Abstract
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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Pendás, A.M., Morán, P. & García-Vázquez, E. Multi-chromosomal location of ribosomal RNA genes and heterochromatin association in brown trout. Chromosome Res 1, 63–67 (1993). https://doi.org/10.1007/BF00710608
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DOI: https://doi.org/10.1007/BF00710608