits to the producer, the benefits of breeding programs across the entire food production chain are obvious.
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live animal measurements Carcass composition and plasma hormone and metabolite concentrations in male progeny of sires differing in genetic merit for beef production
Animal, 2009Co-Authors: A M Clarke, Michael J Drennan, R D Evans, D A Kenny, M Mcgee, D P BerryAbstract:: In genetic improvement programmes for beef cattle, the effect of selecting for a given trait or index on other economically important traits, or their predictors, must be quantified to ensure no deleterious consequential effects go unnoticed. The objective was to compare live animal measurements, Carcass composition and plasma hormone and metabolite concentrations of male progeny of sires selected on an economic index in Ireland. This beef Carcass index (BCI) is expressed in euros and based on weaning weight, feed intake, Carcass weight and Carcass conformation and fat scores. The index is used to aid in the genetic comparison of animals for the expected profitability of their progeny at slaughter. A total of 107 progeny from beef sires of high (n = 11) or low (n = 11) genetic merit for the BCI were compared in either a bull (slaughtered at 16 months of age) or steer (slaughtered at 24 months of age) production system, following purchase after weaning (8 months of age) from commercial beef herds. Data were analysed as a 2 × 2 factorial design (two levels of genetic merit by two production systems). Progeny of high BCI sires had heavier Carcasses, greater (P < 0.01) muscularity scores after weaning, greater (P < 0.05) skeletal scores and scanned muscle depth pre-slaughter, higher (P < 0.05) plasma insulin concentrations and greater (P < 0.01) animal value (obtained by multiplying Carcass weight by Carcass value, which was based on the weight of meat in each cut by its commercial value) than progeny of low BCI sires. Regression of progeny performance on sire genetic merit was also undertaken across the entire data set. In steers, the effect of BCI on Carcass meat proportion, calculated Carcass value (c/kg) and animal value was positive (P < 0.01), while a negative association was observed for scanned fat depth pre-slaughter and Carcass fat proportion (P < 0.01), but there was no effect in bulls. The effect of sire expected progeny difference (EPD) for Carcass weight followed the same trends as BCI. Muscularity scores, Carcass meat proportion and calculated Carcass value increased, whereas scanned fat depth, Carcass fat and bone proportions decreased with increasing sire EPD for conformation score. The opposite association was observed for sire EPD for fat score. Results from this study show that selection using the BCI had positive effects on live animal muscularity, Carcass meat proportion, proportions of high-value cuts and Carcass value in steer progeny, which are desirable traits in beef production.
J Philipsson - One of the best experts on this subject based on the ideXlab platform.
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genetic relationships between calving and Carcass traits for charolais and hereford cattle in sweden
Journal of Animal Science, 2004Co-Authors: S Eriksson, A Nasholm, K Johansson, J PhilipssonAbstract:: The objective of this study was to estimate genetic correlations between calving difficulty score and Carcass traits in Charolais and Hereford cattle, treating first and later parity calvings as different traits. Genetic correlations between birth weight and Carcass traits were also estimated. Field data on 59,182 Charolais and 27,051 Hereford calvings, and Carcass traits of 5,260 Charolais and 1,232 Hereford bulls, were used in bivariate linear animal model analyses. Estimated heritabilities were moderate to high (0.22 to 0.50) for direct effects on birth weight, Carcass weight, and (S)EUROP (European Community scale for Carcass classification) grades for Carcass fleshiness and fatness. Heritabilities of 0.07 to 0.18 were estimated for maternal effect on birth weight, and for direct and maternal effects on calving difficulty score at first parity. Lower heritabilities (0.01 to 0.05) were estimated for calving difficulty score at later parities. Carcass weight was positively genetically correlated (0.11 to 0.53) with both direct and maternal effects on birth weight and with direct effects on calving difficulty score. Carcass weight was, however, weakly or negatively (-0.70 to 0.07) correlated with maternal calving difficulty score. Higher Carcass fatness grade was genetically associated with lower birth weight, and in most cases, also with less difficult calving. Genetic correlations with Carcass fleshiness grade were highly variable. Moderately unfavorable correlations between Carcass fleshiness grade and maternal calving difficulty score at first parity were estimated for both Charolais (0.42) and Hereford (0.54). This study found certain antagonistic genetic relationships between calving performance and Carcass traits for both Charolais and Hereford cattle. Both direct and maternal calving performance, as well as Carcass traits, should be included in the breeding goal and selected for in beef breeds.