COMPARISON OF ANABOLIC IMPLANTS ON REPRODUCTIVE FUNCTION, PERFORMANCE AND CARCASS CHARACTERISTICS IN WEANED BEEF BULLS

1988 ◽  
Vol 68 (2) ◽  
pp. 367-376 ◽  
Author(s):  
S. J. GORDON ◽  
H. L. MILLER ◽  
D. H. GEE ◽  
D. P. EVENSON
Keyword(s):  
Chromatin Structure ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Reproductive Function ◽  
Sperm Chromatin ◽  
Muscle Area ◽  
Scrotal Circumference ◽  
Testicular Weight ◽  
Fat Thickness ◽  
Beef Bulls

Sixty-six Angus bulls, averaging 7 mo of age and 282 kg were utilized to study the effects of implants on performance, carcass characteristics and reproductive function of intact males. Bulls were randomly assigned to one of four treatments, nonimplanted (N), 36 mg of Ralgro® (R), 220 mg of Synovex-S® (S) or 24 mg of Compudose® (C). Bulls remained on test for 217 d. Blood samples were analyzed for testosterone, growth hormone (GH) and luteinizing hormone (LH). Nonimplanted bulls had larger (P < 0.05) final scrotal circumference (39.0 vs. 37.7 cm) than S-implanted bulls, but were not different from R (38.8 cm) or C (38.6 cm) bulls. No differences were detected in sperm chromatin structure among treatment groups as determined by flow cytometry. There were no treatment differences in average daily gain, feed per gain, testicular weight, and testosterone or LH levels. Synovex implanted bulls had higher GH levels (P < 0.05) compared to N bulls, but were not different from C or R groups. Carcasses from C (331 kg) and S (332 kg) were heavier (P < 0.05) than those from R (307 kg) but not different from N (318 kg) animals. Fat thickness at the 12th rib was greater (P < 0.01) for S (11.6 mm) than N (9.0 mm), C (8.8 mm) and R (8.3 mm) treatments. The greater fat thickness of S bulls increased the yield grade compared to N and C (P < 0.05) and R-treated bulls (P < 0.01). Dressing percent was higher (P < 0.05) for C (63.2%) and S (62.6%) than R (61.7%) and N (61.0%) groups. No differences were detected for longissimus muscle area or USDA quality grades. Key words: Implants, beef bulls, sperm chromatin structure, carcass, hormones

scholarly journals Effects of distillers dried grains with solubles supplementation on yearling heifers grazing Northern Great Plains rangeland: impacts on subsequent feedlot performance and meat quality1

2019 ◽  
Vol 3 (4) ◽  
pp. 1153-1161
Author(s):  
Quynn P Larson ◽  
Robert J Maddock ◽  
Bryan W Neville
Keyword(s):  
Great Plains ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Northern Great Plains ◽  
Feedlot Performance ◽  
Muscle Area ◽  
Distillers Dried Grains ◽  
Randomized Design ◽  
Fat Thickness ◽  
Strip Loin

Abstract Eighty-two yearling crossbred heifers (318.8 ± 1.03 kg) were utilized in a completely randomized design to evaluate the effects of distillers dried grains with solubles (DDGS) supplementation on animal performance, while grazing on rangeland of the Northern Great Plains, and subsequent feedlot performance, carcass characteristics, and meat quality traits. Treatments were: 1) 0% DDGS supplementation (CONT) and 2) 0.6% of body weight (BW) DDGS supplementation (SUP). Heifers received treatments for 70 d (6 June to 16 August) while grazing, and then were acclimated to and fed a common corn-based finishing diet for 109 d. Average daily gain (ADG) of SUP heifers was greater (P ≤ 0.01), resulting in heavier BW (P ≤ 0.03) following grazing compared with CONT heifers. Heifer performance, including ADG (1.91 ± 0.05 kg/d), gain to feed (G:F) (0.15 ± 0.003 kg), dry matter intake (DMI) (12.6 ± 0.20 kg), and final BW (572.4 ± 7.43 kg) were not different (P ≥ 0.13) during finishing. Hot carcass weight (335.7 ± 4.39 kg), Longissimus muscle area (81.30 ± 1.24 cm2), 12th rib fat thickness (1.24 ± 0.06 cm), and kidney, pelvic, heart fat (KPH) (1.85 ± 0.08%) were not different (P ≥ 0.47) between treatments. There were no differences (P ≥ 0.24) between treatments in yield grade (2.9 ± 0.10) or marbling (492 ± 22.3; Small00 = 400). Results from Warner–Bratzler shear force indicated that strip loin steaks from SUP heifers tended (P = 0.07) to have increased tenderness compared with strip loin steaks from CONT heifers (3.3 vs. 3.7 ± 0.12 kg, respectively). Inclusion of 0.6% BW supplementation during grazing increased (P = 0.01) strip loin steak muscle lightness (L*) compared with CONT steaks (46.5 vs. 45.5 ± 0.27, respectively). Strip loin steaks from heifers supplemented DDGS during grazing were perceived to be more tender by taste panelists (P = 0.02) than strip loin steaks from CONT heifers (5.9 vs. 5.5 ± 0.11; eight-point scale). Supplementation of DDGS during grazing improved ADG of yearling heifers with no effect on feedlot performance or carcass characteristics but did improve tenderness and steak sensory attributes.

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).

scholarly journals Effect of monensin sodium associative to virginiamycin and/or essential oils on the performance of feedlot finished steers

2018 ◽  
Vol 39 (1) ◽  
pp. 261
Author(s):  
Julio Cezar Heker Junior ◽  
Mikael Neumann ◽  
Robson Kyoshi Ueno ◽  
Margarete Kimie Falbo ◽  
Sandra Galbeiro ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Feeding Behavior ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Average Weight ◽  
Apparent Digestibility ◽  
Fat Thickness

The objective of this study was to evaluate the associative effect of monensin sodium to virginiamycin and/or essential oils on performance, consumption of nutrients and dry matter, apparent digestibility, feeding behavior and carcass characteristics of feedlot finished steers. The experiment lasted 106 days with 10 days of adaptation and 96-day trial, and had 32 crosses angus steers, average age 12 months and average weight of 376 kg, divided into 16 stalls, the weighing took place every 21 days and at the end of the experiment. The treatments consisted of the combination of the following additives to the diet included: Monensin sodium, 200 mg day-1 (MO); Monensin sodium, a dose of 200 mg day-1 + essential oil dose of 1.5g day-1 (MO+EO); Monensin sodium, a dose of 200 mg day-1 + virginiamycin, 200 mg day-1 (MO+VI); Monensin sodium, 200 mg day-1 + essential oil dose of 1.5g day-1 + virginiamycin day, 200 mg day-1 (MO+EO+VI), each treatment had four repetitions, where each repetitions consisted of a bay with two animals. The MO+VI association in relation to MO only increase in average daily gain (ADG) of 24.44%, 22.35%, 21.10% and 17.31% in weighing 42, 63, 84 and 96 days, similar the combination of MO+EO+VI which provided an improvement of 21.94%, 13.59%, 15.45% and 14.75% respectively in the same weightings. The daily carcass gain and carcass overall gain were higher in associations MO+VI and MO+EO+VI and provided an average gain of 16.67 kg more compared to MO and MO+EO. In the parameters feed efficiency, dry matter intake and nutrient expressed in kg day-1 and percentage of live weight were not observed differences (P > 0.05) between treatments. Data on apparent digestibility, feeding behavior and carcass characteristics did not show statistical difference between treatment, except for fat thickness which was higher when associated with any of the additives to the MO, and farm weight was higher in associations containing VI. Associating MO+VI or MO+EO+VI proved to be best in this work compared to MO+EO or only MO in the diets of steers in termination.

scholarly journals Triticale silage replaces sorghum silage in finishing of Braford heifers

2021 ◽  
Vol 73 (5) ◽  
pp. 1180-1186
Author(s):  
A.M. Oliveira ◽  
L.D.F. Silva ◽  
A.P.O. Souza ◽  
E.L.A. Ribeiro ◽  
C.C. Jobim ◽  
...  
Keyword(s):  
Feed Intake ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Feed Ratio ◽  
Beef Heifers ◽  
Fat Thickness ◽  
Sorghum Silage ◽  
Experimental Treatments ◽  
Daily Gain

ABSTRACT The aim of this study was to evaluate the effect of sorghum silage substitution with different proportions of triticale silage on the performance and carcass of Braford heifers. Twenty-four Braford heifers were randomly assigned to four diets where sorghum silage was replaced at 0%, 30%, 60%, and 100% for triticale silage in a feedlot system. During sixty-tree days of the experiment, the feed intake, feed ratio conversion, and average daily gain were measured. The heifers were slaughtered and the effects of the sorghum and triticale silage in carcass characteristics were evaluated. The replacement of sorghum silage with triticale silage did not affect the feed intake and average daily gain (P> 0.05). Feed gain ratio was higher for the heifers that received lower proportions of triticale silage (0% and 30%) in replace sorghum silage (P <0.05). Eye loin area and fat thickness were similar among treatments (P<0.05). Other carcass characteristics, such as slaughter live weight, dressing percentage, conformation and fat classification were similar among experimental treatments (P<0.005). Triticale silage can replace sorghum silage for finishing beef heifers in feedlot system and provides similar carcass characteristics.

scholarly journals Effect of crude protein content and undegraded intake protein level on productivity, blood metabolites, carcass characteristics, and production economics of Hanwoo steers

2020 ◽  
Vol 33 (10) ◽  
pp. 1599-1609
Author(s):  
Youn Hee Lee ◽  
Farhad Ahmadi ◽  
Myun Lee ◽  
Young-Kyoon Oh ◽  
Wan Sup Kwak
Keyword(s):  
Growth Performance ◽  
Crude Protein ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Blood Cholesterol ◽  
Blood Metabolites ◽  
Carcass Quality ◽  
Production Economics ◽  
Muscle Area ◽  
Feeding Diets

Objective: This study was designed to determine how feeding diets differing in crude protein (CP) and undegraded intake protein (UIP) levels affected productivity, blood metabolites, carcass characteristics, and the production economics of Hanwoo steers.Methods: Thirty-six Hanwoo steers (age = 8.2±0.5 mo; body weight = 254±16.1 kg) were assigned at random to one of three treatments (4 steers/pen; 3 pens/treatment): i) a low-CP diet (LP; control) containing 12.1% CP with 35.1% UIP, 12.0% CP with 36.8% UIP, and 12.9% CP with 48.8% UIP, in the growing, fattening, and finishing periods, respectively; ii) a high-CP, low-UIP diet (HPLU) containing 15.0% CP with 33.7% UIP, 14.0% CP with 35.7% UIP, and 13.1% CP with 46.7% UIP, respectively; and iii) a high-CP, high-UIP diet (HPHU) containing 15.0% CP with 45.8% UIP, 14.0% CP with 44.6% UIP, and 13.0% CP with 51.1% UIP, respectively.Results: The treatments did not affect feed intake and growth performance, except for average daily gain during the fattening period that tended to be the lowest (p = 0.08) in the HPLUfed steers. The feed CP conversion ratio over the entire feeding period was higher with high-CP diets. The treatments did not affect most blood metabolites; however, blood cholesterol and low-density lipoprotein concentrations during the fattening and finishing periods were the lowest in steers fed a HPLU diet. The treatments had negligible effects on cold carcass weight, yield traits including longissimus muscle area, backfat thickness, yield index, and yield grade, plus quality traits including meat color, fat color, texture, and maturity. However, marbling score and frequency of carcass quality grade 1++ were greater in HPHU-fed steers.Conclusion: Feeding diets with higher CP and UIP levels did not affect growth performance but tended to improve the carcass quality of Hanwoo steers, resulting in greater economic return.

scholarly journals Effects of zilpaterol hydrochloride and zinc methionine on growth performance and carcass characteristics of beef bulls

2015 ◽  
Vol 95 (4) ◽  
pp. 609-615 ◽  
Author(s):  
Miguel A. Rodríguez-Gaxiola ◽  
Ignacio A. Domínguez-Vara ◽  
Rubén Barajas-Cruz ◽  
María A. Mariezcurrema-Berasain ◽  
José L. Bórquez-Gastelum ◽  
...  
Keyword(s):  
Growth Performance ◽  
Crude Protein ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Backfat Thickness ◽  
Longissimus Dorsi ◽  
Carcass Yield ◽  
Zilpaterol Hydrochloride ◽  
Zinc Methionine ◽  
Beef Bulls

Rodríguez-Gaxiola, M. A., Domínguez-Vara, I. A., Barajas-Cruz, R., Mariezcurrema-Berasain, M. A., Bórquez-Gastelum, J. L. and Cervantes-Pacheco, B. J. 2015. Effects of zilpaterol hydrochloride and zinc methionine on growth performance and carcass characteristics of beef bulls. Can. J. Anim. Sci. 95: 609–615. Sixty beef bulls with a body weight (BW) of 314.7±16.2 kg were used to evaluate the effects of zilpaterol hydrochloride (ZH) and zinc methionine (ZM) on growth performance and carcass characteristics. The experimental design was a randomized complete block, with a factorial 2×2 arrangement of treatments (ZH: 0 and 0.15 mg kg−1 BW; ZM: 0 and 80 mg kg−1 dry matter). The ZH increased (P<0.05) the final BW, average daily gain, feed conversion, carcass yield and longissimus dorsi area. Bulls fed ZH plus ZM had less (P<0.01) backfat thickness and intramuscular fat (IMF) compared with those fed ZH or ZM alone. The ZH increased (P<0.02) the meat crude protein content and cooking loss. It is therefore concluded that ZH increases growth performance, carcass yield, longissimus dorsi area, and meat crude protein. The interaction of ZM and ZH did not present additional advantages. The reason for the reduction in backfat thickness and IMF by ZH plus ZM is unclear, and implies that our knowledge of β-agonistic adrenergic substances and their interactions with minerals is incomplete.

Growth and carcass characteristics of Wagyu-sired steers at heavy market weights following slow or rapid growth to weaning

2006 ◽  
Vol 46 (7) ◽  
pp. 951 ◽  
Author(s):  
L. M. Cafe ◽  
H. Hearnshaw ◽  
D. W. Hennessy ◽  
P. L. Greenwood
Keyword(s):  
Growth Rates ◽  
Rapid Growth ◽  
Slow Growth ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Carcass Weight ◽  
Muscle Area ◽  
Eye Muscle ◽  
Similar Composition ◽  
Daily Gain

Two groups of Wagyu × Hereford steers grown slowly (slow preweaning group, n = 14, mean average daily gain = 631 g/day) or rapidly (rapid preweaning group, n = 15, mean average daily gain = 979 g/day) from birth to weaning were backgrounded on improved, temperate pasture to equivalent group liveweights (543 v. 548 kg, s.e. = 8.8 kg), then finished in a feedlot for 120 days. At weaning, the slow preweaning group was 79 kg lighter than the rapid preweaning group. They required an additional 43 days of backgrounding to reach the same feedlot entry weight as the rapid preweaning group. The slow preweaning group grew more rapidly during backgrounding (630 v. 549 g/day, s.e. = 13.7 g/day) but tended to grow more slowly during feedlotting (1798 v. 1982 g/day, s.e. = 74.9 g/day) than their rapid preweaning counterparts, with overall growth rates from weaning to feedlot exit not differing between the 2 groups (rapid 763 g/day v. slow 772 g/day, s.e. = 17.5 g/day). At slaughter, following the feedlot phase, carcass weights of the 2 groups did not differ significantly (rapid 430 kg v. slow 417 kg, s.e. = 7.2 kg). There was a tendency for the steers grown slowly to weaning to have a higher dressing percentage (57.6 v. 56.6%, s.e. = 0.33%), but there were no significant differences in carcass compositional characteristics between the 2 groups. The slow preweaning steers did have a greater eye muscle area than the rapid preweaning steers (106.6 v. 98.9 cm2, s.e. = 1.87) when carcass weight was used as a covariate. These findings demonstrate that cattle grown slowly to weaning have similar composition at slaughter as those grown rapidly during the same period when backgrounded on pasture to the same feedlot entry weight. Furthermore, marbling was not adversely affected by slow growth to weaning.

Growth and carcass characteristics of crossbred and straightbred Hereford steers. II. Carcass measurements and composition

1981 ◽  
Vol 32 (1) ◽  
pp. 171 ◽  
Author(s):  
JM Thompson ◽  
R Barlow
Keyword(s):  
Subcutaneous Fat ◽  
Carcass Characteristics ◽  
Allometric Equation ◽  
The Body ◽  
The Other ◽  
Carcass Weight ◽  
Muscle Area ◽  
Eye Muscle ◽  
Fat Thickness ◽  
Breed Crosses

The effect of sire breed on the growth and development of carcass characteristics was examined in 104 steer carcasses, over the weight range of c. 300 to 600 kg liveweight. The carcasses were obtained from 28 straightbred Hereford, 27 Brahman x Hereford, 23 Simmental x Hereford and 26 Friesian x Hereford steers, which were grown on pasture and slaughtered in four groups when the Herefords weighed c. 270, 370, 470 and 570 kg liveweight. Changes in carcass characteristics with weight were examined by using the linear form of the allometric equation (log10Y = log10A+blog10X). As liveweight increased, the proportion of carcass in the body increased (b = 1.152). At the same liveweight, Brahman cross steers had heavier carcasses than the Hereford steers, which were heavier than either the Simmental or Friesian cross steers (P < 0.05). Fat thickness at the 12th-13th rib site, and kidney and channel fat weight both increased at a proportionally faster rate than carcass weight (b = 1.511 and 1 567 respectively). At the same carcass weight, Hereford and Brahman cross carcasses had a greater fat thickness than Simmental and Friesian cross carcasses (P i 0.05). Differences between sire breeds in kidney and channel fat weight were not significant (P > 0.05). C:rcass length and eye muscle area increased at a proportionally slower rate than carcass weight (b = 0.268 and 0.466 respectively). At the same carcass weight, Friesian cross carcasses were longer, and Simmental cross carcasses had a larger eye muscle area than the other breed crosses (P < 0.05). As total side weight increased, the proportions of subcutaneous and intermuscular fatAincreased (b = 1.554 and 1.535 respectively), and the proportions of muscle and bone decreased (b = 0.938 and 0.676 respectively). At the same side weight, the Hereford and Brahman cross carcasses had more subcutaneous fat than the Simmental and Friesian cross carcasses (P < 0.05). The Hereford carcasses had more intermuscular fat than the Simmental cross carcasses, which had more muscle than the other breed crosses (P < 0.05). Friesian cross carcasses had more bone than the Simmental crosses, with Brahman cross and Hereford carcasses having the least bone (P < 0.05). Brahman cross carcasses had a higher conformation score than the Simmental cross and Hereford carcasses, the Friesian cross carcasses having the lowest (P < 0.05). Samples of the M. longissimus from Brahman cross carcasses had a higher Warner-Bratzler shear force than samples from the other breed crosses (P < 0.05).

ULTRASONIC MEASUREMENTS OF BEEF BULLS IN PERFORMANCE-TESTING PROGRAMS

1973 ◽  
Vol 53 (4) ◽  
pp. 629-636 ◽  
Author(s):  
J. W. WILTON ◽  
T. D. BURGESS ◽  
T. R. BATRA
Keyword(s):  
Performance Test ◽  
Performance Testing ◽  
Longissimus Muscle ◽  
Muscle Area ◽  
A Value ◽  
Ultrasonic Measurements ◽  
Partial Correlations ◽  
Fat Thickness ◽  
Beef Bulls ◽  
Thickness Measurements

Fat thickness and longissimus muscle area were measured ultrasonically on 229 beef bulls on performance test. Charolais bulls were leaner than Hereford and Angus at both start and end of test and grew more quickly. Rate of gain on test was not related to initial age, weight or fat thickness, with partial correlations of.00,.22, and −.01, respectively, for Charolais, and.08,.06, and −.05, respectively, for Hereford. Rate of gain on test was not highly related to final fat thickness and longissimus muscle area nor to changes in fatness and muscle area during test, correlations with rate of gain being.14,.21,.06, and.02, respectively, for Charolais, and.15,.23,.22, and.12 for Hereford. Predicted retail yield gains per day on test were very closely related to liveweight gains on test, with correlations of.99 for both Charolais and Hereford. Fat thickness measurements do not appear to have any value if used to predict retail yield per day, but might have a value in identifying beef bulls that exceed acceptable fat thickness by the end of test.

scholarly journals Effect of feeding dry-rolled corn or whole shelled corn during the finishing phase on growth performance and carcass characteristics

2020 ◽  
Author(s):  
T B Freitas ◽  
T L Felix ◽  
C Clark ◽  
F L Fluharty ◽  
A E Relling
Keyword(s):  
Growth Performance ◽  
Feed Efficiency ◽  
Dry Matter ◽  
Block Design ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Feedlot Cattle ◽  
Carcass Weight ◽  
Muscle Area ◽  
Quality Grade

Abstract The objectives of this trial were to evaluate the effect of corn processing during the finishing phase on feedlot cattle performance and carcass characteristics. We hypothesized that steers fed dry-rolled corn would have better feed efficiency (less feed necessary to the same amount of gain) than steers fed whole shelled corn. Ninety-five backgrounded Angus-cross cattle, (initial body weight (BW) = 263 ± 9.8 kg) were used in a randomized complete block design in a feedlot setting. Cattle were divided in to 3 blocks: heifers (n = 31, 4 pens; initial BW = 267 ± 1.3 kg), light steers (n = 32, 4 pens; initial BW = 253 ± 1.3 kg), and heavy steers (n = 32, 4 pens; initial BW = 279 ± 1.4 kg). Diets contained 70% corn (experimental treatment), 15% dried distiller’s grains with solubles, 7% grass hay, and 8% supplement, on a dry matter basis. Cattle were fed for 217, 224, and 231 ± 8 d for the heifer, heavy steer, and light steer blocks, respectively. Two pens within each block were randomly assigned to one of the following treatments: 1) dry-rolled corn (DRC) or 2) whole shelled corn (WSC). Animal growth performance and carcass characteristics were analyzed using the MIXED procedure of SAS, including the fixed effect of treatment. Pen and block were included as random effects. Carcass characteristics USDA Yield Grade and Quality Grade distributions were compared using the GLIMMIX procedure of using the same model than the growth performance data. Data are presented as LSMeans. Cattle fed DRC had greater average daily gain (ADG; P = 0.02) and final BW (P &lt; 0.01) when compared with cattle fed WSC. Even though ADG was greater for the DRC treatment, feed efficiency was similar (P = 0.45) because dry matter intake (DMI) was also greater (P = 0.04) for DRC when compared with the WSC treatment. Cattle fed DRC also had greater hot carcass weight (P &lt; 0.01), dressing percentage (P &lt; 0.01), and Longissimus dorsi muscle area (LMA; P &lt; 0.01) than cattle fed WSC. No differences (P ≥ 0.18) were observed for marbling score, USDA Yield Grade or USDA Quality Grade. In conclusion, feeding DRC to feedlot cattle improved ADG, hot carcass weight, and LMA, without affecting feed efficiency or meat quality.

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