مطالعه کاریوتیپی هفت گونه‌ جو (Hordeum) در استان فارس

A karyotypic study was performed on seven species of Hordeum Genus including, H. vulgare, H. spontaneum, H. glaucum, H. distichon, H. geniculatum , H. bulbosum and H. violaceum. According to the cytological studies in the laboratory, chromosome numbers and ploidy levels of species were identified. Chromosome analysese including the length of each chromosome, long and short arms length and long - short arm ratio were also done. For each species, the karyotype as an ideogram was drawn. The results showed that H. geniculatum, H. bulbosum, and H. violaceum were tetraploid (2n=4x=28) and the other species were diploid (2n=2x=14). Chromosomal study of H. geniculatum and H. distichon is reported for the first time from Iran. Karyotypic formula showed that the diploid species were 7m and tetraploid were 12m +2sm. According to the karyotypic symmetry, all species were in the 1A class. Using the S%, TF%, D.R.L., T.V. and X parameters, karyotypic symmetry of species was analyzed and determined.