Relationships Between Cull Beef Cow Characteristics, Finishing Practices and Meat Quality Traits of Longissimus thoracis and Rectus abdominis (original) (raw)
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Muscle and meat quality characteristics of Holstein and Salers cull cows
Meat Science, 2007
Muscle characteristics and sensory rating of meat were determined in M. longissimus thoracis (LT), M. semimembranosus (SM), M. semitendinosus (ST) and M. triceps brachii (TB) from seven Holstein (HO, dairy breed) and six Salers (SA, beef breed) cull cows slaughtered at 6-7 years of age at the same fat score. Significant differences (P < 0.001) among muscle types were observed: ST was the more glycolytic and TB the more oxidative; total collagen: ST > SM = TB > LT; initial and overall tenderness: LT > TB = SM > ST, juiciness: TB > LT = SM > ST. Flavour differed only between breeds: HO > SA (P < 0.01). Three tenderness classes (high, intermediate, low) were determined from scores for sensory overall tenderness for all 52 meats: the lower total and insoluble collagen contents, the more oxidative metabolism, the more tender was the meat. Muscle type, and not breed explained most of the variability of meat quality from dairy and beef cull cows slaughtered at the same age and fat score.
Journal of Muscle Foods, 2009
From an experiment in which 60 beef cull cows were assigned to one of three feeding treatments, forage fed, high concentrate or high concentrate plus ractopamine, 10 muscles were removed from both sides of the carcass. Muscles from one side of the carcass were enhanced with a solution to target 0.3% salt and 0.3% phosphate in the final product. Minimal to no differences were observed in color, pH, sensory characteristics or shear force as a result of dietary treatment. Enhancement resulted in muscles with higher (P Յ 0.05) pH and darker color. Sensory scores for juiciness and tenderness were improved (P Յ 0.05) with enhancement. The Adductor was the only muscle not exhibiting lower shear values due to enhancement (P > 0.05). To add further value to meat from cull cows, enhancement could be utilized, independent of feeding regimen prior to slaughter.
Chemical, technological and sensory properties of meat from different cattle genotypes
Biotehnologija u stocarstvu, 2011
Possibilities for improvement of the quality of beef in population of Domestic spotted cattle breed (D) by application of industrial crossing with French fattening breeds Charolais (DxS) and Limousine (DxL) were investigated. Comparative research included 25 heads of young cattle of DxS, 18 crosses of DxL and 21 crosses of D genotype. Results of the analysis of chemical composition of longissimus muscle in young cattle show significant statistical differences (P<0.05) in percentage of intramuscular fat, the highest value was determined in cattle of group DxS (2.37%), and in total pigments which was the highest in cattle of group D (101.12 ppm). Young cattle in group D had the lowest value of the meat shear force after heat treatment (5.43 kg/cm2), i.e. they had the tenderest meat. Data obtained in the sensory analysis of cooked meat were very high and showed no significant differences between groups. Statistically significant difference (P<0.05) was established only in assessm...
Meat Science, 2004
Seventy-four young bulls of the Bruna dels Pirineus beef cattle breed were reared in a typical production system and slaughtered at an average age of 381 days and live weight of 541 kg. The animals were evaluated for productive traits, carcass quality, meat quality, eating quality and biochemical characteristics of m. longissimus thoracis (LT). Biochemical measurements included intramuscular fat (IMF) and collagen proportion, haem pigment concentration, lactate dehydrogenase and isocitrate dehydrogenase activities and type I (MHC I) fibre percentage determined by ELISA. Bruna dels Pirineus bulls achieved high growth rates during the fattening period (1.63 kg/day) and showed good carcass quality, with a high dressing-out proportion (607 g/kg, hot carcass), a good conformation score (U; EUROP) and a moderate fatness score (3;1-5). Carcass composition was estimated from the sixth rib joint dissection (682 g/kg lean proportion, 127 g/kg total dissectable fat and 163 g/kg bone). IMF (24.3 g/kg) and MHC I (27.9%) showed high variabilities (CV> 30%). Sensory analysis of LT included beef and livery odour and flavour intensity, and overall tenderness and juiciness assessment of loin samples (14-day ageing). Beef odour and flavour were slightly positively correlated with IMF and carcass fatness score (P< 0.05). Fatness, MHC I, insoluble collagen and cooking losses tended to affect the livery flavour intensity positively. This variable was significantly higher in meat from bulls of lower carcass quality (i.e. lower conformation score, lower lean proportion; P< 0.05) and higher type I fibre percentage. Loin overall tenderness and juiciness were not affected by the biochemical traits studied, however, they were negatively affected by cooking loss (P< 0.05).
Carcass Characteristics, Meat Quality and Eating Quality of Culled Dairy Cows
2019
This study investigated the effect of breed and marbling score on carcass characteristics, meat quality and sensory evaluation of culled dairy cows (HFF), fattening dairy steers (HFM) and crossbred Charolais steers (CHA) with different marbling score (MBS<3 and MBS≥3). Results showed that the CHA group had greater carcass weight and dressing (%) than the HFM and HFF groups. Rib-eyes area of the HFF group was smaller than the others (p<0.05). HFF beef with MBS<3 had higher fat content than the others (p<0.05) while beef with MBS≥3 of all breeds did not differ in fat content (p>0.05). At MBS<3, CHA beef had higher L*and b* values than the others (p<0.05), but there was no difference in L* and b* values when MBS≥3. At MBS<3, CHA and HFM groups had higher WBSF than HFF group (p<0.05) but at MBS≥3, there was no difference in WBSF among breeds. CHA and HFF beef had notable oleic acid content and MUFA contents (p<0.05), while HFM and HFF beef had greater P/S r...
Anais da Academia Brasileira de Ciências, 2015
The aim of this study was to evaluate, by meta-analysis, the quality of the meat of the cows according to genotype, termination system and age class slaughter. During an online research were identified 15 articles with information related to meat quality of slaughtered cows. The data were grouped according of the genotype of cows being: zebu or continental defined, crossed zebu x british or zebu x continental; according to termination system: feedlot or grassland; according to age of slaughter, where: up to 4 years old (young), 4-8 years old (adult) or more than 8 years old (old). The meat of the continental crossbred cows was softer than the other genotypes, both panel of evaluators and by Shear. The meat of cows finished in feedlot showed higher marbling degree in relation to meat of females finished on grassland. The reduction of the slaughter age of cows improved the meat color. The cow's genotype affects the organoleptic aspects of meat while the finished system and slaught...
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The objective of this study was to determine whether sire breed and/or castration had an effect on meat quality of M. longissimus thoracis et lumborum (LTL) muscle from crossbred bulls and steers and to investigate the relationship amongst the traits examined. Warner–Bratzler shear force (WBSF), intramuscular fat (IMF)%, cook-loss%, drip-loss%, colour (L*, a*, b*) and ultimate pH (upH) were determined in the LTL muscle from eight beef sire breeds representative of the Irish herd (Aberdeen Angus, Belgian Blue, Charolais, Hereford, Limousin, Parthenaise, Salers and Simmental). The results indicate that IMF%, cook-loss% and drip-loss% were associated with breed (p < 0.05); while WBSF, IMF% and cook-loss% differ between genders (p < 0.05). Steer LTL had a greater IMF% and exhibited reduced WBSF and cook-loss% in comparison to the bull LTL (p < 0.05). This study provides greater insight into how quality traits in beef are influenced by breed and gender and will support the indus...
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Meat quality traits and muscle composition of cows differing in lactation performance, 2012
Beef and dairy cows differ in the way in which they utilise nutrients and in accretion or mobilisation of body reserves during lactation. Thus far, little is known about the impact of lactation performance on body composition, meat quality, and the related muscle structure of cows with a defined, combined beef and dairy genetic background. In the described experiment, 50 F2 cows, originating from mating Charolais bulls to German Holstein cows and a following intercross of F1 individuals, were slaughtered during the second lactation, 30 days after calving. Cows were assigned to 3 groups, each containing representatives of 3 families, according to lactation performance. Standard carcass and meat quality traits were determined. Additionally, samples from longissimus muscle were investigated by histology and computer image analysis for muscle fibre profile, intramuscular fat cell size, and marbling traits. Subcutaneous fat cell size was measured to estimate the impact of lactation on body fat reserves. The results suggest no influence of the duration of the first lactation on body composition, meat quality or muscle structure. However, the amount of milk per day influenced body weight, body composition, and marbling traits. Relationships between traits were low, but showed consistently that increasing milk yield was negatively correlated with tissue accretion. Changes of muscle fibre and fat cell profile, indicating protein or fat mobilisation by lactation, could not be detected. In the presented study, lactation had only minor consequences for meat quality.
Carcass and meat quality in double-muscled Belgian Blue bulls and cows
Meat Science, 2003
Carcass and meat quality of 37 bulls and 91 cows of the Belgian Blue breed (double-muscled type) were compared. Age at slaughter averaged 648 AE 73 and 1820AE689 days, respectively. Both groups of cattle were finished on maize silage supplemented with concentrate, and were slaughtered at about 750 kg live weight. Females had a lower (P=0.004) cold carcass weight (469.7 kg) in comparison with bulls (500.8 kg), due to a reduced dressing percentage (63.8 vs. 66.6; P <0.001). SEUROP conformation was better for bulls. SEUROP fat covering (P=0.007) and fat content in the carcass (16.4 vs. 12.9%; P < 0.001) and in the M. longissimus thoracis (LT) muscle (2.3 vs. 1.1%; P < 0.001) were higher for females than for males. The LT of cows was darker (lower L* and higher a*-value; P < 0.001), had a better waterholding capacity (P40.063) and was slightly more tender (P=0.120) than the LT of bulls. Increasing parity reduced dressing percentage and increased LT lightness (L*-value) in cows. Several carcass (SEUROP-grading, composition, LT-area) and meat quality traits (protein and fat contents, drip and cooking losses, a*-value) were better correlated with carcass weight than parity.
Texture of Piemontese Beef Culled Cows Aged 4-13 Years
This study examine the effect of age of the animals and ageing time (d1, d9, d15) on meat texture of ten double-muscled Piemontese culled cows, slaughtered under "young" and over "mature" 5 years of age. The analyses carried out on longissimus thoracis et lumborum (LTL) muscle were: pH (at 30 hrs p.m.), sarcomere length, cooking losses (CL), Warner-Bratzler shear force (WB), compression test (CT). The considered parameters for WB were: peak force (PF), initial yield (IY) and their difference (PF–IY). The compression test was performed at 20% (H20%) and 80% (H80%) of original height of the sample. Compared with young cows, mature cows, had a higher PF–IY value. The lower IY and the higher difference PF-IY at d9 and d15 in comparison with d1 certify the tenderizing effect of ageing on myofibrillar tissue. Similarly, a lower H20% was detected at d9 and d15, which reflects the tenderizing effect of the proteases on the myofibers. These results indicate that the tende...