title: Races of Phytophthora sojae in Iran.
abstract: Phytophthora root and stem rot of soybean is a destructive disease of soybean in Iran. Races 1 and 3 of pathogen have already been reported from two major growing regions of the crop, Lorestan and Golestan provinces. In a survey during 2004-2005, 142 isolates of P. sojae were recovered from infected plants and naturally infested soil samples using selective media and soybean leaf baiting technique. The majority of tested isolates (110 isolates) belonged to race one of P. sojae and 32 isolates belonged to race 3. ITS region of 23 isolates were amplified with specific primers Ps1 and Ps2. Sequences of this regions were similar to other gene banks sequences except two isolates from China. This survey showed low diversity in Iranian population of P. sojae.
authors.affiliation: Department of Plant Pathology, Tarbiat Modares University, Tehran, Iran.
authors.forename: Abbas
authors.initials: A
authors.lastname: Mohammadi
authors.forename: Azizollah
authors.initials: A
authors.lastname: Alizadeh
authors.forename: Mansore
authors.initials: M
authors.lastname: Mirabolfathey
authors.forename: Nasrin Nooras
authors.initials: NN
authors.lastname: Mofrad
mesh_terms: D007492:Iran; D010802:Phylogeny; D010838:Phytophthora / Q000145:classification* / Q000235:genetics; D016133:Polymerase Chain Reaction; D013025:Glycine max / Q000382:microbiology; D013045:Species Specificity