PSIII-8 Sire breed differences for carcass attributes in feedlot steers using ultrasound technology

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 291-291
Author(s):  
Harley Buie ◽  
Noah P Jesko
Keyword(s):  
Pearson Correlation ◽  
Marbling Score ◽  
Live Animal ◽  
Feedlot Steers ◽  
Significant Difference ◽  
Ultrasound Measurements ◽  
Ribeye Area ◽  
Ultrasound Technology ◽  
Fat Thickness ◽  
Sire Breed

Abstract Live animal ultrasound measurements were taken on thirty-two feedlot steers and heifers for estimation of carcass endpoints including 12th rib fat thickness (FTU), ribeye area (REAU) and intramuscular fat (%FatU). Ultrasound measurements were collected by an inexperienced technician using an Aloka 500 ultrasound unit using Beef Image Analysis (BIA) software. The objective of the study was to evaluate carcass differences of four sire breed types including Angus (n = 11), Ultrablack (n = 6), Nelore (n = 6), Braunvieh (n = 1) and Angus X Nelore X Braunvieh hybrid (n = 8). Carcass data collected at harvest included 12th rib fat Thickness (FTC), Ribeye area (REAC), marbling score (MS), Yield Grade (YG), and Quality Grade (QG). The data were analyzed using SAS to determine breed effects. Means for FTU, FTC, REAU, REAC, %FatU and MS were 0.59 cm, 0.57 cm, 90.80 cm2, 83.53 cm2, 4.83%, and 483.75, respectively. There was no significant difference (P > 0.05) in YG and FT due to breed of sire. However, there was a trend for sire breed for ribeye area (P = 0.0728) for Angus X Nelore X Braunvieh cross and MS (P = 0.0786) for Ultrablack. Pearson correlation values between FTU and FTC, REAU and REAC, and %FatU and MS were 0.1217 (P = 0.05068), 0.3545 (P = .0465) and 0.5161 (P = 0.0025), respectively. These data suggest little differences existed in carcass attributes between various sire breeds out of a set of crossbred commercial cows.

274 Comparison of Two Ultrasound Systems for Estimation of Carcass Attributes in Feedlot Steers

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 142-143
Author(s):  
Noah P Jesko ◽  
Thomas L Perkins ◽  
Ty E Lawrence ◽  
John Richeson ◽  
Charles Looney
Keyword(s):  
Ultrasound Images ◽  
Marbling Score ◽  
The West ◽  
Live Animal ◽  
West Texas ◽  
Feedlot Steers ◽  
A Value ◽  
Animal Data ◽  
Ribeye Area ◽  
Highly Correlated

Abstract Sixty-eight (68) crossbred steers were evaluated using two real-time, B-mode ultrasound units to estimate final carcass attributes. The cattle were ultrasounded at the West Texas A&M research feedlot (Canyon, Texas) and carcass data was collected at the West Texas A&M Meats Laboratory (Canyon, Texas) or Tyson Fresh Meats (Amarillo, Texas). Objectives of the study were 1) to compare ultrasound live animal data to carcass attributes at harvest 2) to evaluate the performance differences between the ALOKA 500 (ALK) and the EVO ultrasound units All ultrasound images were captured by the same Ultrasound Guidelines Council (UGC) certified technician with images being processed at the UltraInsights Laboratory (Pierce, Colorado). The correlations between 12th rib fat thickness of the carcass (FTC) and ultrasound (FTU) were 0.84 for the ALK and 0.85 for the EVO, with no differences being found between the two units (P = 0.15). Correlations between the 12-13th rib carcass ribeye area (REAC) and ultrasound ribeye area (REAU) were 0.69 for the ALK and 0.66 for the EVO. There was no difference in REAU size between the two units. Carcass marbling score (MS) and ultrasound intramuscular fat (IMFU) correlations were 0.78 for the ALK and 0.84 for the EVO. The IMF data were found to be different between the two units, with the EVO measuring a mean IMFU value of 6.03 and the ALK a value of 5.26 with the change of 0.77 being different (P < 0.01). It is concluded that both ultrasound units performed favorably when predicting FTC and marbling score but were not highly correlated for REAU. It was found that the predictions between the two units on FT and REA were the same, though the EVO was higher on both. The IMFU values between the ALK and EVO were different, with the EVO again predicting higher values.

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.

scholarly journals PSIX-24 Comparison of serial real-time A-mode vs. B-mode ultrasound fat depth measures on prediction of final carcass value endpoints

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 332-332
Author(s):  
Chandler A Dockray ◽  
Tommy L Perkins ◽  
Flavio Riberio ◽  
Tylo J Kirkpatrick ◽  
Kaitlyn R Wesley ◽  
...  
Keyword(s):  
Real Time ◽  
Feeding Period ◽  
Ultrasound Scanning ◽  
Marbling Score ◽  
Trenbolone Acetate ◽  
Total Percentage ◽  
Ultrasound Measurements ◽  
Fat Thickness ◽  
Growth Promoting ◽  
Positive Correlations

Abstract Charolais x Angus steers (n = 80) were evaluated across a 378-day feeding period in response to administration of a growth promoting implant containing trenbolone acetate (TBA) and estradiol (E2) using A-mode and B-mode ultrasound. Steers were scanned at 42-d intervals (0, 42, 84, 126, 168, 210, 252, 294, 336) during 10 separate ultrasound scanning sessions 24-h prior to harvest. Ultrasound B-mode rump fat images (BRFU) were obtained by a certified Ultrasound Guidelines Council (UGC) technician using an ALOKA 500V console equipped with a 17.2 cm carcass probe. Ultrasound A-mode images (ARFU) were obtained by a non-UGC certified technician using a RENCO Lean Meater. Images of BRFU were analyzed by the CUP lab whereas ARFU image results were determined chute side by the scanning technician. Carcasses were dissected into total lean, fat and bone post-harvest. Rump fat thickness ultrasound measurements were compared to carcass traits used to determine carcass value. Carcass endpoints included 12th–rib fat thickness (FTC), 12th rib-eye area (REAC), marbling score (MARB), and total percentage of carcass fat (PCF). The correlation between BRFU and ARFU was 0.70 (P < 0.01). Positive correlations (P < 0.01) between ultrasound rump fat measures taken the day before harvest and carcass measurements indicated moderate relationships between BRFU and FTC (r=0.80); BRFU and REAC (r=0.66); BRFU and MARB (r=0.68); BRFU and PCF (r=0.75); ARFU and FTC (r=0.69); ARFU and REAC (r=0.76); ARFU and MARB (r=0.79); and ARFU and PCF (r=0.80). These results indicate A- and B-mode ultrasound measures of rump fat may be adequate measures for estimation of total percent carcass fat.

scholarly journals 40 Effect of calving season in an artificial insemination program on finishing performance and carcass traits

2020 ◽  
Vol 98 (Supplement_2) ◽  
pp. 60-60
Author(s):  
Taylor J Garcia ◽  
Colton A Robison ◽  
Paul A Beck ◽  
Ryan R Reuter ◽  
Blake K Wilson ◽  
...  
Keyword(s):  
Tallgrass Prairie ◽  
Artificial Insemination ◽  
Carcass Traits ◽  
Carcass Weight ◽  
Marbling Score ◽  
Weight Yield ◽  
Ribeye Area ◽  
Wheat Pasture ◽  
Fat Thickness ◽  
Calving Season

Abstract Spring (SPRING) and fall (FALL) born steers (n = 211) were used in a mixed effects model to evaluate calving season and conception method [artificial insemination (AI) or natural service (NS)] on finishing performance and carcass traits. SPRING were weaned in October, grazed dormant range for 90 days and grazed wheat pasture for 90 days before shipping to finish. FALL were weaned in May, and grazed tallgrass prairie for 120 days before shipping to finish. Initial and final BW, days on feed, ADG, DMI, and gain to feed efficiency were evaluated as performance measures. Dry matter intake and gain:feed were analyzed on pen basis. Hot carcass weight, yield grade, fat thickness, ribeye area, and marbling score were collected at harvest. Bodyweight of SPRING and AI steers were heavier (P ≤ 0.05) entering and leaving the feedlot than FALL and NS steers, respectively. Compared to FALL steers, ADG (P < 0.01) and DMI (P = 0.03) were greater for SPRING and required less days on feed (P ≤ 0.05). Calving season and conception method (P ≥ 0.2) did not affect gain:feed. Conception method (P = 0.5) did not affect ADG, DMI, and days on feed. SPRING had higher yield grades (P < 0.01) and increased in fat thickness (P = 0.01) compared to FALL steers. There were no differences (P = 0.2) in hot carcass weight, ribeye area, and marbling score due to season of birth. Steers born from AI mating had greater hot carcass weight (P = 0.01) and marbling score (P = 0.02), but conception method did not affect yield grade, fat thickness, and ribeye area (P > 0.2). These results demonstrate SPRING steers are heavier entering and leaving the feedlot, have higher ADG and DMI, and require less days on feed; however, gain:feed, hot carcass weight, ribeye area, and marbling score did not differ from FALL steers. An economic analysis is needed to validate an AI program based on calving season in north-central Oklahoma.

scholarly journals Are Marbling and the Prediction of Beef Eating Quality Affected by Different Grading Sites?

2021 ◽  
Vol 8 ◽  
Author(s):  
Jingjing Liu ◽  
Grzegorz Pogorzelski ◽  
Alix Neveu ◽  
Isabelle Legrand ◽  
David Pethick ◽  
...  
Keyword(s):  
Meat Quality ◽  
Economic Value ◽  
Assessment System ◽  
Eating Quality ◽  
Thoracic Vertebrae ◽  
Marbling Score ◽  
Cull Cows ◽  
Global Quality ◽  
Significant Difference ◽  
Fat Thickness

For the European abattoirs, the preferred carcass grading site is at the fifth rib, and cutting at the tenth rib as in Australia could lead to a lower economic value of the carcass. Therefore, the objective of this study was to compare the grading scores of marbling and the meat and fat color on Musculus longissimus thoracis et lumborum (LTL) at the fifth and the tenth thoracic vertebrae. The consequences on the prediction of beef eating quality using the Meat Standards Australia (MSA) grading scheme were also evaluated for cull cows, which produce the majority of beef consumed in France. Carcasses from 208 French cattle, mainly Limousine cows, were graded according to the Australian Beef Carcase Chiller Assessment System (ABCAS) used for the implementation of the MSA system. The results indicate that there was no significant difference in the marbling score, between the fifth and the tenth ribs and hence in the MSA index and in the Global Quality [meat quality (MQ4)] scores calculated from marbling values from either the fifth rib or the tenth rib. However, the meat color at the tenth rib was significantly darker than that at the fifth rib (p < 0.01), and the fat color at the tenth rib was significantly yellower than that at the fifth rib (p < 0.001). The results of this study suggest that the grading of marbling can be conducted on M. LTL at the fifth thoracic vertebrae for routine use of the MSA system in France and, more generally, in Europe. However, further investigation and adjustment would be needed for other critical MSA scores (such as rib fat thickness) while respecting the European carcass quartering practices.

scholarly journals Using actual and ultrasound carcass information in beef genetic evaluation programs

2009 ◽  
Vol 38 (spe) ◽  
pp. 58-63 ◽  
Author(s):  
Joseph Keith Bertrand
Keyword(s):  
Carcass Traits ◽  
Genetic Evaluation ◽  
Marbling Score ◽  
Genetic Progress ◽  
Live Animal ◽  
Slaughter Cattle ◽  
Fat Thickness ◽  
The Subject ◽  
Evaluation Programs ◽  
Accuracy Of Prediction

Increased movement toward alliances and grid pricing in the U.S. has led to an increase interest in genetic values for carcass traits. The literature suggests that carcass genetic values are an effective tool to enhance selection for carcass traits, and that it is possible to select sires within a breed that can increase marbling score without adversely affecting external fat thickness or percent retail product relative to the breed mean. Ultrasound has been investigated as a cheaper means of collecting carcass information. The literature indicates that carcass traits measured via ultrasound on yearling seedstock will respond to selection. Although the literature is variable on the subject, there are reported genetic correlation (r g) estimates between live animal ultrasound and actual carcass attributes that are greater than .70 for all ultrasonically measured carcass traits. When r g between seedstock ultrasound and slaughter cattle carcass measures are > 0.70, similar or greater genetic progress in finished cattle carcass merit could be achieved by using ultrasound information entirely compared to using typical carcass progeny information; however, the maximum accuracy of prediction using ultrasound information in lieu of finished cattle carcass information would be r g. Therefore both actual and live animal, ultrasonically measured carcass traits should be included in genetic evaluation programs, which will allow for an increase in the accuracy of prediction of carcass genetic values on young seedstock animals due to the inclusion of ultrasound information, and will also allow for the possible production of high accuracy sires based on finished cattle progeny carcass information. Multi-breed models are being developed to allow for the prediction of genetic values for carcass traits in populations composed of animals of varying breed composition.

Effects of season of birth, breed of sire and sex of calf in a single-suckled Aberdeen Angus Holstein beef herd

1983 ◽  
Vol 37 (3) ◽  
pp. 365-374
Author(s):  
L. L. Wilson ◽  
E. Abdul-Jamak ◽  
P. J. LeVan ◽  
R. F. Todd ◽  
J. L. Watkins ◽  
...  
Keyword(s):  
Sex Differences ◽  
Live Weight ◽  
Taste Panel ◽  
The Other ◽  
Season Of Birth ◽  
Marbling Score ◽  
Beef Herd ◽  
Fat Thickness ◽  
Main Effects ◽  
Sire Breed

ABSTRACTData were obtained from 233 heifers and 246 steers born in the autumn (September) or spring (March) seasons. The calves were sired by Polled Hereford (British) and Charolais, Chianina, Limousin. Maine- Anjou and Simmental (Continental European) bulls, from Aberdeen Angus (♂ × Holstein ♀ cows. Autumn-born calves weighed more at birth than did spring-born calves ( P < 0·01 ). Season of birth did not affect 205-. 305-. 365-day or slaughter weights. Incidence of dystocia was greater for Maine-Anjousired calves than for Polled Hereford calves (P < 0·05) with the other breeds intermediate. Significant sex differences were observed in practically all live and carcass traits with the exception of Warner- Bratzler tenderness and taste panel evaluations.There were significant breed effects in which Continental European-sired calves gained weight more rapidly than did Polled Hereford-sired calves (P < 0·01) within each 90-day period, with the exception of 180 to 270 days. Slaughter weight and carcass weight per day of age followed the same trend. At slaughter at a mean age of 416 days, mean live weight of calves from Continental European breeds of sire was 1·075 of that of the Polled Hereford-sired calves. Proportion, weight and gain per day of edible meat in the carcass were greater for calves sired by Continental European bulls (P < 0·01). Although fat thickness and marbling score means were greater for Polled Hereford-sired cattle (P < 0·01), there were no significant differences in taste panel evaluations. There were no important two-way interactions between the main effects (sex, season of birth or sire breed).

scholarly journals PSVII-19 Serial ultrasound measures of implanted and non-implanted feedlot steers to determine carcass endpoints

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 292-293
Author(s):  
Tommy L Perkins ◽  
Flavio Riberio ◽  
Tylo J Kirkpatrick ◽  
Kaitlyn R Wesley ◽  
Sierra L Pillmore ◽  
...  
Keyword(s):  
Least Square ◽  
Longissimus Muscle ◽  
Marbling Score ◽  
Muscle Area ◽  
Final Body Weight ◽  
Start Date ◽  
Feedlot Steers ◽  
Fat Thickness ◽  
Growth Promoting ◽  
Implant Treatment

Abstract An Aloka SSD-500V real-time ultrasound unit, equipped with a 17.2cm carcass probe, was used to serially scan feedlot steers (n = 80; initial BW 271 ± 99) at 42-d intervals during a 378-d feeding period by a certified Ultrasound Guidelines Council (UGC) technician. This included 10 separate ultrasound scanning sessions following the initial weight and ultrasound data taken on day minus 7 (one week prior to initial start date). Steers were randomly assigned to implant treatment (REV) or not (CON) at day -7 with the implanted group being re-implanted on day 190. Cattle were weighed and scanned for 12th-rib fat thickness (FTU), 12th-rib longissimus muscle area (LMAU), percentage intramuscular fat (%FATU), and rump fat thickness (RFU) to determine the ability of ultrasound to predict carcass grading outcomes at harvest in implanted vs non-implanted steers. Eight steers were harvested each 42 days and evaluated 48h after harvest to determine final body weight (FBW), 12th-rib fat thickness (FTC), 12th-rib longissimus muscle area (LMAC), and marbling score (MARB). Data were analyzed to determine treatment (TRT) and days on feed (DOF) interactions using the GLIMMIX procedure. Least square (LS) means illustrated differences (P &lt; 0.05) between TRT for FBW, FTU, REAU, and %FATU. No differences (P = 0.088) between TRT for RFU were observed. Differences (P &lt; 0.05) between DOF were observed for FBW through all 10 weigh days. A difference (P &lt; 0.05) across DOF for days 42, 84, 126, 168, 210, 252, and 294 was noted for FTU. These data suggest growth promoting implants cause differences (increases) in weight and traditional ultrasound measures of carcass endpoints.

scholarly journals PSIX-27 Evaluation of real-time ultrasound to predict pre-harvest market endpoints in serial slaughtered British x Continental steers administered an E2+TBA implant treatment vs non-implanted controls

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 331-332
Author(s):  
Becca B Grimes ◽  
Tylo J Kirkpatrick ◽  
Travis Tennant ◽  
Ty Lawrence ◽  
Kimberly B Cooper ◽  
...  
Keyword(s):  
Real Time ◽  
Pearson Correlation ◽  
Longissimus Muscle ◽  
Marbling Score ◽  
Muscle Area ◽  
Start Date ◽  
Fat Thickness ◽  
Positive Correlations ◽  
Implant Treatment ◽  
Strong Relationships

Abstract Steers (n = 80; initial BW 271 ± 99) were serially scanned at 42-d intervals during a 378-d feeding period using an Aloka 500 device by a certified Ultrasound Guidelines Council (UGC) technician using real-time ultrasound. This included 10 separate ultrasound scanning sessions following the initial weight and ultrasound data taken on day minus 7 (one week prior to initial start date). Steers were randomly assigned to implant treatment (either implanted with Revalor XS or not) at day -7. Cattle were weighed and scanned for 12th-rib fat thickness (FTU), 12th-rib longissimus muscle area (LMAU), percentage intramuscular fat (%FATU), and rump fat thickness (RFU) to determine the ability of ultrasound to predict carcass grading outcomes at harvest. Scans were processed by CUP Lab technicians. Eight steers were harvested each 42 days. Carcasses were assessed 48h after harvest to determine 12th-rib fat thickness (FTC), 12th-rib longissimus muscle area (LMAC), and marbling score (MARB). Data were analyzed via Pearson correlation and linear regression to determine the relationship of ultrasound measures to carcass outcomes. Positive correlations (P &lt; 0.01) between ultrasound measures taken the day before harvest and carcass measurements indicated strong relationships between FTU and FTC (r = 0.91), LMAU and LMAC (r = 0.93), and moderately strong relationships between %FATU and MARB (r = 0.76). Prediction equations were generated to estimate FTC = .0088 + (1.02585 x FTU), LMAC = 16.29720 + (0.77197 x LMAU) and MARB = 19.87510 + (5.19832 x %FATU). Results suggest real-time ultrasound data provides an effective tool to estimate carcass outcomes pre-harvest.

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