Heterochromatic marker regions (nucleolar organisers) in the chromosomes of the common mussel Mytilus edulis (Mollusca: Pelecypoda)
Dixon, D.R.; McFadzen, I.R.B.; Sisley, K. (1986). Heterochromatic marker regions (nucleolar organisers) in the chromosomes of the common mussel Mytilus edulis (Mollusca: Pelecypoda). J. Exp. Mar. Biol. Ecol. 97(2): 205-212. https://dx.doi.org/10.1016/0022-0981(86)90119-X
In: Journal of Experimental Marine Biology and Ecology. Elsevier: New York. ISSN 0022-0981; e-ISSN 1879-1697, more
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| Keywords |
Cell constituents > Chromosomes
Cell constituents > Chromosomes > Genes
Disciplines > Biology > Genetics > Cytogenetics > Nucleoproteins > Chromatin > Heterochromatin
Protoplasm > Nuclei > Nucleolus
Mytilus edulis Linnaeus, 1758 [WoRMS]
Marine/Coastal |
| Authors | | Top |
- Dixon, D.R.
- McFadzen, I.R.B.
- Sisley, K.
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| Abstract |
The chromosomes of Mytilus edulis were studied using chromosome banding (G- and C-banding) and silver (Ag-) staining techniques. Four pairs of chromosomes, out of the total complement of 14 pairs, were characterized by the presence of conspicuous, G-band negative/C-band positive, heterochromatic regions terminal to their long arms. The affected chromosomes were identified as pairs 1, 8, 11, and 14. Ag-staining revealed that these heterochromatic regions were also the sites of the nucleolar organiser regions (NORs): the specific gene sequences responsible for coding for ribosomal RNA, and which function as the morphological sites around which nucleoli develop at the end of mitosis. |
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