Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2000.613.614Allium cepa L.)]]>OkumuAhmet Lutful Hassan 4200034Onion chromosomes (Allium cepa L.; 2n=2x=16) were analyzed for karyotype analysis using aceto-orcein staining technique, and classified due to their lengths from long to short arms whether satellite exists or not.The length of arms appeared to be very close to each other and got more force their identification. The length of long arms showed a variation from 5 to 14 μm while short arms have 2 to 10 μm at the early and late stages of mitotic metaphase. The reason of this variation comes from the stages which observed as late prophase in mitosis. This different chromosome length also was affected in regard to the satellite position seen on long chromosome. The folding rate changed between 1.01 to 2.16 due to the smallest total length of chromosomes.]]>Elci, S.,1982Thomas, H.,1968Avena hirtula to the cultivated hexaploid oat A. sativa.]]>10551563Singh, R.J. and T. Tsuchiya,1982641324Sears, E.R.,19564810Sadanaga, K.,1957Triticum durum and Secale cereal.]]>22312321Holmes, D.S. and S.M. Bougourd,1982Allium schoenoprasum.]]>1982Jones, R.N.,19901990Jenkins, G. and A. Okumus,1992Allium fistulosum L.(Liliaceae).]]>103415422Stockert, J.C., G. Gimenez-Martin and J.M. Sogo,1970Allium cepa.]]>2235250Peffley, E.B., J.N. Corgan, K.E. Horak and S.D. Tanksley,1985Allium alien addition lines.]]>71176184Levan, A., K. Fredga and A.A. Sandberg,196452201220