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
 Dale Bumpers National Rice Research Center: Stuttgart, AR
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Southeast Area Stuttgart, Arkansas Dale Bumpers National Rice Research Center 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
                                            Yan, Wenguiitem
                                            Rutger, Jitem
                                            Bockelman, Harolditem
                                            Tai, Thomas
  Submitted to: Arkansas Agricultural Experiment Station Research Series
                                    Publication Type: Experiment Station
                                    Publication Acceptance Date: 6/20/2004
                                    Publication  Date: 8/13/2004
                                    Citation: Yan, W., Rutger, J.N., Bockelman, H.E., Tai, T. 2004. Germplasm accessions resistant to straighthead in the USDA rice core collection. In: Norman, R.J., Meullenet, J.-F., Moldenhauer, K.A.K., editors. B.R. Wells Rice Research Studies 2003, Arkansas Agricultural Experiment Station Research Series 517. p.97-102. Available: http://www.uark.edu/depts/agripub/Publications/researchseries/Interpretive Summary:
                                Technical Abstract: The USDA rice core collection, containing 1,801 accessions from 115 countries or sources and representing about 10% of the whole collection, was established by a stratified random sampling method.  A total of 990 accessions in the core collection that headed in 110 days or less and were 150 cm or less in height was evaluated for straighthead resistance, on a 1 to 9 scale with 1 being very resistant and 9 being very susceptible.  Twenty-six accessions showed resistance with straighthead ratings ranging from 1.3 to 3.0.  The resistant accessions originated from 10 countries, and varied in heading from 62 to 101 days, and plant height from 68 to 124 cm.  Ten accessions were straighthead tolerant with ratings from 3.3 to 4.0.  The tolerant accessions were from 7 countries, and varied from 56 to 100 days in heading and 66 to 124 cm in plant height.  A preponderance of the straighthead resistant accessions are believed to be indicas, while most of the tolerant ones are believed to be japonicas.  Thus, among the 990 accessions in the test, 36 accessions or 3.6% were either resistant (26) or tolerant (10).  Twenty-four accessions or 2.4% had straighthead ratings from 4.1 to 5.0, 58 accessions or 5.9% from 5.1 to 6.0, 263 accessions or 26.6% from 6.1 to 7.0, 386 accessions or 39.0% from 7.1 to 8.0, and 223 accessions or 22.5% from 8.1 to 9.0.  These resistant germplasms, diversified in origin, maturity and plant height, can be used to improve straighthead resistance in rice breeding in the southern US.


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