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Title:   Author  item
                                            ABBASI, MEHRDAD - PLANT RES INST TEHRANitem
                                            Goodwin, Stephen

                                                         - *Steve*item
                                            SCHOLLER, MARKUS - PURDUE UNIVERSITYitem
                                            HEDJAROUDE, GH - TEHRAN UNIV, KARAJ
  Submitted to: Mycological International Conference Proceedings
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 8/12/2002
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: Puccinia striiformis (Uredinales), the cause of yellow rust or stripe rust, is a species forming uredinia and telia on various species of Poaceae. It is assumed to be heteroecious, but the aecial host is not known. Currently, two varieties, P. striiformis var. striiformis and P. striiformis var. dactylidis are accepted by most authors. We sequenced the variable internal transcribed spacer (ITS 1+2) region and the more conservative 5.8S gene of the ribosomal DNA and found considerable differences among specimens on Triticum (Triticae), Dactylis glomerata (Poae) and Poa pratensis (Poae). These results correspond with a previous isozyme phenotype study and also with analyses of morphological features. Based on these differences we suggest a three-species system including P. striiformis on numerous hosts (mainly on Triticeae), P. pseudostriiformis sp. nov. on Poa pratensis (Poae), and P. striiformioides nom. et stat. nov. on Dactylis glomerata (Poae).


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