Multi-chromosomal location of ribosomal RNA genes and heterochromatin association in brown trout

@article{Pendas1993MultichromosomalLO,
  title={Multi-chromosomal location of ribosomal RNA genes and heterochromatin association in brown trout},
  author={Alberto M Pendas and P Mor{\'a}n and Eva Garc{\'i}a-V{\'a}zquez},
  journal={Chromosome Research},
  year={1993},
  volume={1},
  pages={63-67}
}
The ribosomal rRNA genes have been mapped by fluorescentin situ hybridization (FISH) to brown trout chromosomes. One major NOR chromosome pair and 8 novel minor NOR chromosome pairs have been found. Both major and minor NORs were closely related to polymorphic heterochromatin, as revealed by FISH and C-banding. These results are discussed with respect to NOR expression, the relationship between rDNA and heterochromatin, and evolutionary aspects. 

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