title: Multi-chromosomal location of ribosomal RNA genes and heterochromatin association in brown trout.
abstract: The ribosomal rRNA genes have been mapped by fluorescent in 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.
authors.affiliation: Departmento de Biologia Funcional, Area de Genetica, Facultad de Medicina, Universidad de Oviedo, Spain.
authors.forename: A M
authors.initials: AM
authors.lastname: Pendás
authors.forename: P
authors.initials: P
authors.lastname: Morán
authors.forename: E
authors.initials: E
authors.lastname: Garciía-Vázquez
mesh_terms: D000818:Animals; D001773:Blood Cells / Q000166:cytology / Q000648:ultrastructure; D002871:Chromosome Banding; D002874:Chromosome Mapping; D015342:DNA Probes; D004275:DNA, Ribosomal / Q000032:analysis*; D006570:Heterochromatin / Q000648:ultrastructure*; D017404:In Situ Hybridization, Fluorescence; D008677:Metaphase; D012335:RNA, Ribosomal / Q000235:genetics*; D014337:Trout / Q000235:genetics*
chemical_list: D015342:DNA Probes; D004275:DNA, Ribosomal; D006570:Heterochromatin; D012335:RNA, Ribosomal