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
                                            Cole, Johnitem
                                            Vanraden, Paulitem
                                            O'CONNELL, J - UNIV OF MARYLANDitem
                                            Van Tassell, Curtis

                                                         - *Curt*item
                                            Sonstegard, Taditem
                                            SCHNABEL, R - UNIV OF MISSOURIitem
                                            Wiggans, George
  Submitted to: International Committee on Animal Recording(ICAR)
                                    Publication Type: Proceedings
                                    Publication Acceptance Date: 6/18/2008
                                    Publication  Date: 1/12/2009
                                    Citation: Cole, J.B., Van Raden, P.M., O'Connell, J.R., Van Tassell, C.P., Sonstegard, T.S., Schnabel, R.D., Wiggans, G.R. 2009. Distribution and Location of Genetic Effects for Dairy Traits. International Committee on Animal Recording (ICAR). ICAR Tech Ser. 13:355–360. 2009.  Interpretive Summary: Genes affecting many dairy traits and total economic merit are fairly evenly distributed across all chromosomes in the bovine genome. A high-density scan using 39,314 SNP markers for 5,285 bulls confirmed two previously-known major genes on BTA 6 and 14 but revealed few other large effects. Markers on BTA 18 had large effects on calving ease, several conformation traits, longevity, and economic merit. Prediction accuracy was highest when models assumed that each marker had some effect on each trait, but allowed some markers to have large effects while most had small effects. Markers on the X chromosome were used to calculate sex-specific evaluations for males and females, but differences were small. The results validate the assumptions in quantitative genetic theory.
                                Technical Abstract: Genetic effects for many dairy traits and for total economic merit are fairly evenly distributed across all chromosomes. A high-density scan using 39,314 SNP markers for 5,285 bulls confirmed two previously-known major genes on BTA 6 and 14 but revealed few other large effects. Markers on BTA 18 had the largest affects on calving ease, several conformation traits, longevity, and total merit. Prediction accuracy was highest when priors assumed that each marker had an effect on each trait, but with a heavy-tailed distribution. Markers on the X chromosome were summed separately to provide different evaluations for male vs. female progeny, but differences were small. Results validate quantitative genetic assumptions.


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