Improvement Of Feed Efficiency In Beef Cattle Through Selection Upon Residual Feed Intake Rfi

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Improvement of Feed Efficiency in Beef Cattle Through Selection Upon Residual Feed Intake (RFI)

Author : Nicholas Oliver Minton
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (711 download)

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Book Synopsis Improvement of Feed Efficiency in Beef Cattle Through Selection Upon Residual Feed Intake (RFI) by : Nicholas Oliver Minton

Download or read book Improvement of Feed Efficiency in Beef Cattle Through Selection Upon Residual Feed Intake (RFI) written by Nicholas Oliver Minton and published by . This book was released on 2010 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selecting beef cattle which metabolically are more efficient at converting feed into gain or body weight maintenance is one way to reduce feed cost in beef production. Residual feed intake (RFI) is one trait used to identify animals which are metabolically feed efficient or inefficient. Trials in the current study investigated whether animal RFI varies between trials conducted at two different stages of maturity and the influence on progeny feed efficiency when sires and dams of known RFI phenotypes are mated. We further investigated whether RFI measured postweaning or later in maturity more accurately predicted progeny feed efficiency in addition to whether ribeye area and body composition varied between steers from either RFI- or RFI+ dams. Reranking in RFI of animals did occur between trials, however; RFI phenotype was correlated (rp = 0.54; P [lesser than] 0.01) between postweaning and mature trials indicating animals identified as feed efficient or inefficient remain feed efficient or inefficient further into maturity. More efficiently mated RFI- sires and dams produced heifer and steer progeny with higher feed efficiencies (P [lesser than] 0.05; P [lesser than] 0.10, respectively) with no difference in average daily gain (P = 0.52) in comparison to progeny from RFI+ sires and dams. Postweaning dam RFI phenotype showed stronger correlations to progeny RFI phenotype (rp = 0.60; P [lesser than] 0.05) while steers from RFI- dams tended (P [lesser than] 0.10) to have larger developments in ribeye area with no variation (P [greater than] 0.10) in body composition to steers from RFI+ dams. Selection upon RFI is an accurate trait to select upon to improve herd feed efficiency as well as increase profitability in beef production.

Feed efficiency in swine

Author : John F. Patience
Publisher : Springer Science & Business Media
ISBN 13 : 9086867561
Total Pages : 264 pages
Book Rating : 4.0/5 (868 download)

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Book Synopsis Feed efficiency in swine by : John F. Patience

Download or read book Feed efficiency in swine written by John F. Patience and published by Springer Science & Business Media. This book was released on 2012-10-15 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'Feed efficiency in swine' has been prepared as a comprehensive treatise on the current state of our understanding of this topic which is so important to the pork industry. Each chapter is written by international authorities who understand both the science and application of their topic area. The book provides detailed insight into the many factors affecting feed efficiency, ranging from diet processing to herd health, from nutrition to physiology and from day-to-day barn management to the adoption of advanced technologies. The authors explain such practical aspects as the challenge of interpreting feed efficiency information obtained on farm or the role of liquid feeding. The authors also delve into more scientific topics such as amino acid or energy metabolism or animal physiology. This book is written for people who have a technical interest in pork production, including nutritionists, geneticists, farm management specialists, veterinarians, other academics and, of course, pork producers.

Feed Efficiency in the Beef Industry

Author : Rodney A. Hill
Publisher : John Wiley & Sons
ISBN 13 : 0470959525
Total Pages : 328 pages
Book Rating : 4.4/5 (79 download)

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Book Synopsis Feed Efficiency in the Beef Industry by : Rodney A. Hill

Download or read book Feed Efficiency in the Beef Industry written by Rodney A. Hill and published by John Wiley & Sons. This book was released on 2012-09-11 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Feed Efficiency in the Beef Industry provides a thorough and concise overview of feed efficiency in beef cattle. It frames the great importance of feed efficiency to the industry and details the latest findings of the many scientific disciplines that intersect and aim to improve efficient and sustainable production of nutritious beef. The vast majority of production costs are directly tied to feed. With increased demand for grains to feed a rapidly increasing world population and to supply a new demand for alternative fuels, feed costs continue to increase. In recent years, the negative environmental impacts of inefficient feeding have also been realized; as such feed efficiency is an important factor in both economic viability and environmental sustainability of cattle production. Feed Efficiency in the Beef Industry covers a broad range of topics ranging from economic evaluation of feed efficiency to the physiological and genetic bases of efficient conversion of feed to high quality beef. Chapters also look at how a fuller understanding of feed efficiency is leading to new selective breeding efforts to develop more efficient cattle. With wide-ranging coverage from leading international researchers, Feed Efficiency will be a valuable resource for producers who wish to understand the complexities, challenges, and opportunities to reduce their cost of production, for students studying the topic and for researchers and professionals working in the beef industry.

Biology of Domestic Animals

Author : Colin G. Scanes
Publisher : CRC Press
ISBN 13 : 1351648136
Total Pages : 509 pages
Book Rating : 4.3/5 (516 download)

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Book Synopsis Biology of Domestic Animals by : Colin G. Scanes

Download or read book Biology of Domestic Animals written by Colin G. Scanes and published by CRC Press. This book was released on 2017-09-01 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is increasing interest in the biology of domestic animals ranging from genomics, transcriptomics, metabolomics, nutritional physiology, and systems biology. This book touches on all of these, with a particular focus on topics such as domestic animals as comparative models to humans, molecular regulation of growth, metabolic efficiency, reproduction, and the impact of stress on growth and development. The book concludes with a discussion on the current and future directions for researchers.

Residual Feed Intake in Beef Cattle; in Relation to Breed, Selection, and Behavior

Author : Marcus McGee
Publisher :
ISBN 13 :
Total Pages : 310 pages
Book Rating : 4.:/5 (927 download)

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Book Synopsis Residual Feed Intake in Beef Cattle; in Relation to Breed, Selection, and Behavior by : Marcus McGee

Download or read book Residual Feed Intake in Beef Cattle; in Relation to Breed, Selection, and Behavior written by Marcus McGee and published by . This book was released on 2014 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Feed efficiency is a necessary factor in beef production systems due to rising feed ingredient costs, population growth, and beef supply demands. With this known, it is important for researchers to delve into mechanisms involved in efficiency to provide producers with a knowledge base for future selection and breeding programs. Though the use of residual feed intake (RFI) is fairly well know, traditional traits are often considered more desirable due to costs associated with testing. However, previous research has provided evidence of benefits using a less biased measurement (RFI) in comparison with its counterparts (e.g. ADG, FCR, F:G etc.) Though RFI does provide indication of efficiency status, there are underlying mechanisms that also play a role in these measurements that are not completely understood. One attribute of efficiency often overlooked is feeding behavior, in which this body of work attempts to interpret via relationships with RFI. Previous research has provided has examined relationships between these two parameters, however further studies are necessary to gain a more solid foundation. Research within this dissertation will add to this knowledge base using two breeds of cattle examined for behavior traits (bunk visit frequency, bunk visit duration, feed bout frequency, feed bout duration, meal frequency, meal duration, and average meal intake) during the course of RFI evaluation. Niche breeds of beef cattle (e.g. Japanese Black Cattle) are often excluded from feed efficiency examinations, due to focuses of output, carcass quality traits, and increased specialty market value. However, the recent rise of feed ingredient costs are universal, and producers of niche breeds may benefit as well. Within this body of work, 3 cohorts of Wagyu cattle were evaluated for feeding behavior parameters with some insight towards relationships with efficiency. Red Angus cattle were also evaluated over both growing and finishing phase RFI to clarify feeding behaviors' role in efficiency. Results from these studies provide researchers with additional tools for elucidating these relationships as well as identifying specific feeding behaviors that contribute to efficiency status in beef cattle.

Evaluating Residual Feed Intake in Replacement Heifer Calves for Correlation with Breed and Sire

Author : Ashley Diane Wright
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (884 download)

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Book Synopsis Evaluating Residual Feed Intake in Replacement Heifer Calves for Correlation with Breed and Sire by : Ashley Diane Wright

Download or read book Evaluating Residual Feed Intake in Replacement Heifer Calves for Correlation with Breed and Sire written by Ashley Diane Wright and published by . This book was released on 2014 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: With feed costs representing on average 65% of the total cost of production improvements in feed efficiency could have a major impact on the beef industry. Postweaning performance and feed efficiency data were collected on 114 heifers born on the University of Arizona's V bar V Ranch. Residual feed intake (RFI) was significantly correlated with dry matter intake (DMI) (r = 0.46) and G:F (r = -0.43), while G:F was moderately correlated with initial age (r = -0.54), initial body weight (r = -0.40), and average daily gain (ADG) (r = 0.68). Residual gain (RG) was moderately correlated with RFI (r = -0.41) and highly correlated with ADG (0.62) and G:F (0.73). In addition, RG was significantly correlated (r = -0.21) with initial weight suggesting that selection for RG could lead to increased cow mature size. Heifers were sorted into three breed categories: Hereford, Hereford cross, and Wagyu cross and breed effect on performance and feed efficiency traits were analyzed. Significant differences in DMI, FCR, and RG were noted, but likely due to significant differences in age at the time of testing. RFI was not significantly different between breed groups, suggesting that RFI is less influenced by animal age than other measures of feed efficiency. In addition, sires of study heifers with 5 or more progeny were selected and progeny performance and feed efficiency traits were compared between sires. No significant differences in ADG, RFI, FCR, or RG were noted between sire progeny. This was likely due to an insufficient number of progeny used in the trial. Further research and an increased number of animals used may uncover significant impacts of sire on RFI.

Guidelines for Uniform Beef Improvement Programs

Author : Dixon D. Hubbard
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Guidelines for Uniform Beef Improvement Programs by : Dixon D. Hubbard

Download or read book Guidelines for Uniform Beef Improvement Programs written by Dixon D. Hubbard and published by . This book was released on 1981 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Quantitative Aspects of Ruminant Digestion and Metabolism

Author : Jan Dijkstra
Publisher : CABI
ISBN 13 : 9780851998145
Total Pages : 734 pages
Book Rating : 4.9/5 (981 download)

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Book Synopsis Quantitative Aspects of Ruminant Digestion and Metabolism by : Jan Dijkstra

Download or read book Quantitative Aspects of Ruminant Digestion and Metabolism written by Jan Dijkstra and published by CABI. This book was released on 2005 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of this book. Published in 1993, was very well received as providing a comprehensive review of the digestion and metabolism of ruminant animals. Since its publication, much new research has been conducted in the subject and knowledge has increased. This new edition includes Dr. Dijkstra as an additional editor and four completely new chapters. These cover: the gas production technique in feed evaluation; the relationship between pasture characteristics and animal performance; calorimetry; and feed processing. Other chapters have been expanded or updated as appropriate.

Feed Efficiency in the Beef Industry

Author : Rodney A. Hill
Publisher : John Wiley & Sons
ISBN 13 : 1118388240
Total Pages : 328 pages
Book Rating : 4.1/5 (183 download)

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Book Synopsis Feed Efficiency in the Beef Industry by : Rodney A. Hill

Download or read book Feed Efficiency in the Beef Industry written by Rodney A. Hill and published by John Wiley & Sons. This book was released on 2012-06-18 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Feed Efficiency in the Beef Industry provides a thorough and concise overview of feed efficiency in beef cattle. It frames the great importance of feed efficiency to the industry and details the latest findings of the many scientific disciplines that intersect and aim to improve efficient and sustainable production of nutritious beef. The vast majority of production costs are directly tied to feed. With increased demand for grains to feed a rapidly increasing world population and to supply a new demand for alternative fuels, feed costs continue to increase. In recent years, the negative environmental impacts of inefficient feeding have also been realized; as such feed efficiency is an important factor in both economic viability and environmental sustainability of cattle production. Feed Efficiency in the Beef Industry covers a broad range of topics ranging from economic evaluation of feed efficiency to the physiological and genetic bases of efficient conversion of feed to high quality beef. Chapters also look at how a fuller understanding of feed efficiency is leading to new selective breeding efforts to develop more efficient cattle. With wide-ranging coverage from leading international researchers, Feed Efficiency will be a valuable resource for producers who wish to understand the complexities, challenges, and opportunities to reduce their cost of production, for students studying the topic and for researchers and professionals working in the beef industry.

Determination of Sources of Variation, and Prediction Of, Feed Intake and Efficiency in Dairy Cows

Author : Malia J. Caputo
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)

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Book Synopsis Determination of Sources of Variation, and Prediction Of, Feed Intake and Efficiency in Dairy Cows by : Malia J. Caputo

Download or read book Determination of Sources of Variation, and Prediction Of, Feed Intake and Efficiency in Dairy Cows written by Malia J. Caputo and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Feed is the single greatest expense on a dairy farm, representing approximately half the cost of dairy production over the last ten years. Increasing feed efficiency can reduce feed costs while maintaining milk production levels, improving profitability and sustainability of dairy production. Residual feed intake (RFI) is a measure of feed efficiency that represents the unexplained variation in feed intake after accounting for known energy sinks (i.e., milk energy output, body size, body weight change) within a group of cows managed similarly. Dry matter intake (DMI) is required to determine RFI, yet it is labor intensive and cost prohibitive to collect on most privately-owned dairies. Accurate prediction models of DMI could replace physical measurement, allowing for phenotypic feed efficiency determination on privately-owned dairies. When comparing multiple predictive approaches, traditional linear regression approaches performed as well as, or better than, more advanced techniques. Incorporation of behavioral sensor variables, but not blood metabolites, improved models of DMI, representing an opportunity to improve current models of DMI. Deeper understanding of the mechanisms that contribute to variation in feed efficiency would provide further insight into genetic selection for feed efficiency and can lead to the development of management and nutrition strategies to improve feed efficiency. Postpartum health may influence RFI, given the relationship with energy balance; however, no relationship exists between postpartum health disorders and same-lactation RFI, indicating that genetically selecting for RFI will not inadvertently select for negative health outcomes. Post-absorptive nutrient metabolism was previously identified in beef cattle as a source of variation in RFI, but was not investigated in lactating dairy cows. Between cows divergent in RFI, the blood circulating profile of metabolites differed, indicating differences in fatty acid or amino acid oxidation and providing evidence that post-absorptive nutrient metabolism is a source of variation in RFI of dairy cows. Differences in liver tissue pathways related to oxidative stress, cell cycling, and immune function, and differences in muscle fatty acid and glucose metabolism were identified, suggesting tissue-specific differences that contribute to variation in RFI. This dissertation details deeper understanding of post-absorptive nutrient metabolism as a source of variation in RFI, and ongoing effort will contribute to improving the feed efficiency of the dairy breed, which could have measurable impacts profitability and sustainability of dairy production.

Leanness in Domestic Birds

Author : B. Leclercq
Publisher : Elsevier
ISBN 13 : 1483100790
Total Pages : 420 pages
Book Rating : 4.4/5 (831 download)

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Book Synopsis Leanness in Domestic Birds by : B. Leclercq

Download or read book Leanness in Domestic Birds written by B. Leclercq and published by Elsevier. This book was released on 2014-05-20 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leanness in Domestic Birds: Genetic, Metabolic, and Hormonal Aspects is a proceeding of a symposium held in Tours, France, from 4 to 6 August 1987. Said symposium was concerned with genetic and metabolic factors associated with leanness of poultry and accounts of research in these areas. The book is divided into six parts. Part I covers studies that involve genetics in the selection of meat leanness. Part II deals with the relationship of feed intake and metabolism to the leanness of poultry. Part III discusses the lipid metabolism in birds and its related factors and effects. Part IV talks about the use of hormones such as insulin, thyroid hormones, and corticosteroids in the control of fatness in birds. Part V covers studies involving amino acid metabolism and its relation to leanness in poultry, and Part VI talks about the applications of the studies in commercial use. The text is recommended for zoologists, agriculturists, and poultry farmers who would like to know more about the different factors that affect the leanness of domestic birds and its implications.

Feeding Strategies to Improve Sustainability and Welfare in Animal Production

Author : Fulvia Bovera
Publisher : MDPI
ISBN 13 : 3039432524
Total Pages : 535 pages
Book Rating : 4.0/5 (394 download)

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Book Synopsis Feeding Strategies to Improve Sustainability and Welfare in Animal Production by : Fulvia Bovera

Download or read book Feeding Strategies to Improve Sustainability and Welfare in Animal Production written by Fulvia Bovera and published by MDPI. This book was released on 2021-04-23 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the scientific contributions published within the Animals topical collection “Feeding Strategies to Improve Sustainability and Welfare in Animal Production”. Originally a Special Issue, it has turned into a permanent collection, with its first article being published in July 2019 and more than 30 published articles a year later: evidence of the great interest from the scientific community regarding the topics addressed. The articles, which are grouped by species (poultry, ruminants, pigs, etc.) and by topic, deal with a wide range of arguments that, first of all, highlight the extraordinary complexity and diversity that exists in the animal production sector, and then, the great influence that nutrition and feeding can have in terms of optimizing the use of environmental resources and improving the welfare of farmed animals. In addition, all this is closely connected with the urgent need to safeguard the resources of the planet on which we live.

Sources of Biological Variation in Residual Feed Intake in Beef Cattle

Author : Phillip Allan Lancaster
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (69 download)

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Book Synopsis Sources of Biological Variation in Residual Feed Intake in Beef Cattle by : Phillip Allan Lancaster

Download or read book Sources of Biological Variation in Residual Feed Intake in Beef Cattle written by Phillip Allan Lancaster and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Objectives of this study were to characterize residual feed intake (RFI) in growing calves and to examine relationships with growth, carcass composition, physiological indicators, energy metabolism and reproduction. To accomplish these objectives, multiple experiments were conducted. In all experiments, RFI was calculated as the difference between actual DMI and expected DMI from linear regression of DMI on mid-test metabolic BW and ADG. To examine the relationships between RFI and rate and composition of growth, and reproduction an experiment was conducted with postweaning Brangus heifers (N = 348). Measures of carcass composition (longissimus muscle area, LMA; and 12th rib fat thickness, BF) were obtained by ultrasound at the start and end of each experiment. To determine if serum IGF-I concentration is associated with RFI, two experiments were conducted with Angus bulls and heifers (N = 95) divergently selected for serum IGF-I concentration. To evaluate relationships with energy metabolism, calves with low and high RFI were selected for determination of heart rate as an indicator trait for energy expenditure (4 experiments) and liver mitochondrial function (3 experiments). Residual feed intake was not correlated with ADG, but was positively correlated with gain in BF such that the more efficient calves were leaner. Calves from the low IGF-I selection line had lower RFI suggesting that RFI and IGF-I are related and that IGF-I could be used as an indicator trait to aid in selection for improved RFI in Angus cattle. Calves with low RFI had lower energy expenditure and greater mitochondrial acceptor control ratios than calves with high RFI suggesting improved regulation of energy metabolism. A similar percentage of heifers with low RFI attained puberty as those with high RFI by the end of the experiment. Results from this study indicate that producers can utilize RFI to select for improved feed efficiency with minimal impact on growth, carcass composition and reproduction.

Forage Fiber Analyses (apparatus, Reagents, Procedures, and Some Applications)

Author : H. K. Goering
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.X/5 (3 download)

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Book Synopsis Forage Fiber Analyses (apparatus, Reagents, Procedures, and Some Applications) by : H. K. Goering

Download or read book Forage Fiber Analyses (apparatus, Reagents, Procedures, and Some Applications) written by H. K. Goering and published by . This book was released on 1970 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mitigation of Greenhouse Gas Emissions in Livestock Production

Author : Pierre J. Gerber
Publisher : Food & Agriculture Organization of the UN (FAO)
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Mitigation of Greenhouse Gas Emissions in Livestock Production by : Pierre J. Gerber

Download or read book Mitigation of Greenhouse Gas Emissions in Livestock Production written by Pierre J. Gerber and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2013 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current analysis was conducted to evaluate the potential of nutritional, manure and animal husbandry practices for mitigating methane (CH4) and nitrous oxide (N2O) - i.e. non-carbon dioxide (CO2) - GHG emissions from livestock production. These practices were categorized into enteric CH4, manure management and animal husbandry mitigation practices. Emphasis was placed on enteric CH4 mitigation practices for ruminant animals (only in vivo studies were considered) and manure mitigation practices for both ruminant and monogastric species. Over 900 references were reviewed; simulation and life cycle assessment analyses were generally excluded

Rangeland Systems

Author : David D. Briske
Publisher : Springer
ISBN 13 : 3319467093
Total Pages : 664 pages
Book Rating : 4.3/5 (194 download)

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Book Synopsis Rangeland Systems by : David D. Briske

Download or read book Rangeland Systems written by David D. Briske and published by Springer. This book was released on 2017-04-12 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY-NC 2.5 license. This book provides an unprecedented synthesis of the current status of scientific and management knowledge regarding global rangelands and the major challenges that confront them. It has been organized around three major themes. The first summarizes the conceptual advances that have occurred in the rangeland profession. The second addresses the implications of these conceptual advances to management and policy. The third assesses several major challenges confronting global rangelands in the 21st century. This book will compliment applied range management textbooks by describing the conceptual foundation on which the rangeland profession is based. It has been written to be accessible to a broad audience, including ecosystem managers, educators, students and policy makers. The content is founded on the collective experience, knowledge and commitment of 80 authors who have worked in rangelands throughout the world. Their collective contributions indicate that a more comprehensive framework is necessary to address the complex challenges confronting global rangelands. Rangelands represent adaptive social-ecological systems, in which societal values, organizations and capacities are of equal importance to, and interact with, those of ecological processes. A more comprehensive framework for rangeland systems may enable management agencies, and educational, research and policy making organizations to more effectively assess complex problems and develop appropriate solutions.

Effects of Management Regimen, Residual Feed Intake and Reranking on Performance, Carcass and Meat Quality in Beef Steers

Author : Natalie Ferriman
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Effects of Management Regimen, Residual Feed Intake and Reranking on Performance, Carcass and Meat Quality in Beef Steers by : Natalie Ferriman

Download or read book Effects of Management Regimen, Residual Feed Intake and Reranking on Performance, Carcass and Meat Quality in Beef Steers written by Natalie Ferriman and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Residual feed intake (RFI) is a measurement of feed efficiency and is becoming a popular trait used in genetic selection. This study evaluated the effects of RFI classification on beef cattle performance, carcass and meat quality and its repeatability between growing and finishing phases of production. Cattle were managed on two different nutritional management regimens consisting of finishing on a high grain diet or backgrounding cattle prior to being finished on a high grain diet. Extensive RFI reranking occurred between production phases. Reranking was positively correlated with longissimus muscle area but did not influence other carcass and meat quality parameters. Growing phase RFI classification had a minimal effect on carcass traits, while low RFI classified steers in the finishing phase produced bigger ribeyes. High RFI steers produced juicier and more tender beef compared to low RFI steers assessed using taste panel and consumer evaluations.