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
 Livestock Bio-Systems: Clay Center, NE
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    USMARC Home
                    USMARC Research Units
                        Genetics and Animal Breeding
                                    Meat Safety & Meat Quality
                                    Nutrition, Growth and Physiology
                                    Animal Health GenomicsSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Plains Area Clay Center, Nebraska U.S. Meat Animal Research Center Livestock Bio-Systems 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
- IACUC Summaries

Title:   Author  item
                                            Nonneman, Danny

                                                         - *Dan*item
                                            Rohrer, Garyitem
                                            Rempel, Leaitem
                                            Wiedmann, Ralphitem
                                            Vallet, Jeff
  Submitted to: Plant and Animal Genome Conference Proceedings
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 12/1/2010
                                    Publication  Date: 1/15/2011
                                    Citation: Nonneman, D.J., Rohrer, G.A., Rempel, L.A., Wiedmann, R.T., Vallet, J.L. 2011. Genome-wide associations for age at puberty in a Duroc-Landrace-Yorkshire swine population. Plant and Animal Genome Conference Proceedings. Poster #P609.Interpretive Summary:
                                Technical Abstract: Gilts that achieve puberty earlier tend to be more fertile throughout their breeding lifetime, have a shorter weaning to estrus interval, and have increased retention in the breeding herd with increases in parity. Age at puberty can be changed through selection, but collecting phenotypes can be labor intensive. Because age at puberty is a complex trait, identifying genes that affect pubertal age would greatly contribute to our knowledge of pubertal development. Estrous detection was monitored from 160 to 240 days of age with boar contact in an alleyway between pens of gilts. Nine hundred and eleven gilts representing generations 5-8 of a Duroc-Landrace-Yorkshire crossbred population were genotyped using the Illumina PorcineSNP60 Beadchip. Whole genome association analyses were performed using PLINK. Another group of gilts that did not reach puberty during the test period (non-pubertal; n=91) were analyzed with their pubertal littermates (n=127) using logistic regression (SAS PROC GLIMMIX). The most significant region associated with age at puberty was on SSC2 at 13 Mb with a minor allele frequency of 20% and accounted for about 2.5% of the phenotypic variation. Two regions were significantly associated on SSC1 at 64 and 215 Mb, but had low minor allele frequencies.  The most significant region associated with failure of puberty was on SSC4 at 109 Mb (MAF=36%). Alignment of non-pubertal and quantitative associations showed that five different regions were associated with both. Further investigation should determine what genes are involved in attainment of puberty in gilts.

*USDA is an equal opportunity provider and employer.


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