scholarly journals PSVI-7 Effects of feeding chromium- and zinc- amino acid complexes on growth performance and carcass characteristics of finishing bulls fed zilpaterol hydrochloride for the last 30 days in the feedlot

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 434-435
Author(s):  
Ruben Barajas ◽  
Billy J J Cervantes ◽  
Mark E Branine ◽  
Connie K Larson ◽  
Alejandro Ramos-Suarez
Keyword(s):  
Amino Acid ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Biological Response ◽  
Carcass Composition ◽  
Energetic Efficiency ◽  
Level Control ◽  
Zilpaterol Hydrochloride ◽  
Primary Driver ◽  
Eden Prairie

Abstract A 2 x 2 factorial study was conducted to evaluate main and interaction effects of feeding amino acid complexed sources of Zn (Zn-AAC; 40 mg /kg DM from Availa® Zn; Zinpro Corp., Eden Prairie, MN) and Cr (chromium methionine; Cr-Met; 0.20 mg / kg DM from Availa® Cr; Zinpro Corp., Eden Prairie, MN) fed in combination or separately, compared to an iso-Zn level Control (CON) group that provided Zn from ZnSO4 (80 mg Zn∙kg-1DM) with no supplemental source of Cr. Treatments were replicated into 4 pens with 5 finishing Bos taurus x Bos indicus bullocks/pen (80 bullocks; BW= 421 kg). Treatment diets were initiated 28 d prior to starting zilpaterol hydrochloride (ZIL; 15 mg/kg BW) with ZIL fed daily for 33 d followed by a 4 d withdrawal before harvest. During the ZIL-feeding Zn-ACC x Cr-Met interactions were present for ADG and Gain:Feed (G:F) where Zn-ACC improved ADG (P≤ 0.05) and Cr-Met improved G:F vs. CON. Effects may have been mediated by differences in DM intake (DMI), where DMI was numerically increased by Zn-ACC and decreased (P ≤ 0.01) by Cr-Met. Overall, feeding Cr-Met moderated DMI and improved G:F (P ≤ 0.05). Measures of carcass composition were not affected by Zn-ACC or Cr-Met. Hot carcass weight was increased (P ≤ 0.05) by feeding Zn-ACC and tended to increase with Cr-Met. Daily carcass gain increased from feeding either Zn-ACC or Cr-Met during the ZIL phase and overall study. Feeding Zn-ACC was a primary driver during the ZIL period and overall trial for increasing growth rate, with little or no influence on DM intake while feeding Cr-Met moderated DM intake to improve dietary and energetic efficiency. Balancing the feeding levels of Zn-ACC and Cr-Met will be key to optimizing the overall biological response and net return.

Genotype differences and their impact on digestive tract function of ruminants: a review

2004 ◽  
Vol 44 (5) ◽  
pp. 459 ◽  
Author(s):  
R. S. Hegarty
Keyword(s):  
Fatty Acid ◽  
Retention Time ◽  
Bos Taurus ◽  
Energy Requirement ◽  
Bos Indicus ◽  
Energetic Efficiency ◽  
Physiological Factors ◽  
Rumen Microorganisms ◽  
Digestive Function ◽  
Tract Function

Physiological factors that cause between-animal variation in digestive function were evaluated as possible selection traits to achieve improved growth and feed-use efficiency by ruminants. Comparative studies of the digestive function of Bos taurus and Bos indicus cattle, as well as selection lines of dairy cows and sheep were reviewed to determine the scope and significance of diversity in rumen function. All investigations indicated differences in digesta retention time between genotypes. Therefore, the digesta retention time, either the total mean retention time (MRT) or the ruminal retention time (RRT), may be suitable selection traits for improving animal productivity.Differences in MRT and RRT may affect animal productivity by changing the number and diversity of rumen microorganisms, the volatile fatty acid (VFA) pattern, the composition and maintenance energy requirement of the microbes, and thus the energetic efficiency of microbial growth. Further effects associated with changed RRT include a possible reduction in methane production and increased long-chain fatty acid (LCFA) synthesis in the rumen, which may consequently affect the energetic efficiency of the ruminant. It is concluded that despite strong evidence of genetic diversity in gut function, the central role of MRT and RRT in digestive metabolism has not been fully appreciated, nor have their contribution to productivity differences among livestock of similar or divergent genotypes been adequately investigated.

scholarly journals Energetic efficiency of protein and body fat retention in crossbred Bos indicus and Bos Taurus × Bos indicus raised under tropical conditions

2009 ◽  
Vol 38 (8) ◽  
pp. 1581-1586
Author(s):  
Douglas Sampaio Henrique ◽  
César de Queiroz ◽  
Ricardo Augusto Mendonça Vieira ◽  
Mosar Faria Botelho
Keyword(s):  
Body Fat ◽  
Correction Factor ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Metabolizable Energy ◽  
Energetic Efficiency ◽  
Energy Fraction ◽  
Protein Retention ◽  
Tropical Conditions ◽  
Partial Body

The efficiency of fat and protein retention by Bos indicus and its cross-breds was estimated from data obtained in the literature to verify possible differences between these animals and Bos taurus. After estimating the efficiencies, a correction factor was used to discount the metabolizable energy fraction that was spent in the maintenance and support metabolism processes. The efficiencies were then estimated again, assuming that all the remaining energy would correspond to the metabolizable energy available for body mass retention. The correction value used was considered satisfactory to discount energetic losses for maintenance and support. The efficiency values of partial body fat and protein retention in Bos indicus and its cross-bred were very similar to values reported by other authors who researched Bos taurus exclusively.

scholarly journals Frequencies of candidate genes and associations with carcass and meat traits in Nellore and crossbred cattle

2016 ◽  
Vol 51 (2) ◽  
pp. 169-176 ◽  
Author(s):  
Victor Augusto Domingos Dias ◽  
Rogério Abdallah Curi ◽  
Guilherme Luis Pereira ◽  
Jéssica Moraes Malheiros ◽  
Rafael Espigolan ◽  
...  
Keyword(s):  
Meat Quality ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Carcass Composition ◽  
Orphan Receptor ◽  
Quality Data ◽  
Nucleotide Polymorphisms ◽  
Allelic Frequencies ◽  
Fragmentation Index ◽  
Melanin Concentrating Hormone

Abstract: The objective of this work was to estimate allelic frequencies of the polymorphisms IGF2/MboII (G > T) of the insulin-like growth factor 2 (IGF2) gene, DQ499531.1:g.134A > T of the pro-melanin-concentrating hormone (PMCH) gene, and DQ667048.1:g.3290G > T of the RARrelated orphan receptor C (RORC) gene in beef cattle of different genetic groups, and to evaluate the associations between these polymorphisms and traits related to carcass composition and meat quality. Data on carcass and meat quality of 499 animals was used: of 313 Nellore (Bos indicus) and of 186 Nellore crossed with different taurine (Bos taurus) breeds. For the IGF2/MboII polymorphism, the frequencies found for the G allele were 0.231 and 0.631 for Nellore and crossed breeds, respectively. For the DQ499531.1:g.134A > T polymorphism, the allelic frequencies of A were 0.850 for Nellore and 0.905 for crossed breeds. For the DQ667048.1:g.3290G > T polymorphism, the allelic frequencies of G were 0.797 and 0.460 for Nellore and crossed breeds, respectively. The evaluated single nucleotide polymorphisms (SNPs) are not significantly associated with carcass and meat traits (rib eye area, back fat thickness, shear force, total lipids, and myofibrillar fragmentation index), suggesting little utility of the analyzed polymorphisms of the IGF2, PMHC, and RORC genes as selection markers in the studied cattle populations.

scholarly journals Genome-wide identification of cyclin-dependent kinase (CDK) genes affecting adipocyte differentiation in cattle

BMC Genomics ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Cuili Pan ◽  
Zhaoxiong Lei ◽  
Shuzhe Wang ◽  
Xingping Wang ◽  
Dawei Wei ◽  
...  
Keyword(s):  
Gene Family ◽  
Expression Analysis ◽  
Adipocyte Differentiation ◽  
Bos Taurus ◽  
Adipogenic Differentiation ◽  
Critical Role ◽  
Bos Indicus ◽  
Specific Expression ◽  
Genome Wide ◽  
A Genome

Abstract Background Cyclin-dependent kinases (CDKs) are protein kinases regulating important cellular processes such as cell cycle and transcription. Many CDK genes also play a critical role during adipogenic differentiation, but the role of CDK gene family in regulating bovine adipocyte differentiation has not been studied. Therefore, the present study aims to characterize the CDK gene family in bovine and study their expression pattern during adipocyte differentiation. Results We performed a genome-wide analysis and identified a number of CDK genes in several bovine species. The CDK genes were classified into 8 subfamilies through phylogenetic analysis. We found that 25 bovine CDK genes were distributed in 16 different chromosomes. Collinearity analysis revealed that the CDK gene family in Bos taurus is homologous with Bos indicus, Hybrid-Bos taurus, Hybrid Bos indicus, Bos grunniens and Bubalus bubalis. Several CDK genes had higher expression levels in preadipocytes than in differentiated adipocytes, as shown by RNA-seq analysis and qPCR, suggesting a role in the growth of emerging lipid droplets. Conclusion In this research, 185 CDK genes were identified and grouped into eight distinct clades in Bovidae, showing extensively homology. Global expression analysis of different bovine tissues and specific expression analysis during adipocytes differentiation revealed CDK4, CDK7, CDK8, CDK9 and CDK14 may be involved in bovine adipocyte differentiation. The results provide a basis for further study to determine the roles of CDK gene family in regulating adipocyte differentiation, which is beneficial for beef quality improvement.

Expression of candidate genes for residual feed intake in tropically adapted Bos taurus and Bos indicus bulls under thermoneutral and heat stress environmental conditions

2021 ◽  
pp. 102998
Author(s):  
Bianca Vilela Pires ◽  
Nedenia Bonvino Stafuzza ◽  
Luara Afonso de Freitas ◽  
Maria Eugênia Zerlotti Mercadante ◽  
Ester Silveira Ramos ◽  
...  
Keyword(s):  
Heat Stress ◽  
Candidate Genes ◽  
Feed Intake ◽  
Environmental Conditions ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Residual Feed Intake

scholarly journals Differences in copper and selenium metabolism between Angus (Bos taurus) and Brahman (Bos indicus) cattle

2021 ◽  
Author(s):  
J Ranches ◽  
R Alves ◽  
M Vedovatto ◽  
E Anne Palmer ◽  
P Moriel ◽  
...  
Keyword(s):  
Bos Taurus ◽  
Bos Indicus ◽  
First Trimester ◽  
Beef Cows ◽  
Experimental Unit ◽  
University Of Florida ◽  
Brahman Cattle ◽  
Research And Education ◽  
The University ◽  
Se Status

Abstract A two-year study was conducted at the University of Florida – IFAS, Range Cattle Research and Education Center (Ona, FL) to evaluate differences in the metabolism of Cu and Se of Angus (Bos taurus) and Brahman (Bos indicus) cattle. Thirty-two pregnant beef cows (n = 8 Brahman and 8 Angus/year) were enrolled in the study in the first trimester of gestation. The study consisted of 3 phases: (1) restriction (d 0 to d 90); (2) supplementation (d 91 to 150), and (3) calving. During all 3 phases, cows were individually fed and housed in partially covered drylot pens. During the restriction and supplementation phases cows were provided a 1.5 kg/d of a grain-based concentrate supplement, which was fortified with flowers of S (50 g of supplemental S/cow daily; restriction phase) or Cu and Se (100 and 3 mg/d of Cu and Se, respectively; supplementation phase). Blood and liver samples were collected from all cows on 30 d intervals and from both cows and calves within 24 h of calving. Colostrum and milk samples were collected at calving and 7 d after birth. All data were analyzed using the MIXED procedure of SAS, where cow and calf were the experimental unit. During the restriction phase, a breed × day effect (P = 0.03) was observed where Brahman had greater liver Cu concentration than Angus cows in all sampling days. For liver Se concentration, a tendency (P = 0.07) for a breed effect was observed where Angus cows tended to have greater liver Se concentration than Brahman. During the supplementation phase, breed (P < 0.001) and day (P < 0.01) effects were observed, where Brahman cows had greater liver Cu concentration than Angus. For liver Se concentration, a day effect (P < 0.001) was observed, where liver Se concentration increased (P < 0.001) from d 90 to 120 and remained unchanged (P = 0.86) until d 150. At calving no effects of breed (P = 0.34) were observed for liver Cu concentration of cows, however, Brahman calves tended (P = 0.09) to have greater liver Cu concentration than Angus calves. For Se liver concentration at calving, Angus cows tended (P = 0.07) to have greater liver Se concentration than Brahman cows, however no breed differences (P = 0.70) were observed for liver Se concentration of calves at birth. In summary substantial differences in multiple indicators of Cu and Se status were observed between Angus and Brahman cattle, implying that Angus and Brahman cattle possibly have different mechanisms to maintain adequate Cu and Se status.

Chemical composition of whole body and carcass of Bos indicus and tropically adapted Bos taurus breeds

2011 ◽  
Vol 89 (9) ◽  
pp. 2859-2866 ◽  
Author(s):  
S. F. M. Bonilha ◽  
L. O. Tedeschi ◽  
I. U. Packer ◽  
A. G. Razook ◽  
R. F. Nardon ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Whole Body
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