Giemsa N-banding pattern in two tetraploid cytotypes of wild barley (Hordeum bulbosum L.)

Distribution pattern of constitutive heterochromatin in 2 tetraploid cytotypes of Hordeum bulbosum was studied by Giemsa N-banding technique. Ideograms were developed for the description of individual N-bands. The N-banding pattern is characterized by having one or two centromeric or juxtacentromeric very small bands per chromosome. Further, single bands are present at one side of the nucleolar organizers. The N-banded karyotype of H. bulbosum (4x) supports the argument that it is an autopolyploid derivative of the diploid cytotype.