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.

Heritability and correlation estimates of Warner-Bratzler shear force and carcass traits from Angus-, Charolais-, Hereford-, and Simmental-sired cattle

2004 ◽  
Vol 84 (4) ◽  
pp. 599-609 ◽  
Author(s):  
J. A. Minick ◽  
M. E. Dikeman ◽  
E. J. Pollak ◽  
D. E. Wilson
Keyword(s):  
Beef Cattle ◽  
Key Words ◽  
Shear Force ◽  
Genetic Parameters ◽  
Carcass Traits ◽  
Genetic Correlations ◽  
Carcass Weight ◽  
Carcass Quality ◽  
Marbling Score ◽  
Ribeye Area

Heritabilities and correlations of Warner-Bratzler shear force (WBSF), marbling score (MS), hot carcass weight (HCW),12–13th rib-fat (FAT), and ribeye area (REA) were calculated from 3360 Angus-, Charolais-, Hereford-, and Simmental-sired cattle in the C attleman’s Beef Board Carcass Merit Project. The heritabilities (± SE) for WBSF, MS, HCW, FAT, and REA were 0.34 ± 0.25, 0.43 ± 0.28, 0.73 ± 0.35, 0.16 ± 0.19, and 0.56 ± 0.31 in Angus; 0.43 ± 0.22, 0.30 ± 0.18, 0.21 ± 0.16, 0.35 ± 0.20, and 0.23 ± 0.16 in Charolais; 0.12 ± 0.11, 0.55 ± 0.22, 0.20 ± 0.14, 0.25 ± 0.15 and 0.34 ± 0.17 in Hereford; and 0.16 ± 0.14, 0.44 ± 0.20, 0.45 ± 0.20, 0.23 ± 0.16, and 0.30 ± 0.18 in Simmental. The genetic correlations, averaged across analysis type, for WBSF-MS, WBSF-HCW, WBSF-FAT, WBSF-REA, MS-HCW, MS-FAT, MS-REA, HCW-FAT, HCW-REA, and FAT-REA were -0.17, 0.32, -0.23, 0.30, 0.10, -0.17, 0.39, -0.15, 0.68, and -0.86 in Angus; -0.42, 0.77, 0.52, -0.05, -0.44, -0.22, -0.19, 0.66, -0.05, and -0.24 in Charolais; -0.43, -0.04, -0.33, 0.09, 0.08, 0.79, -0.14, -0.26, 0.50, and -0.38 in Hereford; and 0.55, 0.08, 0.62, -0.08, 0.30, 0.61, -0.14, 0.06, 0.65, and -0.48 in Simmental. Key words: Beef cattle, genetic parameters, carcass quality, tenderness

Contributions of preweaning growth information and maternal effects for prediction of carcass trait breeding values among crossbred beef cattle

1999 ◽  
Vol 79 (1) ◽  
pp. 17-25 ◽  
Author(s):  
D. H. Crews Jr. ◽  
R. A. Kemp
Keyword(s):  
Birth Weight ◽  
Beef Cattle ◽  
Maternal Effects ◽  
Carcass Traits ◽  
Carcass Trait ◽  
Genetic Effects ◽  
Carcass Weight ◽  
Ribeye Area ◽  
Fat Thickness ◽  
Daily Gain

Preweaning and carcass trait records from crossbred steers (n = 1015) and heifers (n = 957) were used to estimate genetic parameters and to investigate the efficacy of maternal effects and preweaning growth information for improving estimation of EBV for carcass traits for crossbred beef cattle. Dams (n = 775) representing three F1 and twelve back-cross combinations involving the Charolais, Hereford, Angus, Simmental and Shorthorn breeds were mated over six years to Limousin bulls (n = 36) at two locations in western Canada. Four animal models, involving from zero to three maternal (co)variances were used to analyze four carcass traits. Rank and simple correlations indicated that maternal effects were relatively unimportant for estimation of direct carcass trait breeding values. Direct heritabilities were 0.28, 0.12 and 0.16 for birth weight, preweaning daily gain and weaning weight, and were 0.20, 0.35, 0.50 and 0.38 for hot carcass weight, fat thickness, ribeye area and percent lean yield, respectively. Maternal heritabilities were 0.21, 0.22 and 0.40 for birth weight, preweaning daily gain and weaning weight, respectively. Estimated genetic correlations between percent lean yield and hot carcass weight, fat thickness and ribeye area were –0.05, –0.85 and 0.39, respectively, and 0.30 between hot carcass weight and ribeye area. Direct genetic effects for birth weight had moderate (0.51 to 0.54) correlations with direct effects for carcass weight, ribeye area and percent lean yield. Direct genetic effects for fat thickness were negatively correlated with direct effects for birth weight (−0.44), preweaning daily gain (−0.15) and weaning weight (−0.25). Maternal genetic effects for preweaning traits had near-zero correlations with direct genetic effects for fat thickness and percent lean yield. Adding preweaning growth information to genetic evaluations for carcass traits slightly decreased prediction error variances for breeding values and would be recommended when information on carcass traits is limited. Key words: Genetic evaluation, carcass traits, beef cattle

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.

scholarly journals Reduction of slaughter age of Hanwoo steers by early genotyping based on meat yield index

2020 ◽  
Vol 33 (5) ◽  
pp. 770-777
Author(s):  
Chang Dae Jeong ◽  
Mahfuzul Islam ◽  
Jong-Joo Kim ◽  
Yong-Il Cho ◽  
Sang-Suk Lee
Keyword(s):  
Snp Array ◽  
Carcass Weight ◽  
Related Gene ◽  
Marbling Score ◽  
Meat Yield ◽  
Growing Period ◽  
Slaughter Age ◽  
Snp Array Analysis ◽  
Fat Thickness ◽  
Highly Correlated

Objective: This study was conducted to determine early hereditary endowment to establish a short-term feeding program.Methods: Hanwoo steers (n = 140) were equally distributed into four groups (35/group) based on genetic meat yield index (MYI) viz. the greatest, great, low, and the lowest at Jukam Hanwoo farm, Goheung. All animals were fed in group pens (5 animals/pen) with similar feed depending on the growth stage. Rice straw was provided ad libitum, whereas concentrate was fed at 5.71 kg during the growing period (6 to 13 mo) and 9.4 kg during the fattening period (13 to 28 mo). Body weight (BW) was measured at two-month intervals, whereas carcass weight was determined at slaughtering at about 31 months of age. The Affymetrix Bovine Axiom Array 640K single nucleotide polymorphism (SNP) chip was used to determine the meat quantity-related gene in the blood.Results: After 6 months, the highest (p<0.05) BW was observed in the greatest MYI group (190.77 kg) and the lowest (p<0.05) in the lowest MYI group (173.51 kg). The great MYI group also showed significantly (p<0.05) higher BW than the lowest MYI group. After 16 and 24 months, the greatest MYI group had the highest BW gain (p<0.05) and were therefore slaughtered the earliest. Carcass weight was significantly (p<0.05) higher in the greatest and the great MYI groups followed by the low and the lowest MYI groups. Back-fat thickness in the greatest MYI group was highly correlated to carcass weight and marbling score. The SNP array analysis identified the carcass-weight related gene BTB-01280026 with an additive effect. The steers with the allele increasing carcass weight had heavier slaughter weight of about 12 kg.Conclusion: Genetic MYI is a potential tool for calf selection, which will reduce the slaughter age while simultaneously increasing carcass weight, back-fat thickness, and marbling score.

Effect of feeding different physical forms of diets on performance and carcass traits of goats

2002 ◽  
Vol 82 (3) ◽  
pp. 471-473 ◽  
Author(s):  
L. A. Goonewardene ◽  
A. Suleiman ◽  
E. K. Okine
Keyword(s):  
Key Words ◽  
Feed Intake ◽  
Carcass Traits ◽  
Carcass Weight ◽  
Alfalfa Hay ◽  
Ribeye Area ◽  
Effect Of Feeding

Feding different physical forms of diets on performance and carcass traits of goats was studied. Thirty-six wethers were fed total mixed diets of either whole or rolled barley mixed with grass-alfalfa hay either chopped to 2.5 or 5 cm lengths. No differences (P > 0.05) in ADG (76.6 to 84.8 g d-1), feed intake (0.92 to 1.01 kg d-1), F:G (12.2 to 13.1 kg kg-1), hot carcass weight (13.5 to 14.1 kg), dressing %, (45.0 to 45.7%) and ribeye area (10.9 to 13.1 cm2) were observed among goats fed the four dietary combinations. Key words: Processing, feeds, goats, performance, carcass

Effect of zeranol on fat deposition and carcass traits in beef heifers

1992 ◽  
Vol 72 (4) ◽  
pp. 965-968 ◽  
Author(s):  
B. D. King ◽  
R. D. Bergen ◽  
J. J. McKinnon ◽  
R. D. H. Cohen ◽  
R. N. Kirkwood
Keyword(s):  
Key Words ◽  
Carcass Traits ◽  
Fat Deposition ◽  
Carcass Weight ◽  
Beef Heifers ◽  
Marbling Score ◽  
Meat Yield ◽  
Lean Meat ◽  
Beef Heifer

Non-pregnant beef heifers implanted with zeranol at birth and at 100 and 200 d of age were fed a finishing ration for 78 d to slaughter at 21–22 mo of age. Rate of fat deposition, grade fat and marbling score were less (P < 0.05) and carcass weight, rib-eye area and lean-meat yield were greater (P < 0.05) for implanted heifers than for non-implanted heifers. Key words: Zeranol, ultrasound, fat deposition, carcass, beef heifer

A survey of marbling fat in Canadian beef carcasses

1991 ◽  
Vol 71 (4) ◽  
pp. 987-991 ◽  
Author(s):  
S. D. M. Jones ◽  
A. K. W. Tong ◽  
S. Talbot
Keyword(s):  
Key Words ◽  
Carcass Weight ◽  
Point Scale ◽  
Marbling Score ◽  
Beef Carcasses ◽  
Fat Thickness ◽  
Beef Carcass

Marbling score was assessed in 20 437 Canadian beef carcasses on a 10-point scale (1 = very abundant, 10 = devoid) in six provinces during the period August to November 1989. Heifer carcasses had a lower marbling score (more marbling fat) than steer carcasses, and both had lower marbling scores (more marbling fat) than bull carcasses. Marbling increased as Canada grade changed from B1 to A1 and from A1 through to A4, indicating that marbling fat increased with carcass fatness. The regression of marbling score on carcass weight and carcass 12th rib fat thickness, although significant, showed that these traits only accounted for 0.5 and 6%, respectively, of the overall variation in marbling score. The overall distribution of marbling scores showed that 20.6% of carcasses had small or more marbling, 57.9% had slight marbling, 20.4% had traces of marbling and 1.1% were devoid of marbling. Key words: Beef, carcass, marbling, survey

scholarly journals Market weight, slaughter age, and yield grade to determine economic carcass traits and primal cuts yield of Hanwoo beef

2021 ◽  
Author(s):  
Ki-Mun Kwon ◽  
Hwa-Eun Jeon ◽  
Seung-Ju Han ◽  
Hee-Chan Woo ◽  
Sung-Min Heo ◽  
...  
Keyword(s):  
Carcass Traits ◽  
Production Yield ◽  
Backfat Thickness ◽  
Marbling Score ◽  
Breeding Method ◽  
Ribeye Area ◽  
Percentage Yield ◽  
Slaughter Age ◽  
Native Cattle ◽  
The Individual

Abstract ObjectiveThis study was conducted to evaluate the relationship between market weight, slaughter age, yield grade, and primal cut yield in Hanwoo. MethodsA total of 403 Hanwoo (Korean native cattle) was assessed for carcass traits such as carcass cold weight, backfat thickness, ribeye area, dressing percentage, yield index, and marbling score. The production yield of the individual major primal cuts of Hanwoo beef was also measured. FindingsCarcass cold weight, ribeye area, and backfat thickness, which affect meat quality increased with increased market weight (p<0.05). The production yield of the ten major primal cuts also increased with increased market weight (p<0.05). In terms of slaughter age, carcass cold weight, ribeye area, and backfat thickness all increased from 25 months to 28-29 months, and the production yield of all prime cuts also increased with increasing slaughter age. According to the meat yield grade, carcass cold weight and backfat thickness increased from grade A to grade C, although the ribeye area was not affected. The combined findings of the study suggest that slaughtering Hanwoo at the weight of 651-700 kg and 701-750 and age of 28.23 and 29.83 months might be desirable to achieve the best quality and quantity grade of Hanwoo beef. However, the positive correlation of carcass cold weight and backfat thickness, and the negative correlation of the yield index according to primal cuts yield indicated that it is necessary to couple the slaughtering management of cattle with improved genetic and breeding method of Hanwoo to increase the production yield of the major prime cuts of Hanwoo beef.

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 Estimates of genetic parameters for growth and carcass traits in Charolais cattle

1992 ◽  
Vol 72 (3) ◽  
pp. 493-499 ◽  
Author(s):  
D. J. Johnston ◽  
L. L. Benyshek ◽  
J. K. Bertrand ◽  
M. H. Johnson ◽  
G. M. Weiss
Keyword(s):  
Genetic Parameters ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Carcass Weight ◽  
Longissimus Muscle ◽  
Marbling Score ◽  
Multiple Trait ◽  
Muscle Area ◽  
Relative Growth ◽  
Charolais Cattle

Growth and carcass records were obtained on 1444 progeny, representing 53 Charolais sires from 7 yr of the Canadian Charolais Association Conception to Consumer Program. After weaning, all calves entered a commercial feedlot, where they remained on feed until they were visually appraised to grade A1 or A2, at which time they were slaughtered. The average age, backfat and carcass weight at slaughter were 417 d, 8.9 mm and 306 kg, respectively. Carcass weight, longissimus muscle area, marbling and number of days from on test to slaughter were adjusted to a fat constant end point of 8.9 mm of backfat. Genetic, phenotypic and environmental relationships were computed from variances and covariances estimated using a multiple-trait sire model with restricted maximum likelihood procedures between all pairwise combinations of growth and carcass traits. The following heritabilities were determined: birth weight, 0.25; 200-d adjusted weaning weight, 0.09; 365-d adjusted yearling weight, 0.16; feedlot test average daily gain, 0.19; relative growth rate, 0.18; number of days from on test to slaughter, 0.24; carcass weight, 0.09; longissimus muscle area, 0.38; and marbling score, 0.26. Carcass weight had a positive genetic correlation with longissimus muscle area (0.45) and number of days from on test to slaughter (0.29) but correlated negatively with marbling score (−0.31). Longissimus muscle area was negatively correlated with marbling score (−0.24). Key words: Beef cattle, growth and carcass traits, genetic parameters

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