A taxonomic revision of genus Dactylis in Iran

In this research, the taxonomic status of the genus dactylis in Iran has been briefly reviewed. the genus is a perennial , pollinator , retriever and belongs to the family poacea , subfamily pooidea and tribe poeae. To date , there has not been a deteailed taxonomic study of dactylis in iran Therefor, studing and evaluating, morphological , habitat, karyotypic and genetic variation of this genus is important. In total, 58 acceasaation of dactyis by using 62 qualitative and quantitative traits were analyzed. In order to determine the intra specefic relationship, cluster analysis was used with the simple matching method. The results of cluster analysis indicate diversity among the population of this genus. The variability of the wide morphology in this species is due to the larg number of inbreed between the subspecies , the occurrence of extravasation and the gene flow between population, compatibility and impact of ecological factors. In general , based on results of morphological and cytological characters suggested that the genus dactylis with a species D. glomerata L. and two subspecies D.glomerata subsp glomerata L. , D.glomerata subsp hispanica (Roth.) Nym. and tetraploid level a chromosomal number 2n=4x= 28 was present in iran.