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Expression of genes for ribosomal RNA in barley lines with the standard karyotype and with a translocated nucleolus organizer



Expression of genes for ribosomal RNA in barley lines with the standard karyotype and with a translocated nucleolus organizer



Genetika, USSR 22(4): 557-565



In a study of embryos of the normal variety Frigga and the translocation line T506, with 2 nucleolus organizers on opposite arms of chromosome 6 and a reduced number of nucleoli at telophase, no difference between the forms was found in rRNA synthesis in vivo or RNA polymerase I activity in isolated nuclei. The genes for ribosomal RNA showed greater sensitivity to DNase I than the total nuclear DNA, indicating that the bulk of rRNA genes were in active chromatin.

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