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
 Crop Production and Pest Control Research: West Lafayette, IN
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Midwest Area West Lafayette, Indiana Crop Production and Pest Control Research 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
- Small Grains Viral Disease Laboratory
- Corn and Sorghum Fungal Disease Laboratory
- Host Plant Resistance to Insects Laboratory
- Wheat/Hessian fly Interactions Laboratory
- Small Grains Fungal Disease Laboratory
- Soybean Quality Improvement Laboratory
- Uniform Soybean Tests, Northern Region

Title:   Author  item
                                            Goodwin, Stephen

                                                         - *Steve*item
                                            ABBASI, MEHRDAD - PLANT PESTS RES INST IRANitem
                                            Cavaletto, Jessicaitem
                                            HEDJAROUDE, G - TEHRAN UNIVERSITY, IRAN
  Submitted to: Mycological Symposium Asian Proceedings
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 9/17/2001
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: Ribosomal internal transcribed spacers (ITS1, 5.8S rRNA gene and ITS2) were PCR-amplified and sequenced from herbarium specimens of different graminicolous Puccinia species.  These sequences were aligned with the profile mode of Clustal X.  Phylogenetic analyses were performed using the neighbor-joining (NJ) algorithm with the Draw N-J Tree option of Clustal X. .Phylogenetic analysis based on the ITS sequence data indicated that Puccinia hordei sensu lato is a complex species.  We recognized three taxa within this complex species: P. hordei sensu stricto on Hordeum vulgare; P. holcina on Lolium temulentum, Lophochloa phleoides and Trisetum flavescens; and P. sp. on Taeniatherum asperum.  In the P. recondita species complex we also recognized different taxa as follows: P. recondita s.s. on Secale segetale and Elymus sp.; P. bromina on Bromus Bromus spp.; P. persistens ssp. triticina (wheat leaf rust) on Triticum  aestivum and Aegilops taushii; and P. persistens ssp. agropyri on Elymus hispidus.  Our phylogenetic analysis showed P. recondita s.s. is more closely related to P. hordei s.l., than to P. persistens.  ITS sequences of leaf rust from Triticum aestivum and leaf rust on Aegilops taushii were identical, which supports the idea that leaf rust collections from wheat could infect Aegilops species.  On the basis of this analysis, variation also was observed among specimens of P. striiformis from wheat, Dactylis glomerata and Poa pratensis.  This result agrees with a previous study on isozyme phenotypes of yellow rust from these hosts.  The taxonomic implication of these results is that populations of P. striiformis on the above-mentioned hosts should be considered as different taxa at least at the infraspecific level.


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