A karyotypic study of the genus Vulpia Gmel. (Poaceae) in Iran

Based on the morphological investigations, 5 sepcies of the genus Vulpia grow in Iran. This study concerns the cytotaxonomy of the genus Vulpia Gmel. in Iran. A total of 8 accessions belonging to V. unilateralis, V. myuros, V. persica, V. ciliata and V. hirtiglumis were examined. Mitosis were counted from three root tips of each accession. Diploid numbers counted were 2n=14, 28, 35, 42 with baisic chromosome number x=7. The pentaploidy (2n=5x=35) was observed in V. persica, V. ciliate and V. hirtiglumis and thus ate reported for the first time. The karyotypes and the chromosomal parameters showed an approximately asymmetrical profiles for the species studied. The measured karyotypic parameters revealed significant differences among species studied.