Fattening on pasture of beef calves differing in muscle thickness, frame size and apparent Brahman genotype subjected to implant and supplementation regimes

Growth data of two separate groups of 52 (group I) and 85 (group II) grazing cattle were analyzed using least squares analyses of variance-covariance for average daily gain (ADG), body weight:height ratio (WHR) and final live weight (FLW) as affected by muscle thickness (thick, intermediate, or thin), frame size (large, medium, or small) and apparent Brahman genotype (50, 75 or 100% Brahman), supplementation on pasture (supplemented vs control groups) and/or implant regime in group II (1XRevalor®-2XRalgro® vs 2X Ralgro®-2X Ralgro®) and their respective interactions. Muscle thickness did not affect growth traits (P>.05). In group I medium-sized calves advantaged 16.2 kg in FLW to their smallsized counterparts. Supplementation treatment affected favorably ADG, WHR and FLW whereas the apparent Brahman genotype did not show significant effect on growth performance. The muscle thickness x supplementation interaction showed that within the supplemented group, calves with intermediate musculature had higher (0.17 kg/cm more)WHR than those with thin musculature (P<.05). In group II, the large-framed cattle had higher height (>3.5 cm) and heavier FLW (>25.4 kg) than medium- and small-framed cattle; the supplemented cattle had superior (P<.01) stature and the 100% Brahman with 3.6 cm were lighter in FLW (464 kg). Implant regime had no effect on growth traits (P>.05). The frame size x supplementation interaction affected (P>.05) FLW and WHR (within the supplemented group large-framed >mediumframed>small-framed cattle). Frame size allowed for anticipating the future growth performance of grazing calves and the biological response could be improved by the supplementation treatment

Avaliação do impacto dos cruzamentos Bos taurus x Bos indicus e tecnologias post mortem na qualidade gustativa de lombos de novilhos terminados a pasto

This experiment aimed to evaluate the effects of Brahman crossbreeding and postmortem technologies (electrical stimulation and vacuum aging) on eating quality of loins from pasture-finished bulls. Fifty yearling bulls representing five Brahman-influenced types (n = 10 each): Brahman (BRAH), F1-Angus (F1ANG), F1-Chianina (F1CHI), F1-Romosinuano (F1ROM), and F1-Simmental (F1SIM) were supplemented on pasture until reaching a desirable conformation at a suitable live weight of ca. 480 kg. All carcasses were classified as “Bullocks” according to U.S. standards. Carcass’s right sides were subjected to high-voltage electrical stimulation (ES) while the left sides were not stimulated (NOES). Longissimus lumborum (LL) steaks from ES and NOES carcasses were allotted either to the vacuum aging control treatment for 2 d (NOAGING) or 10 d (AGING).  LL steaks were evaluated for Warner-Bratzler shear force (WBSF) and sensory traits by trained panelists. No differences in WBSF, juiciness, or flavor ratings were detected among breed types (P > 0.05). Sensory ratings for tenderness-related traits varied little with breed type (P < 0.05). Steaks from F1ANG received higher ratings for muscle fiber tenderness, overall tenderness, and amount of connective tissue, and differed (P < 0.05) from those of F1ROM and F1SIM which received the lowest ratings. Bullock loins were more responsive to ES+AGING in WBSF reduction and desirable tenderness ratings than other postmortem treatments (P < 0.05) by reaching a greater proportion (72%) of “tender” (WBSF < 40.1 N) steaks than AGING (48%), ES (36%), and NOES-NOAGING (24%) samples (P < 0.01). Tenderness of bullock loin steaks is marginally improved by crossbreeding; therefore, the application of ES+AGING is necessary to ensure a higher proportion of tenderloin steaks.Se evaluaron los efectos de cruzamientos interraciales y tecnologías postmortem sobre la calidad gustativa de lomos de toros terminados a pasto.  Cincuenta toros añosos representando cinco tipos raciales (n = 10 cada uno): Brahman puro (BRAH), F1-Angus (F1ANG), F1-Chianina (F1CHI), F1-Romosinuano (F1ROM) y F1-Simmental (F1SIM) se suplementaron a pastoreo hasta alcanzar una conformación satisfactoria a un peso vivo de ca. 480 kg. Todas las canales clasificaron como “Bullocks” (Toretes) por la norma estadounidense. Los lados derechos de cada canal se sometieron a estimulación eléctrica de alto voltaje (ES) mientras que los lados izquierdos no fueron estimulados (NOES).  Bistés de longissimus lumborum ES y NOES se asignaron a tratamientos de maduración al vacío por 2 d (NOMADURADOS) ó 10 d (MADURADOS). Los bistés se evaluaron para fuerza de corte Warner-Bratzler (FCWB) y rasgos sensoriales calificados por panelistas capacitados. No se detectaron diferencias en valores FCWB, o calificaciones para jugosidad o intensidad de sabor entre tipos raciales (P > 0.05).  Los rasgos relacionados con terneza variaron poco con el tipo racial (P < 0.05). Los bistecs de F1ANG recibieron calificaciones más altas para terneza de fibra muscular, terneza general y cantidad de tejido conectivo, y difirieron (P < 0.05) de los F1ROM y F1SIM, que recibieron las calificaciones más bajas. Los bistés ES+MADURADOS tuvieron menor FCWB y mayores calificaciones para rasgos asociados con la terneza que los ES ó los MADURADOS (P < 0.05) alcanzando una mayor proporción (72%) de "bistés tiernos" (FCWB < 40.1 N) que la de MADURADOS (48%), ES (36%) y NOES-NOMADURADOS (24%) (P < 0.01). La mejora en terneza de lomos de toretes Brahman mediante cruzamiento con razas taurinas es marginal; por lo tanto, se requiere aplicar el tratamiento combinado de ES y maduración al vacío para asegurar una proporción mayor de bistés tiernos.Foram avaliados os efeitos de cruzamentos interraciais e tecnologias postmortem na qualidade do sabor de lombos de touros terminados a pasto. Cinquenta touros envelhecidos representando cinco tipos de raça (n = 10 cada): Brahman puro (BRAH), F1-Angus (F1ANG), F1-Chianina (F1CHI), F1-Romosinuano (F1ROM) e F1-Simmental (F1SIM) foram suplementados. pastado com uma conformação satisfatória com um peso vivo de ca. 480kg Toda as carcaças classificadas como “Boi” (Toretes) pela norma americana. Os lados direitos de cada canal foram submetidos à estimulação elétrica de alta voltagem (ES), enquanto os lados esquerdos não foram estimulados (NOES). Bifes ES e NOES longissimus lumborum foram submetidos a tratamentos de maturação a vácuo por 2 d (NOMATURED) ou 10 d (MATURED). Os bifes foram avaliados quanto à resistência ao cisalhamento Warner-Bratzler (FCWB) e características sensoriais avaliadas por provadores treinados. Não foram detectadas diferenças nos valores de FCWB, ou classificações de suculência ou intensidade de sabor entre os tipos de raça (P > 0,05). As características relacionadas à ternura variaram pouco com o tipo de raça (P < 0,05). Os bifes F1ANG receberam pontuações mais altas para maciez da fibra muscular, maciez geral e quantidade de tecido conjuntivo, e diferiram (P <0,05) do F1ROM e F1SIM, que receberam as pontuações mais baixas. Os bifes ES + MADUROS apresentaram menor FCWB e maiores classificações para características associadas à maciez do que os bifes ES ou MATURADOS (P < 0,05), atingindo uma proporção maior (72%) de "bifes macios" (FCWB < 40,1 N) do que os bifes MATURADOS (48 %), ES (36%) e NOES-NOMATURADO (24%) (P < 0,01). A melhora na maciez dos lombos de touros Brahman pelo cruzamento com raças tauromáquicas é marginal; portanto, o tratamento combinado de ES e envelhecimento a vácuo é necessário para garantir uma maior proporção de bifes macios

Predicción del rendimiento en cortes, hueso y grasa en búfalos de agua en Venezuela

The objectives of this study were to determine the association between carcass traits and the percentage yield in boneless cuts (PDC), bone, and fat trimmings of water buffalves; and to develop predicted equations for these variables. Forty-eight crossbred Murrah-Mediterránea buffaloes (24 steers and 24 bulls) were used slaughtered at 17, 19 and 24 months. Carcass and retail-yield-cut traits were evaluated. The following analyses were made: descriptive test, correlation, residual and multiple lineal regression. In castrated animals, subcutaneous fat and circumference round explained the majority of the variation in PDC. The dorsal fat thickness and the renal fat were the variables mostly associated with bone yield. In bulls, the subcutaneous fat and the carcass length explained most of the variation of PDC. The fat trimmings showed the highest correlation coefficient with the subcutaneous fat, and the bone yield was most correlated with the conformation. The equations obtained explained more than 50% of the variation in PCD, however equations for bone yield and fat trimmings showed a higher R2.The objectives of this study were to determine the association between carcass traits and the percentage yield in boneless cuts (PDC), bone, and fat trimmings of water buffalves; and to develop predicted equations for these variables. Forty-eight crossbred Murrah-Mediterránea buffaloes (24 steers and 24 bulls) were used slaughtered at 17, 19 and 24 months. Carcass and retail-yield-cut traits were evaluated. The following analyses were made: descriptive test, correlation, residual and multiple lineal regression. In castrated animals, subcutaneous fat and circumference round explained the majority of the variation in PDC. The dorsal fat thickness and the renal fat were the variables mostly associated with bone yield. In bulls, the subcutaneous fat and the carcass length explained most of the variation of PDC. The fat trimmings showed the highest correlation coefficient with the subcutaneous fat, and the bone yield was most correlated with the conformation. The equations obtained explained more than 50% of the variation in PCD, however equations for bone yield and fat trimmings showed a higher R2.Los objetivos de este estudio fueron determinar la asociación entre rasgos de la canal y el rendimiento en cortes (RCD), rendimiento en hueso y recortes de grasa en búfalos de agua, y desarrollar ecuaciones predictivas para cada variable mencionada. Se utilizaron 48 búfalos de agua (24 castrados y 24 enteros), sacrificados a los 17, 19 y 24 meses de edad con mestizaje de razas Murrah y Mediterránea. Se evaluaron las variables de la canal y del rendimiento en cortes. Se realizaron: pruebas descriptivas, análisis de correlación, residuos y de regresión lineal múltiple. En los castrados, el acabado de grasa y la circunferencia del muslo explicaron la mayor variación en RCD. El espesor de grasa y el porcentaje de grasa renal fueron las variables mayormente asociadas con el rendimiento en hueso. En los enteros, el acabado de grasa y la longitud de la canal explicaron la mayor variación en RCD. El recorte de grasa se asoció más con acabado de grasa, y el rendimiento en hueso se asoció con la conformación. Las ecuaciones obtenidas lograron explicar más del 50% de la variación del RCD. Las ecuaciones para recorte de grasa y rendimiento en hueso tuvieron mayor fuerza predictiva

Comparison of rose meat from the U.S. and Mexico with and without marination

El objetivo de este estudio fue evaluar las características sensoriales, la suavidad y la pérdida durante el cocinado del suadero marinado (MR) y sin marinar (NM) procedente de México y EE.UU. El suadero se comparó con la arrachera, ya que ésta es un corte muy demandado en forma marinada por el consumidor mexicano. Se usaron dos métodos de cocinado, uno a la parrilla (en seco) y otro al horno (con humedad). El marinado del suadero y la arrachera disminuyó la WBSF (P 0.05). El panel de consumidores calificó al suadero marinado mejor en aroma, jugosidad, sabor, textura y aceptación general que el no marinado (P 0.05). Consumers rated marinated rose meat higher than non-marinated rose meat for aroma, juiciness, flavor, texture, and overall acceptance (P <0.05). Marinated rose meat was more tender when cooked using moist heat (wetoven) than when grilled (P <0.05). Results of this study indicate that marinade improved the tenderness of rose meat and oven cooking of marinated rose meat produces lower WBSF values than grilling

Preliminary observations on carcass traits and meat yield of five types of Brahman-influenced grass-fed bulls

Benefiting from interventions of the savanna ecosystem, breeders in Los Llanos of Apure State (Venezuela) are exploring the opportunity to improve cattle genetics by implementing crossbreeding programs. &nbsp;Fifty yearling bulls of five types of Brahman influence [ST-Brahman (n = 10), F1 Angus x Brahman (F1-Angus; n = 10), F1 Chianina x Brahman (F1-Chianina; n = 10), F1 Romosinuano x Brahman (F1-Romosinuano; n = 10), and F1 Simmental x Brahman (F1-Simmental; n = 10)] were selected to be compared in carcass performance (linear measurements, quality and quantity indicators, Venezuelan and U.S. grades, and cutability) at a desirable conformation endpoint with a suitable market weight of 480 kg.&nbsp; Shorter ST-Brahman carcasses exhibited the most abundant finish, significantly different from the longer F1-Simmental and F1-Romosinuano counterparts.&nbsp; All carcasses fell into the A youngest maturity and were eligible for the USDA "Bullock “class designation; 62% reached the top Venezuelan quality grade, 96% graded US Standard and 64% reached the US yield grade 1, indicating superior cutability. Significant differences in yield of individual cuts (ribeye + strip loin, and cuts from the round) were detected between F1-Romosinuano and St-Brahman, F1-Angus and F1-Chianina counterparts.&nbsp; F1-Chianina bulls had slight but significant advantages in yield of high-valued boneless cuts as compared to those of F1-Romosinuano and F1-Simmental counterparts. Conversely, F1-Romosinuano outperformed F1-Chianina in 1.73 percentage points of medium-valued boneless cuts (P &lt; 0.05). &nbsp;Under the sample selection criteria and harvest endpoint, slight changes in carcass performance can be expected from crossbreeding.Con intervenciones del ecosistema sabana y aplicando un manejo adecuado de los pastos, ganaderos de Los Llanos del Estado Apure (Venezuela) estan explorando mejorar la genética del ganado con programas de cruzamiento.&nbsp; Cincuenta machos enteros añosos de cinco tipos raciales con influencia Brahman [Brahman puro (n = 10), F1 Angus x Brahman (F1-Angus; n = 10), F1 Chianina x Brahman (F1-Chianina; n = 10), F1 Romosinuano x Brahman (F1-Romosinuano; n = 10) y F1 Simmental x Brahman (F1-Simmental; n = 10)] se compararon en desempeño de la canal (mediciones lineales, indicadores de calidad y cantidad, categorías de clasificación y rendimiento carnicero) a un punto final de conformación deseable con un peso corporal aproximado de 480 kg.&nbsp; Canales más cortas de Brahman puros exhibieron acabado más abundante, diferente (P&lt;0.05) de las contrapartes más largas F1-Simmental y F1-Romosinuano.&nbsp; Todas las canales cayeron en la madurez más joven (A) y fueron elegibles para la designación de clase "Bullock" del USDA; el 62% alcanzó el grado de calidad superior venezolano (categoría A), el 96% calificó en el grado de calidad Standard y el 64% alcanzó el grado máximo de rendimiento carnicero (grado 1 USDA).&nbsp; Los toretes F1-Chianina tuvieron ventajas leves pero significativas en rendimiento en cortes deshuesados de alto valor, en comparación con los de F1-Romosinuano y F1-Simmental.&nbsp; Por el contrario, F1-Romosinuano superó a F1-Chianina en 1,73 puntos porcentuales de cortes deshuesados de valor medio (P &lt;0.05).&nbsp; Bajo los criterios de selección de la muestra y el punto final de la cosecha, no se pueden esperar grandes cambios en el rendimiento carnicero a partir del cruzamiento.Com o uso de tecnologias em um ecossistema de savana e aplicando um manejo adequado das pastagens, os criadores de Los Llanos do Estado de Apure (Venezuela) estão tentando melhorar a genética do gado através da utilização de programas de cruzamento. &nbsp;Cinquenta bovinos machos não castrados, com peso de abate de ~480 kg, de cinco cruzamentos com Brahman [Brahman puro (n = 10), F1 Angus x Brahman (F1-Angus; n = 10), F1 Chianina x Brahman (F1-Chianina; n = 10), F1 Romosinuano x Brahman (F1-Romosinuano; n = 10) e F1 Simental x Brahman (F1-Simental; n = 10)], foram comparados quanto às características (medidas lineares, indicadores de qualidade e quantidade e rendimento de desossa) y tipificacao de carcaça.&nbsp;&nbsp;&nbsp; Carcaças de Brahman puros apresentaram maior cobertura de gordura do que carcaças de animais F1-Simmental e F1-Romosinuano (P&lt;0.05).&nbsp; Todas as carcaças foram com maturidade “A” (jovem / Bullock), sendo que 96% se qualificaram no grau de qualidade USDA “Standard” e 64% alcançaram o grau máximo de rendimento de desossa (grau 1). &nbsp;Pelo padrão venezuelano, 62% das carcaças alcançaram o grau de qualidade superior (categoria A). &nbsp;Diferenças significativas foram detectadas no rendimento de cortes individuais (filé de costela e contrafilé e cortes do coxão) entre carcaças de F1-Romosinuano e F1-Simental e F1-Angus e F1-Chianina. Carcaças de F1-Chianina apresentaram maiores rendimentos em cortes desossados de alto valor em comparação com F1-Romosinuano e F1-Simmental. &nbsp;Carcaças de F1-Romosinuano tiveram 1,73 pontos percentuais a mais de rendimento em cortes desossados de valor intermediário, que carcaças de F1-Chianina (P &lt;0,05). Segundo os critérios de seleção da amostra e o ponto final de abate, não se podem esperar grandes mudanças na qualidade e rendimento das carcaças de diferentes cruzamentos. &nbsp

Comparison of water buffalo (Bubalus bubalis) vs Zebu-type intact males bovines in slaughter characteristics, carcass traits, cutability and longissimus palatability

Twenty-seven intact male water buffaloes of Murrah breeding (BUFFALOES) and 18 Zebu type bulls (CATTLE) were savannah-fed on the same ranch and slaughtered when they reached a desirable conformation to be compared in slaughter characteristics, carcass traits, cutability and meat palatability. Slaughter weight ranged 435 to 512kg for BUFFALOES and 375 to 494kg for CATTLE. Least square mean differences between species in percent head, cooler shrink, feet, blood and genitals were not significant (P&gt;.05). BUFFALOES had significantly heavier hides, larger gastrointestinal tract and higher (P&gt;.05) percentages of liveweight removed as organ fat. These body components are partly responsible for the significantly lower dressing percentages (- 6.5 %) of BUFFALOES vs CATTLE. Non-significant differences were found between species for total percentages of trimmed fat and bone, and percent yield (P&gt;.05) of the most expensive (high valued, boneless) cuts. CATTLE yielded higher percentages (P&lt;.05) of the medium-valued cuts (+1.39%) and the composite group of boneless (high and medium valued) cuts (+2.06%); whereas buffaloes exceeded (+.86%) cattle in the proportion of low-valued cuts (P&lt;.05). Significant Specie x Carcass weight interactions were detected for some retail components. Longissimus steaks from CATTLE exhibited higher (P&lt;.001) shear values (5.05kg vs 3.52kg)(P&lt;.001) and lower (P&gt;.05) overall tenderness ratings (4..3 vs 4.8). It was concluded that commercial disadvantages of BUFFALOES in dressing percent and cutability detected herein, could be overcome by designing marketing strategies promoting the buffalo meat as a high-quality product

Growth traits and carcass weights of purebred Brahman and F1 Brahman x Bos taurus bulls raised and fattened semi-intensively on improved savannah

To explore differences in growth traits, carcass weights and dressings percentages under improved, savannah-rearing conditions, five breed groups (purebred Brahman, PUREBREDS; F1 Angus, F1ANG; F1 Chianina, F1CHIA; F1 Romosinuano, F1ROMO; and F1 Simmental, F1SIM) of 10 contemporaneous bull calves each, were raised and fattened semi-intensively as a whole grazing lot. Data were analyzed for variance-covariance, using initial liveweight at each growth period, as a covariate. Adjusted daily gains (ADG) from birth to weaning for F1ANG, F1CHIA and F1ROMO outweighed (&gt; 77g/d; P&lt;.05) that of PUREBREDS. From weaning time up to 18m of age, F1ROMO and F1SIM outweighed PUREBREDS in ADG (&gt; 62g/d; P&lt;.05). F1 bulls were heavier than PUREBREDS at weaning and 18m, showing, espectively, differences of 20.4kg (11.5%; P=.10) and 20.6kg (9.5%; P=.0001). From 18m up to initiation of the fattening period (FATINITIATION, circa 23m of age), PUREBREDS and F1ANG surpassed in ADG (&gt; 80g/d; P&lt;.05) the remaining groups. Nevertheless, breed groups did not vary significantly (P&gt;.05) in FATINITIATION weights, fattening rates, and time of feeding. At the endpoint used herein, PUREBREDS and F1 bulls did not differ in slaughter age, carcass weight or dressing percentage (P&gt; .05). Under improved savannah feeding and management conditions, as described for this particular operation, crossbreeding allows product diversification of traditional Brahman cow-calf production systems by raising and/or fattening F1 young (&lt;28m of age) slaughter bulls