008 Hot Carcass Weight and Longissimus Muscle Area in F2 and F3 Nellore-Angus Steers

2016 ◽  
Vol 94 (suppl_1) ◽  
pp. 4-4
Author(s):  
J. S. Delgadillo ◽  
D. G. Riley ◽  
C. A. Gill ◽  
J. O. Sanders ◽  
J. E. Sawyer ◽  
...  
Keyword(s):  
Carcass Weight ◽  
Longissimus Muscle ◽  
Muscle Area

Genetic correlations among indicator traits for carcass composition measured in yearling beef bulls and finished feedlot steers

2005 ◽  
Vol 85 (4) ◽  
pp. 463-473 ◽  
Author(s):  
R. Bergen ◽  
S. P. Miller ◽  
J. W. Wilton
Keyword(s):  
Genetic Correlation ◽  
Carcass Traits ◽  
Genetic Correlations ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Muscle Size ◽  
Longissimus Muscle ◽  
Muscle Area ◽  
Feedlot Steers ◽  
Beef Bulls

Genetic correlations were examined among 10 live growth and ultrasound traits measured in yearling beef bulls (n = 2172) and four carcass traits measured in crossbred finished feedlot steers (n = 1031). Heritabilities ranged from 0.13 (bull ultrasound longissimus muscle width) to 0.83 (yearling bull hip height). Genetic correlations indicated that selecting yearling bulls for increased growth rate and hip height would lead to higher carcass weight, increased longissimus muscle area and reduced levels of carcass marbling in steers. Bull ultrasound fat depth was positively associated with both carcass fat depth and marbling score. Most ultrasound longissimus muscle size measurements in bulls were positively associated with each other and with carcass longissimus muscle area in steers, but the magnitude of the genetic correlation with carcass measurements depended on the bull longissimus muscle size trait in question. This suggests that longissimus muscle shape in bulls may be related to carcass weight, fat and muscle traits in steers. Results confirm that while ultrasound is a valuable tool for the genetic improvement of carcass traits in beef cattle, genetic correlations between live bull ultrasound and steer carcass traits less then unity suggest that selection would benefit from multiple trait evaluations in situations where reliable carcass data are available. Key words: Ultrasound, beef carcass, heritability, genetic correlation

scholarly journals Sire breed effect on carcass and temperament traits

2018 ◽  
Vol 39 (6) ◽  
pp. 2717
Author(s):  
Leandro Lunardini Cardoso ◽  
Joal José Brazzale Leal ◽  
Marcelo Henrique Giordano Nunes ◽  
Bruno Borges Machado Teixeira ◽  
Bruna Pena Sollero ◽  
...  
Keyword(s):  
Subcutaneous Fat ◽  
Carcass Weight ◽  
Longissimus Muscle ◽  
Muscle Area ◽  
Slaughter Weight ◽  
Subcutaneous Fat Thickness ◽  
Fat Thickness ◽  
Dressing Percentage ◽  
Productive Traits ◽  
Sire Breed

This paper aimed to identify and evaluate the effects of sire breed on temperament and productive traits of different cross-breeds between Nellore (NE), Tabapua (TB), and Brahman (BR) bulls mated with Angus cows (AN), as well as the relationship between temperament and productive traits. The productive traits measured in this study include slaughter weight and post weaning weight gain. Temperament was assessed by flight-speed (FS). Carcass data collected in this study include hot carcass weight, hot carcass percentage, cold dressing percentage, carcass length, initial pH, ultimate pH, subcutaneous fat thickness and carcass longissimus muscle area. The sire breed effect was greater for slaughter weight. Hot carcass weight was not affected by the sire breed. The longissimus muscle area was larger for AN x TB and AN x NE crossbreeds than for AN x BR crossbreeds. Subcutaneous fat thickness and cold dressing percentage were not affected by sire breed. The offspring of NE, TB, and BR sires mated with AN cows had similar carcass measurements, except for the longissimus muscle area, which was smaller for offspring sired by the Brahman breed. The temperament trait was not influenced by sire breed.

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

scholarly journals PSIV-19 Live and carcass production traits for progeny of an F1 USDA Prime – yield grade 1 carcass clone sire in comparison with progeny of popular reference sires

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 228-228
Author(s):  
Forest L Francis ◽  
Dean Hawkins ◽  
Gregg Veneklasen ◽  
David Lust ◽  
Ty Lawrence
Keyword(s):  
Carcass Weight ◽  
Morbidity And Mortality ◽  
Longissimus Muscle ◽  
Production Traits ◽  
Marbling Score ◽  
Muscle Area ◽  
Weaning Weight ◽  
High Performing ◽  
Fat Thickness ◽  
Normal Lungs

Abstract The cloning of beef carcasses that grade USDA Prime – Yield Grade 1 (P1) has produced a sire that ranked well against high performing bulls from multiple breeds. An F1 (P1 x P1) sire would ideally exhibit heterosis and outperform its high performing parents. A terminal sire study was conducted comparing progeny of an F1 (P1 x P1) sire (AxG1) against progeny (heifers and steers) of four high performing sires of varying breeds {P1 (Alpha); Angus; Simmental; Angus x Simmental}. Production traits included morbidity and mortality frequencies, weaning weight, and feedlot arrival weight; carcass traits included edible liver and normal lung frequencies, hot carcass weight, longissimus muscle area, 12th rib fat thickness, and marbling score. A completely randomized experimental design was used; data was analyzed using a mixed model with a fixed effect of sire and random effects of harvest date, sex, and pen. Feedlot arrival weight, frequencies of morbidity and mortality, 12th rib fat thickness, and frequency of grading Certified Angus Beef or USDA Select did not differ (P ≥ 0.16) between sires. Weaning weight and frequency of normal lungs tended (P ≤ 0.08) to differ amongst sires. Differences in hot carcass weight (P < 0.01), longissimus muscle area (P < 0.01), marbling score (P < 0.01), and frequencies of normal lungs (P < 0.01) was detected among sires. Additionally, sire differences in USDA yield grade (P < 0.01), and frequencies of carcasses grading USDA Prime (P < 0.01) and USDA Choice (P < 0.01) were observed. AxG1 progeny exhibited the least 12th rib fat thickness and lowest USDA yield grade in addition to the largest longissimus muscle area, highest marbling score, and greatest frequency of USDA Prime. These data suggest that AxG1 competed extremely well against other high performing industry sires.

scholarly journals PSIV-B-28 Late-Breaking: Performance and carcass quality of Nelore bull’s progenies with contrasting traits for precocity, growth and muscularity

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 319-321
Author(s):  
Taiane S Martins ◽  
Juliana Silva ◽  
Lenise Mueller ◽  
Tamyres Amorim ◽  
Annelise Aila G Lobo ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Average Daily Gain ◽  
Backfat Thickness ◽  
Longissimus Muscle ◽  
Muscle Area ◽  
Final Body Weight ◽  
Fat Thickness ◽  
Nelore Cattle ◽  
Daily Gain

Abstract The goal of this study was to evaluate the performance and the carcass traits of Nelore cattle progenies from bulls selected by contrasting traits for precocity, growth and muscularity, through the Expected Progeny Difference (EPD). One hundred and five Nelore bulls (initial weight of 350kg±15kg) and 20 months of age were confined and fed with same diet (73% of concentrate). Thirty-two animals were selected to create the contrasting groups for precocity, growth and muscularity (16 animals assigned as a low EPD group - LEPD and 16 animals assigned as a high EPD group - HEPD), based on the EPD of their parents. The ribeye area and backfat thickness were performed by ultrasonography of 12–13th rib fat thickness and longissimus muscle area (LMA), as well as rump fat thickness (RF) measurements. Animals were harvested after 100 days and during the deboning, meat cuts were weight for cutting yield. The animals selected for the HEPD group had greater average daily gain (P = 0.006), which can be explained by the higher feed intake (P = 0.006). However, there are no difference between groups for the final body weight (P = 0.254) and feed efficiency (P = 0.715). The LEPD group presented higher dressing percentage (P = 0.028). Although the groups evaluated did not presented difference in LMA (P = 0.329) and weight of longissimus muscle (P = 0.480), the weight of rump displayed heaviest in the HEPD (P = 0.037). There was no difference between groups for RF (P = 0.086). Nevertheless, backfat thickness was higher in HEPD group (P = 0.006). The present study indicates that Nelore cattle progenies, with parents displaying higher potential for precocity, growth, and muscularity, show greater backfat thickness and weightiest of rump than the other genetic backgrounds. Thanks to FAPESP for the scholarship (Grant # 2017/02349–1).

A study of operator effects on ultrasonic measures of fat depth and longissimus muscle area in cattle, sheep and pigs.

1991 ◽  
Vol 69 (1) ◽  
pp. 54 ◽  
Author(s):  
D G McLaren ◽  
J Novakofski ◽  
D F Parrett ◽  
L L Lo ◽  
S D Singh ◽  
...  
Keyword(s):  
Longissimus Muscle ◽  
Muscle Area

The area of eye muscle of beef cattle carcasses

1963 ◽  
Vol 3 (10) ◽  
pp. 249
Author(s):  
RM Seebeck
Keyword(s):  
Beef Cattle ◽  
Cross Sectional Area ◽  
Carcass Weight ◽  
Sectional Area ◽  
Muscle Area ◽  
Cross Sectional ◽  
Eye Muscle ◽  
Angus Cattle ◽  
The Cross

Variations in the cross-sectional area of eye muscle of carcasses cut between the tenth and eleventh ribs were investigated, using 105 Hereford and 51 Angus steers aged 20 months. These cattle consisted of three groups, born in successive years. At constant carcass weight, statistically significant differences in eye muscle area were found between breeds and between years. Breed and year differences were also found in eye muscle area with width and depth of eye muscle constant, so that there are limitations to the estimation of eye muscle area from width and depth measurements. A nomograph is given for estimating eye muscle area from width and depth for Hereford and Angus cattle, when all animals are reared in the same year and environment. The use of eye muscle area as an indicator of weight of carcass muscle is discussed.

scholarly journals Selection for higher body weight in Nelore cattle is effective in achieving an increase of longissimus muscle area without reducing subcutaneous fat thickness

2012 ◽  
Vol 41 (6) ◽  
pp. 1426-1432 ◽  
Author(s):  
Tiago Roque Pinheiro ◽  
Maria Eugênia Zerlotti Mercadante ◽  
Lucia Galvão de Albuquerque ◽  
Sarah Figueiredo Martins Bonilha ◽  
Fábio Morato Monteiro
Keyword(s):  
Body Weight ◽  
Subcutaneous Fat ◽  
Longissimus Muscle ◽  
Muscle Area ◽  
Subcutaneous Fat Thickness ◽  
Fat Thickness ◽  
Selection For ◽  
Nelore Cattle
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