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18S-28S rDNA is interspersed throughout heterochromatin in the millepede Enologus oxypygum (Diplopoda)

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Abstract

In the present study, somatic metaphase chromosomes of the millipede Enologus oxypygum (Diplopoda: Julida) were hybridized in situ with a sea urchin (Echinodermata) ribosomal probe (prRl4) in order to map major RNA genes (rDNA). Chromosomal preparations were also silver stained (Ag-NOR) to evaluate the rDNA transcriptional activity. Our results indicate that RNA genes are throughout heterochromatin in eight chromosomes involving 1/4 of the total heterochromatin which, in this species, is about 67% of the total DNA. Ag-NOR and FISH patterns were not coincident.

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Vitturi, R., Colomba, M., Mandrioli, M. et al. 18S-28S rDNA is interspersed throughout heterochromatin in the millepede Enologus oxypygum (Diplopoda). Genetica 110, 151–155 (2000). https://doi.org/10.1023/A:1017928826304

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  • DOI: https://doi.org/10.1023/A:1017928826304

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