Cytogenetic studies on Cervus elaphus. II: Synaptonemal complexes and NOR activity during spermatogenesis

The activity of the nucleolus organizer regions (NORs) in various stages of spermatogenesis of the red deer was studied with the silver staining technique. The Ag-stainability of the NORs, an indicator of the transcriptional activity of the r-RNA genes, is present during the meiotic prophase until p...

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Bibliographic Details
Published in:Genetica 1987-10, Vol.74 (2), p.119-124
Main Authors: LUNGHI, R, RUBINI, M, GOLDONI, D, FONTANA, F
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Cervus elaphus
Cytogenetics
Deer - genetics
Fundamental and applied biological sciences. Psychology
Genetics of eukaryotes. Biological and molecular evolution
Immunohistochemistry
Male
Meiosis
Nucleolus Organizer Region
Prophase
Spermatogenesis
Synaptonemal Complex
Vertebrata
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Summary:The activity of the nucleolus organizer regions (NORs) in various stages of spermatogenesis of the red deer was studied with the silver staining technique. The Ag-stainability of the NORs, an indicator of the transcriptional activity of the r-RNA genes, is present during the meiotic prophase until pachytene and is absent during the remainder of the meiotic prophase, to reappear during the first stages of spermiogenesis and then disappear again during the elongation phase of the spermatids. The development and behaviour of synaptonemal complexes (SCs) of primary spermatocytes were also studied with the silver staining technique under the light microscope. The organization of SC is similar to that of other mammalian species. The pairing behaviour of the axes of the sex chromosomes is described.
ISSN:0016-6707
1573-6857
DOI:10.1007/BF00055222