Fattening performance and carcass traits of implanted and supplemented grassfed bulls

Ninety-nine uncastrated males were randomly distributed into four grazing groups to examine variation in growth and carcass traits, due to the implant regime [Implantation of 72 miligrams (mg) of Ralgro® at day (d) 0 followed by its reimplantation at d 90 versus implantation of Revalor® at d 0 followed by 72 mg of Ralgro® at d 90)], and suplementation type [mineral supplementation (MS) versus strategic supplementation (SS)]. With a 2 x 2 factorial arrangement, the analysis of variance included the treatments and their interaction (implant regimen x supplementation) as fixed effects, and the breed type as a random effect. The interaction was not significant; neither did the implant regimen on any growth trait (P > 0.05). Compared to MS, the SS group had a greater daily weight gain (779 vs. 541 grams; P < 0.001), required a shorter (38.3 d lesser) time of fattening to reach the end point (198.3 versus 236.6 d; P < 0.001) with a heavier liveweight (498. 2 vs. 474. 4 kilograms; P = 0.02) at an earlier age (29.4 vs. 30.8 months; P < 0.001), with a higher carcass dressing percentage (59.13 vs 57.62 %; P = 0.03) and younger carcass bone maturity (P < 0.001). With the exception of thoracic depth, carcass traits did not vary with the implant regimen (P > 0.05). The use of aggressive implant regimens to improve growth or carcass characteristics of grazing bulls is not justified. SS is a feasible practice to improve fattening performance of grazing bulls but no beneficial impact on their carcass quality was expected.

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Effects of dietary threonine on growth performance and carcass traits of Yangzhou geese

Czech Journal of Animal Science ◽

10.17221/172/2009-cjas ◽

2010 ◽

Vol 55 (No. 9) ◽

pp. 382-387 ◽

Cited By ~ 3

Author(s):

S.R. Shi ◽

Z.Y. Wang ◽

J.M. Zou ◽

H.M. Yang ◽

N. Jiang

Keyword(s):

Weight Gain ◽

Growth Performance ◽

Dose Response ◽

Feed Intake ◽

Carcass Traits ◽

Daily Weight Gain ◽

Carcass Quality ◽

Quadratic Effect ◽

Large Margin ◽

Dietary Treatments

 A dose-response experiment with 5 total dietary threonine (Thr) levels (0.54, 0.64, 0.74, 0.84 and 0.94%) was conducted to study the effect of dietary Thr on growth performance and carcass traits of Yangzhou geese from 0 to 8 weeks of age. Three hundred 1-day-old Yangzhou goslings were randomly allocated to 15 pens with 20 birds (10 males and 10 females) per pen according to similar pen weight. There were 5 dietary treatments, consisting of 3 replicate pens. Weight gain, feed intake and feed/gain of geese from each pen were measured at 2-week intervals from 0 to 8 weeks. At 56 days of age, four geese (2 males and 2 females) were selected randomly from each pen and slaughtered to evaluate the carcass quality. The results showed that an increase in dietary Thr resulted in an increase and then a decrease in daily weight gain in both periods. Peak daily weight gain responses appeared in geese fed the 0.74%Thr diet in both periods (36.120 and 61.96 g, respectively). Thr supplementation significantly affected feed/gain in the 0–4 week period (P ≤ 0.045) and daily feed intake in the 5–8 week period (P ≤ 0.012). No significant linear or quadratic responses from Thr supplementation were observed in growth performance and carcass traits of geese except for eviscerated carcass percentage (quadratic effect, P ≤ 0.016). The optimal Thr requirement of Yangzhou geese from 0 to 8 weeks of age was 0.726% for eviscerated carcass percentage. The results of our experiment reported herein would document that the Thr requirements suggested by NRC (1994) for geese up to 8 weeks of age are safe estimates; they may slightly overestimate the requirements but not by a large margin.

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213 Genomic selection of carcass quality traits in crossbred pigs using a reference population

Journal of Animal Science ◽

10.1093/jas/skz258.082 ◽

2019 ◽

Vol 97 (Supplement_3) ◽

pp. 41-41

Author(s):

Matteo Bergamaschi ◽

Christian Maltecca ◽

Clint Schwab ◽

Justin Fix ◽

Francesco Tiezzi

Keyword(s):

Fixed Effects ◽

Carcass Traits ◽

Predictive Ability ◽

Reference Population ◽

Single Step ◽

Carcass Quality ◽

Quality Traits ◽

Single Gender ◽

Training Set ◽

Crossbred Pigs

Abstract The objective of this work was to evaluate the predictive ability of different models applied to carcass traits in crossbred pigs. The pigs were divided in 2 finishing flows: A=36,110 and B=95,041 animals, and were progeny of 386 sires (almost entirely genotyped with the 60k SNP chip). In flow A, individuals were housed into single-sire single-gender pens, and split-marketing on a pen basis was applied. In flow B, individuals were kept in standard commercial conditions and split-marketing on an individuals basis was applied. A dataset containing individual records of three carcass traits: back-fat (BF), loin depth (LD), and carcass daily gain (CACG) was used. Data from flow A were divided into training and validation sets on the basis of contemporary groups (8 in training and 1 in testing). Variance components and solutions were obtained using the BLUPF90 suite of programs. Models included fixed effects (dam line, sow parity, sex, cross fostering, and contemporary group) and random effects (additive genetic, batch, litter, and residual). Models tested were univariate vs multivariate and pedigree vs single-step. The addition of flow B records to the training set was evaluated, by including or excluding these records. Heritabilities were 0.68±0.023 for BF, 0.47±0.018 for LD, and 0.55±0.023 for CACG. CACG gain was correlated with BF (0.43±0.029) and LD (0.39±0.03). Low genetic correlation was found between BF and LD (0.17±0.034). Prediction accuracies were 0.39±0.05, 0.17±0.06, and 0.13±0.03 for BF, LD, and CACG respectively. The mean accuracy of BF, LD, and CG increased (~6%) when records from flow B were included in the training set, whereas the increase of accuracy between models (univariate vs multivariate) was not significant. The inclusion of sire genotypes did not improve prediction accuracy significantly. Based on these results, the prediction of carcass quality traits in crossbred pigs is possible.

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Comparison of Fattening, Slaughtering and Carcass Characteristics of Different Genotype Lambs Grown in Turkey

Indian Journal of Animal Research ◽

10.18805/ijar.b-1200 ◽

2020 ◽

Author(s):

Engin Yaralı

Keyword(s):

Weight Gain ◽

Carcass Characteristics ◽

Live Weight ◽

Daily Weight Gain ◽

Carcass Yield ◽

Live Weight Gain ◽

Fattening Performance ◽

Animal Material ◽

Dressing Percentage ◽

Fattening Period

In this study, it was aimed to determine the fattening performance, slaughter and carcass characteristics of lambs of Eþme Kývýrcýðý (EKIV), Bursa Kývýrcýðý (BKIV), Çine Çaparý (CC) and Karya (KAR) sheeps. A total of 37 male lambs at the age of 3.5 months formed the animal material. Fattening period is 56 days. During slaughtering, head, feet, skin, liver, hot carcass weights were determined and hot carcass yield was calculated. Each carcass was cut out into 7 parts. The overall average of daily weight gain was 144.82 g. While the highest daily live weight gain was observed in the KAR, the CC had the lowest value. The total share of the rump, shoulders, back and arms are 57.65%, 66.85%, 65.80% and 67.12% for CC, EKIV, KAR and BKIV, respectively. The effect of the genotype on all the characteristics other than cooling loss is important. In terms of dressing percentage value, the ranking was CC, BKIV, KAR and EKIV from the highest to the lowest.

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PSIII-10 The Effect of Sire Line on Grow-finish Performance, Carcass Characteristics, and Meat Pricing Variables for Commercial Crossbred Pigs

Journal of Animal Science ◽

10.1093/jas/skab054.286 ◽

2021 ◽

Vol 99 (Supplement_1) ◽

pp. 169-170

Author(s):

H Manu ◽

M Fletcher ◽

K Fang ◽

Sudario Roberto Silva Junior ◽

J Dunkelberger ◽

...

Keyword(s):

Feed Efficiency ◽

Fixed Effects ◽

Random Effect ◽

Carcass Characteristics ◽

White Female ◽

Large White ◽

Equivalent Number ◽

Genetic Source ◽

Crossbred Pigs ◽

Synthetic Line

Abstract The objective of this study was to evaluate the effect of sire line on wean-to-finish performance, carcass characteristics, and meat pricing variables. Pigs used for this study were the progeny of a commercial Landrace x Large White female mated to one of the following sire lines: a purebred Duroc line (Line S1), or a synthetic (Line S2) or purebred Duroc line (Line S3) originating from a different genetic source. An equivalent number of pigs (n =144) were used per group, for 432 pigs placed on test. Average initial weights per line were 6.67 ± 0.24, 6.67 ± 0.24, and 6.60 ± 0.24 for lines S1, S2, and S3, respectively. At placement, 8 pigs were assigned to each pen (split sex) and blocked by line and initial BW, with 18 replicates per line. Data were analyzed at the pen level using the PROC MIXED procedure of SAS, where the effects of line, sex, and line*sex were fitted as fixed effects and replicate was fitted as a random effect. Overall, piglets from line S2 (0.403 vs 0.381; P ≤ 0.0004) and line S3 (0.402 vs 0.381; P ≤ 0.001) had improved GF compared with piglets from line S1. The ADFI was greater in piglets from line S1 relative to piglets from line S2 (2.264 vs 2.117 kg; P ≤ 0.0001) and line S3 (2.264 vs 2.159 kg; P ≤ 0.004). The ADG, HCW, dressing yield, and loin depth were not different among treatment (P > 1.00). Piglets from line S3 had greater percent lean (57.12 vs 56.29 %; P ≤ 0.0001) and better carcass grade premium ($7.07 vs 6.60; P ≤ 0.0291) relative to piglets from line S1. In conclusion, line S1 piglets had greatest ADFI, but line S2 pigs and line S3 piglets had better feed efficiency. Line S3 pigs were leaner and had better carcass grade premium.

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PSX-19 Factors affecting growth and carcass trait performance of Canadian heavy lambs

Journal of Animal Science ◽

10.1093/jas/skz258.900 ◽

2019 ◽

Vol 97 (Supplement_3) ◽

pp. 457-457

Author(s):

Erin Massender ◽

Luiz Brito ◽

Angela Cánovas ◽

Delma Kennedy ◽

Flavio Schenkel

Keyword(s):

Evaluation System ◽

Fixed Effects ◽

Linear Models ◽

Random Effect ◽

Growth Trait ◽

Carcass Trait ◽

Classification Systems ◽

Carcass Weight ◽

Mixed Linear Models ◽

Factors Affecting

Abstract The profitability of meat lamb production is strongly dependent on growth and carcass trait performance of market lambs. The objective of this research was to test the significance of non-genetic factors on growth, ultrasound, and carcass traits of Canadian heavy lambs. Hot carcass weight (HCW, kg), fat depth at the GR site (FATGR, mm), average carcass conformation score (CONF, points), and total carcass value (PRICE, $CAD) were measured for 8,865 purebred lambs marketed through Quebec’s Heavy Lamb Sales Agency. Corresponding management information and growth trait records for over 19,000 animals with carcass records and their relatives were extracted from the Canadian Sheep Genetic Evaluation System. Single-trait mixed linear models in SAS were used to test the significance (P < 0.05) of various non-genetic effects, after a Scheffe adjustment for multiple comparisons. All models included categorical fixed effects of sex (male or female), breed (Hampshire, HA; Suffolk, SU; Canadian Arcott, CD; Polled Dorset, DP; Rideau Arcott, RI; Polypay, PO), dam age at parity (1 to 7+ years), and birth and rearing type (born as single, twin, or triplet and more, and reared as single or multiple), and a random effect of contemporary group. Linear covariates of slaughter age or carcass weight were included in the carcass trait models, while a scanning weight covariate was used for ultrasound trait models. Male lambs were found to be significantly heavier during growth, had greater HCW and PRICE, and lower FATGR and CONF than female lambs. As expected, terminal breeds (HA, SU, CD) tended to have greater growth, greater HCW and PRICE, and lower FATGR than maternal (DP, RI, RV, PO) breeds. This information could be utilized by Canadian sheep producers to manage their flocks to maximize the revenue of lambs marketed through price grid classification systems.

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PSVI-39 Molecular breeding value prediction of vaccination response against porcine reproductive and respiratory syndrome (PRRS) in replacement gilts

Journal of Animal Science ◽

10.1093/jas/skz258.409 ◽

2019 ◽

Vol 97 (Supplement_3) ◽

pp. 198-199

Author(s):

Carlos Martin Aguilar-Trejo ◽

Guillermo Luna-Nevárez ◽

Javier Alonso Romo-Rubio ◽

Milton G Thomas ◽

R Mark Enns ◽

...

Keyword(s):

Fixed Effects ◽

Molecular Breeding ◽

Random Effect ◽

Breeding Value ◽

Daily Weight Gain ◽

Substitution Effects ◽

Individual Response ◽

Phenotypic Variance ◽

Prrs Virus ◽

Vaccination Response

Abstract Porcine reproductive and respiratory syndrome (PRRS) is a viral disease that severely affects the Mexican swine industry. Vaccination of replacement gilts is mostly used to prevent PRRS; however, individual response to this protocol is highly-variable. The objective herein was to predict vaccination response against PRRS virus in gilts using molecular markers associated to rectal temperature (RT) and average daily weight gain (ADG). The study included 6-month old replacement gilts (n = 100) with a breed composition of ¾ Landrace x ¼ Yorkshire. Gilts were vaccinated with a modified live PRRS-virus (day 0) and kept inside the quarantine area on a farm where the gilts were lately exposed to PRRS. Data from RT and ADG were recorded weekly from day -7 through 35. Individual blood samples were collected at day 40, spotted onto FTA cards, and processed for genomic analyses using a 10k low-density SNP chip. Resulting genotypes were analyzed using a multi-locus mixed model, which identified 59 SNP associated with RT and ADG. These SNP were validated using a mixed-effects model which included SNP genotype and age of dam as fixed effects, and sire as random effect; then, their allele substitution effects were calculated. The additive effects for each SNP that showed a significant association (P < 0.05) with either RT or ADG were summed to calculate their corresponding molecular breeding value (MBV). The mean MBV were 0.28±0.04°C and 0.21± .05kg for RT and ADG, respectively. A reduced regression model which only included MBV was used to predict both RT and ADG. Coefficients of determination were 4.26 and 3.87% for RT and ADG, respectively (P < 0.01). These results suggest that only a small proportion of the phenotypic variance for RT and ADG was explained by SNP genotypes. We suggest additional studies to determine if the highly-variable vaccination response to PRRS is influenced by genetics.

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250 Effects of Bunk Management and Bulk Density of Steam-flaked Corn on Growth Performance, Carcass Characteristics, and Liver Score of Finishing Beef Cattle Fed Diets Without Tylosin Phosphate

Journal of Animal Science ◽

10.1093/jas/skab054.213 ◽

2021 ◽

Vol 99 (Supplement_1) ◽

pp. 127-128

Author(s):

Taylor M Smock ◽

Dale Woerner ◽

Kristin E Hales

Keyword(s):

Growth Performance ◽

Bulk Density ◽

Fixed Effects ◽

Management Strategy ◽

Block Design ◽

Average Daily Gain ◽

Random Effect ◽

Carcass Characteristics ◽

Liver Abscesses ◽

Randomized Complete Block Design

Abstract One hundred ninety-two beef steers (BW = 332 ± 8.2 kg) were used in a randomized complete block design to evaluate the effects of differing bunk management and bulk density of steam-flaked corn (SFC) in a randomized complete block design. A factorial arrangement of treatments was used with: 1) slick bunk management (SBM) + 335 g/L SFC; 2) modified ad libitum bunk management (MAL) + 335 g/L SFC; 3) SBM + 425 g/L SFC; 4) MAL+ 425 g/L SFC. Steers were randomly assigned to treatment within BW block, with 12 pen replications per treatment. Data were analyzed using a mixed model with fixed effects of bunk management, SFC bulk density, and their interaction. Block was included as a random effect. Bunk management strategy did not affect growth performance, carcass characteristics, or liver abscess score (P > 0.10). The average daily gain (ADG) of steers fed 425 g/L SFC was greater (P = 0.05) from days 35 to 105 than those fed 335 g/L SFC; however, overall ADG did not differ (P = 0.36). The DMI of steers fed 425 g/L SFC was greater (P ≤ 0.05) than those fed 335 g/L SFC. Gain-to-feed of steers fed 425 g/L SFC tended (P = 0.10) to be lesser from days 0 to 35 but did not differ overall (P ≥ 0.12). Steers fed 425 g/L SFC tended to have greater backfat and calculated empty body fat (P ≤ 0.07) than those fed 335 g/L SFC and had a greater calculated yield grade (P = 0.05). Steers fed 425 g/L SFC had 43.51% fewer (P = 0.04) liver abscesses. Bunk management strategy did not impact growth performance or carcass characteristics; whereas, SFC processed to 425 g/L increased DMI, fat thickness, and yield grade while resulting in a decreased proportion of liver abscesses.

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333 Effects of ruminally-protected lysine and Megasphaera elsdenii on performance and carcass characteristics of finishing cattle

Journal of Animal Science ◽

10.1093/jas/skz122.238 ◽

2019 ◽

Vol 97 (Supplement_2) ◽

pp. 134-134 ◽

Cited By ~ 1

Author(s):

Vanessa de Aguiar Veloso ◽

Lucas Horton ◽

Adrian Baker ◽

Celine Aperce ◽

James Drouillard

Keyword(s):

Body Weight ◽

Fixed Effects ◽

Mixed Model ◽

Block Design ◽

Random Effect ◽

Carcass Traits ◽

Feedlot Performance ◽

Muscle Area ◽

Freeze Dried ◽

Megasphaera Elsdenii

Abstract Crossbred steers (n = 448; 352 ± 25 kginitial body weight) were used to evaluate impact of Megasphaera elsdenii (ME; Lactipro advance, MS Biotec, Wamego, KS), alone or in combination with ruminally-protected lysine (RPL; USA Lysine, Kemin Industries, Inc., USA), on performance and carcass traits of finishing steers in a randomized complete block design. Steers were blocked by initial body weight and randomly assigned within block to one of 64 pens (7 steers/pen) in a 2 x 2 factorial treatment arrangement. Factors consisted of RPL (0 or 40 g/steer daily) and two step-up regimens (21-d without ME or 10-d with ME). Four step-up diets were used to transition cattle to finishing diets containing (dry basis) 60% steam flaked corn, 7% wheat straw, 30% sweet bran, and supplement. Diets were fed once daily ad libitum. Freeze-dried ME was re-hydrated and dosed orally (1x1010 CFU/steer) on d 1, and top-dressed (1x107 CFU/steer daily) onto diets daily thereafter. Data were analyzed using a mixed model with ME, RPL and the interaction as fixed effects, and block as the random effect. There were no interactions between ME and RPL (P > 0.05). Steers given ME consumed 16% less roughage compared to their counterparts without (P < 0.05), but gain, dry matter intake, and gain:feed were similar (P > 0.10). Administering ME tended to increase percentage of USDA Prime carcasses (0.5 vs 2.7%; P < 0.06). Feeding RPL did not affect feedlot performance, carcass weight, longissimus muscle area, marbling score, 12th-rib fat thickness, or liver abscess incidence (P > 0.10), but tended to increase yield grade (P < 0.07). In conclusion, use of Megasphaera elsdenii with an accelerated step-up program yielded feedlot performance and carcass traits comparable to those of cattle adapted with a conventional, 21-d step-up program, but supplemental lysine was without effect.

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A comparison of the Suffolk and Vendeen breeds when used as terminal sires for crossbred lamb production

Proceedings of the British Society of Animal Production (1972) ◽

10.1017/s0308229600024429 ◽

1993 ◽

Vol 1993 ◽

pp. 116-116

Author(s):

B G Merrell

Keyword(s):

Carcass Traits ◽

Carcass Characteristics ◽

Carcass Quality ◽

The Uk ◽

Terminal Sire ◽

Sire Breed

Lamb carcass quality is becoming economically more important. Crossbred lamb production in the UK is based upon the use of terminal sire breeds, chosen for carcass characteristics, mated to crossbred ewes, chosen for maternal attributes. The choice of terminal sire breed represents the most immediate option available to the commercial producer to improve the carcass characteristics of finished lambs. Previous studies (Croston, Guy, Jones, and Kempster, 1983; Cameron and Drury, 1985; Merrell, Webster and Ellis, 1990) have compared several terminal sire breeds, but these have tended to concentrate on the British Down breeds, particularly the Suffolk, and tne numerically more important imported breeds, such as the Texel and Charollais. Vendeen sheep were imported from France in 1981 but little information was available on growth and carcass traits of Vendeen crossbred lambs. A three year experiment compared, within a flock, the performance of the crossbred progeny of Suffolk and Vendeen rams.

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Türkiye’de Besiye Alınan Simmental, Aberdeen Angus, Hereford, Limousin ve Charolais Irkı Sığırların Besi Performansı ve Karkas Özellikleri

Turkish Journal of Agriculture - Food Science and Technology ◽

10.24925/turjaf.v5i11.1383-1388.1485 ◽

2017 ◽

Vol 5 (11) ◽

pp. 1383

Author(s):

Serdar Duru ◽

Halil Sak

Keyword(s):

Weight Gain ◽

Carcass Characteristics ◽

Carcass Weight ◽

Daily Weight Gain ◽

Initial Weight ◽

Fattening Performance ◽

Final Weight ◽

Ad Libitum ◽

Fattening Period ◽

Better Than

In this research, it was aimed to determine fattening performance and carcass characteristics of Simmental (SIM), Aberdeen Angus (ANG), Hereford (HER), Limousin (LIM) and Charolais (CHA) breeds. For this purpose, 606 male cattle between 10 and 12 months old imported from Uruguay and France in 2015 were used. All animals were fed ad-libitum for the same ration throughout the fattening period for approximately 7-9 months. Since the animals were slaughtered between April-June 2016, their fattening period were different. As a result of variance analysis, the effects of breed, initial weight (IW) and fattening period (FP) were found to be significant. For SIM (n=100), ANG (n=147), HER (n=149), LIM (n=104) and CHA (n=106); IW were 261.6, 267.3, 276.7, 264.1, 276.7 kg; FP were 206.7, 238.1, 261.4, 227.0, 283.6 days; final weight were 523.4, 543.3, 563.1, 545.5, 589.7 kg; daily weight gain were 1362.9, 1275.9, 1214.2, 1266.9, 1101.1 gr; hot carcass weight were 303.4, 317.7, 332.1, 319.3, 351.2 kg, respectively. CHA performed better than the others for the carcass weight, while SIM for daily weight gain is higher.

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