U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 close



Research
                Research Home
                            National Programs
                            Research Projects
                            Scientific Manuscripts
                            International Engagement
                            Scientific Software/Models
                            Databases and Datasets
                            Office of Scientific Quality Review
            Media
                News & Features
                            Multimedia
                            Briefing Room
                            Down on the Farm
                            Press Room
                            Science in Your Shopping Cart
                            Scientific Discoveries
                            Tellus
                            Under the Microscope
            About ARS
                About ARS Home
                            Staff Directory
                            Labs and Research Centers (Map)
                            Headquarter Offices
                            Organizational Chart
                            Employee Services (REE Employees Only)
                            Office of Outreach, Diversity, and Equal Opportunity
            Work With Us
                Work With Us Home
                            ARS Vacancies at USAJOBS
                            Careers at ARS Information
                            Scientific Collaborations
                            Extramural Agreements
                            1890 Faculty Research Sabbatical ProgramSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Ferrell, Calvinitem
                                            Berry, Elaineitem
                                            Freetly, Harveyitem
                                            Miller, Daniel
  Submitted to: Journal of Animal Science Supplement
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 3/19/2004
                                    Publication  Date: 7/26/2004
                                    Citation: Ferrell, C.L., Berry, E.D., Freetly, H.C., Miller, D.N. 2004. Influence of genotype and diet on steer performance [abstract]. Journal of Animal Science 82(Suppl. 1):42.Interpretive Summary:
                                Technical Abstract: Objectives were to evaluate genotype and diet effects on steer performance during the growing period and subsequent responses to a high concentrate diet during the finishing period. Fifty-one [MARC III (M; 14) and Brahman cross (Bx; 37)] steers were allotted to eight pens and individually fed chopped bromegrass hay (BG; N=26; DM=0.85, CP=9.5%, ME=2.19 Mcal/kg) or a corn silage based diet (CS; N=25; DM=0.51, CP=11.9%, ME=2.75 Mcal/kg) for 119 d (PD1) followed by a high corn diet (HC; DM=0.79, CP=11.7, ME=3.08 Mcal/kg) to a target wt of 560 kg (PD2). Data were analyzed by ANOVA with genotype, diet (BG, CS), and the two-way interaction included. The interaction was not significant. Initial (273 kg) and final wts (559 kg) did not differ due to genotype or diet, but wt of BG (325 kg) steers was less than CS (384 kg) steers at the end of PD1. ADG and intake of DM, CP, and ME were less (P<0.05) for Bx than for M during PD1, PD2 and total, but efficiency of M and Bx was similar (P>0.40). Carcass wt, marbling, quality grade, and REA were similar (P>0.12), but Bx steers had greater backfat (1.26 vs. 0.87 cm) and yield grades (P=0.07) than M steers. During PD1, daily DMI (6.91 vs. 7.11 kg) was similar, but CP (0.66 vs. 0.85 kg) and ME (15.2 vs. 19.5 Mcal) intake of BG was less (P<0.001) than CS. DMI/gain (21.5 vs. 6.9), CP intake/gain (2.06 vs. 0.83), and ME intake/gain (47.1 vs. 19.2) were greater in BG. CS manure accumulated more total VFA but less branched-chain VFA and aromatics than BG manure. When fed the HC diet (PD2), feed intake, ADG, and efficiency were improved (P<0.02) in the BG vs. CS steers. Shedding of E. coli 0157 was associated with reduced DMI and ADG (P<0.10). Over the total study, ADG was lower (0.97 vs. 1.03 kg), and DMI (8.50 vs. 7.62) and DMI/gain (8.09 vs. 7.17) were greater in BG than in CS fed steers, but neither CP intake/gain (0.86 vs. 0.84) nor ME intake/gain (22.2 vs. 21.1) differed. Carcass weight, backfat, and yield grade were greater (P<0.04) for CS than for BG, but marbling, quality grade, and REA did not differ.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov