Molecular characterization and sensivity of common reed (Phragmites australis) clones to Glyphosate in Iran

Genetic diversity of 39 clones of common reed (Phragmites australis) originating from different geographical areas of Iran was evaluated using RAPD markers. Sixteen primers were used and 149 scorable bands were obtained, among which 123 were polymorphic (81%). Genetic similarity coefficients ranged from 0.44 to 0.85, with an average of 0.60. A dendrogram was prepared on the basis of a similarity matrix of RAPD data using the UPGMA algorithm and separated the 39 clones into four groups which were mainly in accordance with geographical origins. To study the responses of different clones of common reed to glyphosate and to determin the best growth stage for chemical control, a completely randomaized design with three replications was conducted. Three factors including clone of common reed, the glyphosate rate and treatment time were used. Clones responded differentially to glyphosate rates and treatment at flowering stage provided the best control.