Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/10131
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Relative DNA content of somatic nuclei and chromosomal studies in three genera, Tilapia, Sarotherodon, and Oreochromis of the tribe Tilapiini (Pisces, Cichlidae)
Authors: Majumdar, Krishna C
McAndrew, Brendan
Contact Email: b.j.mcandrew@stir.ac.uk
Issue Date: Feb-1986
Publisher: Springer
Citation: Majumdar KC & McAndrew B (1986) Relative DNA content of somatic nuclei and chromosomal studies in three genera, Tilapia, Sarotherodon, and Oreochromis of the tribe Tilapiini (Pisces, Cichlidae), Genetica, 68 (3), pp. 175-188.
Abstract: Seven Tilapiine species from three genera Tilapia, Sarotherodon, and Oreochromis were cytogenetically studied for chromosome number, chromosome morphology, and DNA content. The chromosome number 2n =44 was the same in all seven species. Arm number (NF) differences indicate the possible role of pericentric invasions in the karyotypic evolution of these species. C-banding of metaphase chromosomes shows that heterochromatin is localised around the centromere in all species of Oreochromis and Sarotherodon but T. zillii has more heterochromatin with six chromosomes having completely C-positive short arms. DNA values vary between 0.84 pq for O. macrochir and 1.21 pq for O. aureus. No heteromorphic sex chromosome pair could be found in any species. These findings suggest that karyotypic evolution has occurred but does not appear to be associated with speciation in this group.
Type: Journal Article
URI: http://hdl.handle.net/1893/10131
DOI Link: http://dx.doi.org/10.1007/BF02424441
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: University of Stirling
Aquaculture

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