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
                                            McClung, Annaitem
                                            Chen, Ming Hsuanitem
                                            Bockelman, Harolditem
                                            Bryant, Rolfeitem
                                            Yan, Wenguiitem
                                            Fjellstrom, Robert
  Submitted to: Experiment Station Bulletins
                                    Publication Type: Experiment Station
                                    Publication Acceptance Date: 6/20/2005
                                    Publication  Date: 7/5/2005
                                    Citation: McClung, A.M., Chen, M., Bockelman, H.E., Bryant, R.J., Yan, W., Fjellstrom, R.G. 2005. Genetic markers reveal novel genes which control rice cooking quality. Texas Rice, Highlighting Research in 2005. http://beaumont.tamu.edu/eLibrary/Newsletter/2005_Highlights_in_Research.pdf. pp. X-XI.Interpretive Summary:
                                Technical Abstract: Rice molecular markers have been developed in the gene (Waxy) that controls grain amylose content and the gene (Alk) that controls alkali spreading value.  Both of these factors are considered the major determinants of rice cooking quality and texture. This set of markers is now being routinely used by US breeding programs to expedite the development of improved rice cultivars that meet rice cooking quality standards as determined by the US rice industry. For the first time, these markers have been used to characterize a subset of the rice germplasm collection that is maintained by the USDA-ARS National Small Grains Collection. There are over 20,000 accessions in the rice collection and about 1600 of these have been chosen as a representative core subset. These were grown in Stuttgart, AR during 2002 for plant trait evaluation and then sent to the USDA-ARS Rice Research Unit in Beaumont for genetic marker analysis. Several markers associated with the Waxy and Alk genes were evaluated. Fourteen different forms (alleles) of the Waxy gene were identified and 8.2% of the accessions were found to be mixtures. Of the Waxy alleles identified, eight were considered rare alleles, being found in less than 5% of the accessions. Five of these (CT 12, CT 13, CT 15, CT 21, and CT 22) were new alleles, not observed in our previous, smaller surveys. These new alleles were identified from a diversity of regions from around the world.  These results demonstrate that molecular marker evaluation provides an accurate method for characterizing world germplasm that is not influenced by the location where the seed was produced; markers reveal sample mixtures that may be obscured when traditional trait evaluation methods are used; and markers clearly distinguish unique alleles that may be useful for discovering novel cooking and processing qualities in rice.


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