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Cytogenetics of the Porthole Shovelnose Catfish, Hemisorubim platyrhynchos (Valenciennes, 1840) (Siluriformes, Pimelodidae), a widespread species in South American rivers
- Source :
- Comparative Cytogenetics 7(2): 103-110, Comparative Cytogenetics, Comparative Cytogenetics, Vol 7, Iss 2, Pp 103-110 (2013)
- Publication Year :
- 2013
- Publisher :
- Pensoft Publishers, 2013.
-
Abstract
- Hemisorubim platyrhynchos is a medium- to large-sized pimelodid catfish distributed along several river basins of the Neotropical Region, noteworthy for representing an important fishery source. In this work, H. platyrhynchos from three isolated populations were cytogenetically analyzed. The karyotype shows a diploid number of 2n=56 chromosomes comprising 22m, 16sm, 10st, 8a (FN=104). NORs detected by AgNO3 were located in the terminal regions of the short arm of a st chromosome pair, as confirmed by CMA3 and FISH using an 18S rDNA probe. C-banding revealed a small amount of heterochromatin in chromosomes, including the NORs, and one biarmed pair that showed conspicuous positive bands on both arms. This fact was also evidenced when using other banding techniques, such as RE (AluI), and indicates that this pair constitutes a species-specific cytogenetic marker.
- Subjects :
- medicine.medical_specialty
Pimelodidae
biology
lcsh:QH426-470
Heterochromatin
Hemisorubim
Cytogenetics
Zoology
Karyotype
Plant Science
biology.organism_classification
Article
Hemisorubim platyrhynchos
lcsh:Genetics
South american
Genetics
medicine
Animal Science and Zoology
Ploidy
Biotechnology
Catfish
Subjects
Details
- Language :
- English
- ISSN :
- 1993078X and 19930771
- Database :
- OpenAIRE
- Journal :
- Comparative Cytogenetics
- Accession number :
- edsair.doi.dedup.....e8dbb7f78e18d3698a1c060a1dfb90c9