'n Vergelykende studie van die kariotipes van Tilapia rendalli, Tilapia sparrmanii en Oreochromis mossambicus (Cichlidae)
Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie/South African Journal of Science and Technology
| Field | Value | |
| Title | 'n Vergelykende studie van die kariotipes van Tilapia rendalli, Tilapia sparrmanii en Oreochromis mossambicus (Cichlidae) A comparative study of the karyotypes of Tilapia rendalli, T. sparrmanii and Oreochromis mossambicus (Cichlidae) | |
| Creator | Swanepoel, A. | |
| Description | Chromosoompreparate is van gestimuleerde limfosietkulture verkry deur middel van 'n kombinasie en modifikasie van verskeie metodes. Tilapia rendalli, T. sparrmanii en Oreochromis mossambicus se somatiese chromosoomgetal is onderskeidelik 44, 42 en 44. Chromosoompare L1 en L2 kon maklik in alle kariotipes geïdentifiseer word en is dus kenmerkend van die tilapias. Tilapia sparrmanii het nog 'n groot metasentriese chromosoompaar (L3), war gepaardgaan met die reduksie van twee in die totale chromosoomgetal. Die F-chromosome is in twee groepe verdeel, naamlik 'n submetasentriese (sm) en 'n telosentriese (t) groep. T. rendalli het 8 sm-chromosome, terwyl T. sparrmanni en O. mossambicus elk 6 chromosome in die sm-groep het. Die res van die F-chromosome was almal telosentries. Met die standaardtegnieke was die identifikasie van die geslagschromosome in die kariotipes van tilapia nog nie moontlik nie. Optimal chromosome preparations were obtained from stimulated lymphocyte cultures with a new method based on a combination and modification of several techniques. Tilapia rendalli, T. sparrmanii and Oreochromis mossambicus have somatic chromosome numbers of 44, 42 and 44, respectively. Chromosome pairs L1 and L2 are easily identified in all the karyotypes and distinctive of the tilapias. Tilapia sparrmanii has one additional large metacentric chromosome pair(L3), which occurs concurrently with the reduction of two in the total chromosome number. The F chromosomes were divided into two groups, viz a submetacentric (sm) and a telocentric (t) group. T. rendalli has 8 sm chromosomes, while both T. sparrmanii and O. mossambicus have 6 chromosomes in the sm group. The rest of the F chromosomes were telocentric. The identification of the sex chromosomes in the karyotypes of tilapia has thus far not been possible using standard techniques. | |
| Publisher | AOSIS | |
| Date | 1992-07-09 | |
| Identifier | 10.4102/satnt.v11i3.540 | |
| Source | Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie; Vol 11, No 3 (1992); 105-109 Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie; Vol 11, No 3 (1992); 105-109 2222-4173 0254-3486 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://journals.satnt.aosis.co.za/index.php/satnt/article/view/540/961
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