title: Chromosome location of the ribosomal RNA genes in Triturus vulgaris meridionalis (Amphibia, Urodela).
abstract: The mitotic chromosomes of six specimens from Triturus vulgaris meridionalis have been examined by both in situ hybridization with 3H 18S + 28S rRNA and AS-SAT staining method. The results of these two sets of experiments can be summarized as follows: 1) in each specimen the NORs and the additional ribosomal sites, which react positively to in situ hybridization with 3H 18S + 28S rRNA, are also stained by silver; 2) other chromosomal regions, which do not hybridize in situ with 3H 18S + 28S rRNA, are on the other hand stained by the AS-SAT method. These latter AG-positive sites show a species-specific pattern of chromosomal distribution.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus / Q000378:metabolism; D002874:Chromosome Mapping; D005796:Genes; D008297:Male; D009693:Nucleic Acid Hybridization; D012335:RNA, Ribosomal / Q000235:genetics*; D012834:Silver; D013045:Species Specificity; D013194:Staining and Labeling; D014319:Triturus / Q000235:genetics*
chemical_list: D012335:RNA, Ribosomal; D012834:Silver