Supernumerary heterochromatic segments associated with the nucleolar chromosomes of Pyrgomorpha conica (Orthoptera) contain methylated rDNA sequences

The two nucleolus organizing chromosome pairs of the grasshopper Pyrgomorpha conica can carry a proximal supernumerary heterochromatic segment. We employed different cytological techniques to characterize and analyze the possible origin of this segment. The supernumerary segment and the nucleolus or...

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Veröffentlicht in:	Chromosoma 1993-07, Vol.102 (7), p.491-499
Hauptverfasser:	Suja, J.A, Antonio, C, Gonzalez-Garcia, J.M, Rufas, J.S
Format:	Artikel
Sprache:	eng
Schlagworte:	amplification Animals Biological and medical sciences cell nucleolus Chromosome Banding Cytogenetics DNA methylation DNA Restriction Enzymes DNA, Ribosomal - chemistry DNA, Ribosomal - genetics Fundamental and applied biological sciences. Psychology Genetics of eukaryotes. Biological and molecular evolution Grasshoppers - genetics Grasshoppers - ultrastructure heterochromatin Heterochromatin - ultrastructure In Situ Hybridization, Fluorescence Invertebrata Karyotyping Male Methylation nucleolus organizer Nucleolus Organizer Region - ultrastructure Pyrgomorpha conica ribosomal DNA Staining and Labeling
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