Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 72 for “"Marbling"”.
-
Effect of Nutrition and Management on Marbling Deposition, Carcass Value, and Profitability in Feedlot Cattle
Three feedlot experiments were conducted to examine the effect of dietary vitamin A on carcass quality and serum retinol (ROL) in cattle. Diets were calculated to contain 2300 (LVA) or 7250 IU/kg (HVA). No treatment differences existed for MS across all trials. Serum ROL was greater among calf-fed …
-
The Influence of Growth Stage on Carcass Composition and Factors Associated with Marbling Development in Beef Cattle
<p>Subcutaneous fat and intramuscular fat (marbling) both increase in beef cattle during the feeding phase, but are antagonistic in regard to their contribution to beef carcass value. The objective of this study was to determine whether cellular factors associated with marbling development change …
-
Effects of early weaning on finishing feed efficiency, marbling development and retail product quality of beef steers
… of early weaning on finishing feed efficiency, marbling development and retail product quality of beef steers. In experiment I, which included 90 Angus-sired steers from four calving seasons, early weaning followed by a short ad libitum concentrate-feeding and pasture-backgrounding phase reduced …
-
Characterizing the amount and variability of intramuscular fat deposition of pork loins using barrows and gilts from two sire lines
… studies were conducted to characterize marbling variability in pigs. A total of 196 pigs (at 10 weeks of age) were raised in a 98 d growth study. Pigs were fed in a university finisher barn in pens of 4 pigs each. Equal numbers of barrows and gilts sired by boars targeting meat quality …
-
Effects of dietary fat and protein from corn coproducts on growth, carcass characteristics, ruminal metabolism, and genomic regulation of marbling development in early-weaned beef cattle
… production, and transcriptional regulation of marbling. In Exp. 1, crossbred heifers (n = 150) and steers (n = 100) were used to evaluate 1 of 5 growing diets in a 2 × 2 + 1 factorial arrangement of treatments: 1) corn-based control; 2) low fat, low protein coproduct blend; 3) high fat, low …
-
Nutritional Management Affects Feedlot Performance, Carcass Characteristics and the Relationships of Intramuscular Fat, Subcutaneous Fat, and Feed Efficiency of Normal and Early -Weaned Heifers
… and breed on the relationships of 12 th rib fat, marbling score and feed efficiency were evaluated using ultrasound technology. The data suggested that early weaning heifers and finishing them as calves resulted in more efficient gains (P ≤ 0.01) at any given marbling score and higher marbling …
-
Fat content and fatty acid composition of South African Wagyu beef
… predisposed to produce vast amounts of marbling or intramuscular fat in the beef cuts. A common misconception among consumers is that all fat in red meat is saturated and will have a negative effect on health, especially non-communicable diseases. On the contrary, red meat has many …
-
Effects of endocrine modifiers on growth, carcass characteristics, and blood and tissue metabolites of finishing beef cattle
… IU/kg DM). Final BW, G:F, ADG, HCW, LM area, marbling, and quality grade distribution did not differ among treatments. Except for d 56, no correlations between marbling score and tissue retinol concentrations or vitamin A intake were found. A negative correlation between liver retinol and …
-
The Impacts of Intramuscular Fat Content and Other Biochemical Attributes of Fresh Pork Loins on Sensory Characteristics
The effect that marbling, or intramuscular fat, has on sensory properties (tenderness, juiciness, flavor) and mechanical tenderness has been of interest with many food service and retail programs marketing high quality pork. Two trials were conducted to determine if marbling improves sensory …
-
Growth Promoting Implants and Nutrient Restriction Prior to Feeding: Effect on Carcass Composition, Carcass Quality, and Consumer Acceptability of Beef
… Cattle fed as calves had a greater (P = 0.02) marbling score than yearlings in Exp. 1, but there were no differences (P = 0.32) in marbling scores across treatments in Exp. 2. In Exp 1, IMPL cattle tended (P = 0.06) to have a lower marbling score and had reduced (P = 0.03) percentage of cattle …
-
Transcription profiles of differentially marbled beef cattle
… and CASQ2 were increased in animals with high marbling, whereas levels of NPNT, MRC1, DNER, and CYPB4 were decreased in high marbling animals. The remaining gene, ACTN2 was determined to be a false positive from the array and was therefore excluded from further study. RNA was then extracted …
-
Establishing the relationships among carcass characteristics and meat quality traits of pork
… includes loins with color scores < 2.5 and marbling scores ≤ 2.0. Medium (n = 203) quality includes color scores 2.0 through 3.5 with marbling ≥ 2.5, color scores from 3.0-3.5 with marbling scores ≥ 1.5, and color scores ≥ 4.0 with marbling scores < 1.5. High (n = 50) quality includes color …
-
Evaluation of feedlot feed efficiency relationships as well as genetic and phenotypic performance, carcass, and economic outcomes
… shown by progeny of SM dams (P < 0.05); however, marbling score was 80 units higher for progeny of AN dams (P < 0.05). The only sire by dam breed interaction was for marbling score (P = 0.05). Overall, maternal heterosis effects on performance, feed efficiency measures, and carcass traits of …
-
Effects of selection on highly heritable traits of purebred and hybrid beef cattle
… of strong genetic antagonisms (-.56) between marbling and retail product percentage, there is limited opportunity to select within breeds to achieve high levels of both these traits. Crossbreeding offers two primary advantages relative to the use of only one breed: heterosis and breed …
-
Effects of prepartum supplement level and age of weaning on dam performance and developmental programming of male progeny
… of weaning interaction occurred for ultrasound marbling score at time of normal weaning. In yr 1, marbling was decreased (P = 0.04) for EW steers compared iii to NW steers; however, in yr 2, marbling was increased (P < 0.01) for EW steers compared to NW steers. For steer progeny, dam prepartum …
-
Weaning age and source of energy influence beef cattle performance, carcass characteristics, and economics
… lower for the CON (1.2 vs. 1.1 cm, P = 0.02). Marbling score was higher for early-weaned cattle when compared to creep-fed cattle (586 vs. 500) and lower for the CON (476 vs. 543) than all other treatments (P < 0.01). Marbling score did not differ significantly when comparing source of energy. …
-
Mapping of monogenic and quantitative trait loci using a whole genome scan approach and single nucleotide polymorphism platforms
… weight, back fat, yield grade, ribeye area and marbling. There were 81 SNP associations with birth weight that were sequestered into 10 genomic regions. The carcass trait, back fat exhibited association with 209 SNPs in 46 genomic regions and yield grade displayed association with 172 SNPs in 69 …
-
Residual feed intake, breed of sire and dam, and individual sire affect performance and carcass characteristics and rates of back fat and intramuscular fat of feedlot steers
… Steers from Angus sires had higher (P = 0.0002) marbling score (MS) than steers from Simmental sires. Meat tenderness was similar (P = 0.98) between the steers from Angus or Simmental sires. Steers from Simmental dams had heavier hot carcass weight (HCW) (P = 0.01) than steers from Angus dams. …
-
Genomic selection for high quality beef production
… desired due to its propensity to accumulate marbling. Initial focus of the thesis was to investigate using genomics to breed purebred Wagyu, producing crossbreds with improved marbling performance. However, the thesis had to undergo a change in direction due to unforeseen delays in obtaining …
-
The Influence of Zeranol Implants in Bulls, Late Castrates and Steers Fed for Slaughter
… and larger ribeyes. Steers and Angus had higher marbling scores. Implanting decreased marbling and increased carcass maturity. Bulls were quieter during weighing and mounted more frequently in the pen than steers. Limousins mounted more frequently than Angus. Warner-Bratzler shear (WBS) …
Page 1 of 4