مهرداد عباسی - Dept. of Botany, Plant Pests & Diseases Research Institute, P.O. Box ۱۴۵۴, Tehran ۱۹۳۹۵, Iran E-mail: puccinia_۲۰۰۰@yahoo.com
قربانعلی حجارود - Dept. of Plant Protection, College of Agriculture, University of Tehran, Karaj, Iran
مارکوس شولر - State Museum of Natural History, Karlsruhe, Germany
استفان ب گودوین - USDA-ARS, West Lafayette, IN, USA

Morphological studies and phylogenetic analysis based on the ITS sequence data showed that there is considerable differences within the Puccinia striiformis complex on members of Triticeae(Triticum and Hordeum), Dactylis glomerata and Poa pratensis. Based on the above molecular and morphological data, we suggest dividing P. striiformis as follows: - P. striiformis s. str. mainly on Triticeae. - P. pseudostriiformis sp. nov. on Poa pratensis (Poeae) - P. striiformoides nom. et stat. nov. on Dactylis glomerata (Poeae)

fungus, yellow rust, Poaceae, Puccinia, Taxonomy