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| Content Provider | CSIR - National Institute of Science Communication and Policy Research (NISCPR) |
|---|---|
| Author | Khuda-Bukhsh, A. R. Chakrabarti, J. |
| Abstract | C-, G- and NOR bands have been studied in the female sex of Rhinomugil corsula. (Mugilidae, Pisces) by deploying the conventional methodologies with suitable modifications of minor nature. The diploid metaphase complements contained 48 acrocentric chromosomes. The localization of C-band heterochromatin was found to be mostly at or near the centromeric regions of the acrocentric chromosomes. The G-type bands were not so well defined, but some of the G-banded chromosomes also contained C-bands. Interestingly, silver-positive NORs were found at the telomeric ends of five acrocentric chromosomes, including one homologous pair having NORs in both chromatids, while one chromosome showed NORs in both of its chromatids and the other two had only one NOR localized at one of its chromatids. This would suggest that one homologue of the second pair of NOR-bearing chromosomes possibly underwent a chromatid exchange with a non-NOR bearing chromosome. This is quite a unique situation not reported earlier in any species of fish. , though some other form of NOR-polymorphism/heteromorphism has rarely been reported. Therefore, further exploration in natural populations of this species to examine the other sex and to verify if there also exists other chromosomally polymorphic races (in respect of NOR-polymorphism) of this species, would be rewarding. |
| Ending Page | 470 |
| Starting Page | 467 |
| ISSN | 00195189 |
| e-ISSN | 09751009 |
| Journal | Indian Journal of Experimental Biology (IJEB) |
| Issue Number | 05 |
| Volume Number | 38 |
| Language | English |
| Publisher | CSIR-NISCAIR, India |
| Publisher Date | 2000-05-01 |
| Access Restriction | Open |
| Rights License | CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| Subject Keyword | Experimental Biology Research Journal |
| Content Type | Text |
| Resource Type | Article |
| Subject | Biotechnology Cell Biology Molecular Biology |
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