فرزانه بدلی - Graduated MSc Student, Department of Plant Protection, Faculty of Agriculture, Urmia University, P.O. Box ۱۶۵, Urmia, Iran
مسعود ابرین بنا - Assistant Prof., Department of Plant Protection, Faculty of Agriculture, Urmia University, P.O. Box ۱۶۵, Urmia, Iran
جعفر عبداله زاده - Associate Prof., Department of Plant Protection, Faculty of Agriculture, University of Kurdistan, P.O. Box ۴۱۶, Sanandaj, Iran (j.abdollahzadeh@uok.ac.ir)
اسماعیل خالدی - Graduated MSc Student, Department of Plant Protection, Faculty of Agriculture, University of Kurdistan, P.O. Box ۴۱۶, Sanandaj, Iran

Pythium is a fungus-like genus with worldwide distribution that is found in most terrestrial and aquatic ecosystems. It is a species-rich genus contains important plant pathogenic species. Little is known on the systematics of Pythium in West Azarbaijan province (N.W. Iran). Thus, the aim of this study was to identify ۲۰۰ isolates collected from different cultivated soils of West Azarbaijan province during ۲۰۱۲–۱۳. Based on morphological and molecular (ITS and coxI sequences) data, ۱۴ Pythium species from six clades, A, D, E, F, I and J, were identified. Of these, P. ornamentatum from clade D, P. nodosum from clade J and P. stipitatum from clade E are new records for Iran mycobiota. Molecular data failed to separate P. glomeratum, P. ornamentatum and P. viniferum from closely related species and they were identified based on morphological features. Detailed description is presented here for P. minus, P. ornamentatum, P. nodosum and P. stipitatum.

Oomycota, phylogeny, Pythium, water mold