NDLI: Chromosome banding studies in an Indian mullet: evidence of structural rearrangements from NOR locations.

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Chromosome banding studies in an Indian mullet: evidence of structural rearrangements from NOR locations.

Content Provider	Semantic Scholar
Author	Chakrabarti, J. Khuda-Bukhsh, Anisur Rahman
Copyright Year	2000
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.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://nopr.niscair.res.in/bitstream/123456789/23965/1/IJEB%2038(5)%20467-470.pdf
PubMed reference number	11272411
Volume Number	38
Issue Number	5
Journal	Indian journal of experimental biology
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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