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Pouzo LB, Ceconi I, Davies P, Méndez D, Ortiz Miranda SG, Testa ML, Pavan E. Animal performance and meat quality characteristics from feedlot-finished steers fed increasing levels of wet distillers grain. Meat Sci 2023; 204:109214. [PMID: 37285637 DOI: 10.1016/j.meatsci.2023.109214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 04/21/2023] [Accepted: 04/29/2023] [Indexed: 06/09/2023]
Abstract
One hundred forty-four steers were group-housed in 24 pens that were randomly assigned to one of four dietary treatments defined by the proportion of wet distiller grain plus solubles (WDGS; 0, 15, 30, or 45%) and fed for 84 d pre-slaughter. Animal performance was evaluated using the pen as the experimental unit. Whereas for carcass and meat quality characteristics, meat oxidative stability, and the consumer sensory quality of longissimus thoracis muscle one animal from each pen was randomly selected and used as the experimental unit. No differences (P > 0.05) were observed for subcutaneous fat thickness, rib eye area, marbling score or pH, color parameters, proximate composition, sarcomere length, Warner Bratzler shear force, and cooking loss. Feeding WDGS linearly increased total PUFA (P = 0.05), C18:2 n-6 (P = 0.004) proportions, and n-6/n-3 ratio (P < 0.01) but reduced C16:1 to C18:0 ratio (P < 0.01). Lipid oxidation was greater in beef from steers fed 30% and 45% WDGS (P = 0.05). Dietary WDGS linearly improved (P < 0.05) flavor and overall linking score in the consumer sensory panel.
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Affiliation(s)
- L B Pouzo
- Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria Balcarce, Balcarce, Bs. As., Argentina; Universidad Nacional de Mar del Plata, Facultad de Ciencias Agrarias, Balcarce, Bs. As., Argentina
| | - I Ceconi
- Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria Gral, Villegas, Gral. Villegas, Bs. As., Argentina
| | - P Davies
- Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria Gral, Villegas, Gral. Villegas, Bs. As., Argentina
| | - D Méndez
- Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria Gral, Villegas, Gral. Villegas, Bs. As., Argentina
| | - S G Ortiz Miranda
- Universidad Nacional de Mar del Plata, Facultad de Ciencias Agrarias, Balcarce, Bs. As., Argentina
| | - M L Testa
- Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria Balcarce, Balcarce, Bs. As., Argentina
| | - E Pavan
- Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria Balcarce, Balcarce, Bs. As., Argentina; Universidad Nacional de Mar del Plata, Facultad de Ciencias Agrarias, Balcarce, Bs. As., Argentina; Clemson University, Department of Animal and Veterinary Science, Clemson, SC, United States of America.
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Yang C, Wu L, Guo Y, Li Y, Deng M, Liu D, Liu G, Sun B. Expression profile and bioinformatics analysis of circRNA and its associated ceRNA networks in longissimus dorsi from Lufeng cattle and Leiqiong cattle. BMC Genomics 2023; 24:499. [PMID: 37644462 PMCID: PMC10466722 DOI: 10.1186/s12864-023-09566-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 08/08/2023] [Indexed: 08/31/2023] Open
Abstract
This paper aims to explore the role of circRNA expression profiles and circRNA-associated ceRNA networks in the regulation of myogenesis in the longissimus dorsi of cattle breeds surviving under subtropical conditions in southern China by RNA sequencing and bioinformatics analysis. It also aims to provide comprehensive understanding of the differences in muscle fibers in subtropical cattle breeds and to expand the knowledge of the molecular networks that regulate myogenesis. With regard to meat quality indicators, results showed that the longissimus dorsi of LQC had lower pH (P < 0.0001), lower redness (P < 0.01), lower shear force (P < 0.05), and higher brightness (P < 0.05) than the longissimus dorsi of LFC. With regard to muscle fiber characteristics, the longissimus dorsi of LQC had a smaller diameter (P < 0.0001) and higher density of muscle fibers (P < 0.05). The analysis results show that the function of many circRNA-targeted mRNAs was related to myogenesis and metabolic regulation. Furthermore, in the analysis of the function of circRNA source genes, we hypothesized that btacirc_00497 and btacirc_034497 may regulate the function and type of myofibrils by affecting the expression of MYH6, MYH7, and NEB through competitive linear splicing.
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Affiliation(s)
- Chuang Yang
- College of Animal Science, South China Agricultural University, No.483 Wushan Road, Guangzhou, 510642, China
| | - Longfei Wu
- College of Animal Science, South China Agricultural University, No.483 Wushan Road, Guangzhou, 510642, China
| | - Yongqing Guo
- College of Animal Science, South China Agricultural University, No.483 Wushan Road, Guangzhou, 510642, China
| | - Yaokun Li
- College of Animal Science, South China Agricultural University, No.483 Wushan Road, Guangzhou, 510642, China
| | - Ming Deng
- College of Animal Science, South China Agricultural University, No.483 Wushan Road, Guangzhou, 510642, China
| | - Dewu Liu
- College of Animal Science, South China Agricultural University, No.483 Wushan Road, Guangzhou, 510642, China
| | - Guangbin Liu
- College of Animal Science, South China Agricultural University, No.483 Wushan Road, Guangzhou, 510642, China.
| | - Baoli Sun
- College of Animal Science, South China Agricultural University, No.483 Wushan Road, Guangzhou, 510642, China.
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Mushi DE. Feedlot performance of Tanzanian Shorthorn Zebu finished on local feed resources. Trop Anim Health Prod 2020; 52:3207-3216. [PMID: 32638154 DOI: 10.1007/s11250-020-02346-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 07/02/2020] [Indexed: 11/24/2022]
Abstract
A study was conducted in Hanang District to assess potential for on-farm feedlot finishing of Tanzanian Shorthorn Zebu (TSHZ) in dry season using locally available feed resources. A total of 65 (2-3 years old, 150-250 kg LWT) steers were randomly distributed into two dietary treatments in three villages. The steers were finished either in feedlots using compounded diets or under free grazing in accordance with farmers' practice. Following 90 days of feeding, all steers were slaughtered for detailed carcass and meat quality assessment. Growth performance, carcass and meat quality of experimental animals were assessed to determine feedlot performance of TSHZ. Results show that average daily gain of feedlot-finished animals (620 g/day) was nearly three-fold higher (P = 0.042) than that of grazed steers (223 g/day). Feedlot-finished steers produced 28 kg (P = 0.001) heavier carcasses than grazed ones. Carcasses from feedlot-finished steers cooled slowly as they had higher (P = 0.001) temperatures than that of grazed ones at 45 min (33.1 vs. 30.5 °C) and 6 h (21.0 vs. 19.5 °C) post-mortem. Feedlot-finished steers produced beef with higher (P = 0.003) marbling scores (3.4) than grazed ones (2.4). As a result, beef from the feedlot-finished steers was more tender (P = 0.016) than that from grazed ones, and it required 13 N less force to shear. It is concluded that TSHZ responds positively to improved feeding with significant enhancement on carcass gain and meat quality. Use of diets compounded using agro-processing by-products, instead of whole grain, can lower the cost of finishing TSHZ steers significantly.
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Affiliation(s)
- D E Mushi
- Department of Animal, aquaculture and Range Sciences, Sokoine University of Agriculture, Morogoro, Tanzania.
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