مقايسه كاريولوژي برخي ارقام يونجه

Alfalfa (Medicago sativa L.) from family of Fabaceae grows extensively in farms and rangelands in Iran. Cytogenetic study is very important for plant improvement. In order to morphology of chromosomes in three cultivars (Maopa, Hamedani, CUF101) of medicago, 10-100 slide sample for each cultivar were prepared and studied, using their root meristem after fixation, hydrolysis and staining stages. Cytogenetic investigations showed that each three cultivars were 2n = 4x = 32. Karyotypic formula of Hamedani & CUF101 were 6M + 6SM + 4AC and at Maopa cultivar was 4M + 8SM + 4AC and chromosomes can were paired upon morphologic resemblants. Chromosomes number 1 with 3 ,2 with 5 ,6 with 7 ,10 with 11, 12 with 13, 15 with 16 were paired and formed four covalant. Lenght of the tallest and the shortest chromosome in Hamedani & CUF101 cultivars were 1.8/l/ to 10 1/j respectively, but this values was estiminated in Maopa cultivar 1.9/j 1.1/j. Maopa cultivar has more symetric, because has the most TF percent.