ArticleComparative cytogenetics2012
First karyotype description of Hypostomus iheringii (Regan, 1908): a case of heterochromatic polymorphism.
Article in Comparative cytogenetics, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 29 citations in OpenAlex.
- Impact of chromosomal polymorphisms on pregnancy outcomes after in vitro fertilization or intracytoplasmic sperm injection: A systematic review and meta-analysis.Pakistan journal of medical sciences · 2025Review
- Karyotypic and Molecular Analysis ofAnimals : an open access journal from MDPI · 2023Article
- Chromosomal polymorphisms have no negative effect on reproductive outcomes after IVF/ICSI-ET/FET.Scientific reports · 2022Article
- Molecular inferences about the genus Hypostomus Lacépède, 1803 (Siluriformes: Loricariidae): a review.Molecular biology reports · 2020Review
- Cytogenetic characterization ofComparative cytogenetics · 2019Article
- Constitutive heterochromatin heteromorphism in the Neotropical armored catfishComparative cytogenetics · 2019Article
- Studies in two allopatric populations ofComparative cytogenetics · 2018Article
- The effect of chromosomal polymorphisms on the outcomes of fresh IVF/ICSI-ET cycles in a Chinese population.Journal of assisted reproduction and genetics · 2016Article
- Cytogenetic data onComparative cytogenetics · 2016Article
- Physical mapping of the 5S and 18S rDNA in ten species of Hypostomus Lacépède 1803 (Siluriformes: Loricariidae): evolutionary tendencies in the genus.TheScientificWorldJournal · 2014Article
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In this study, which is the first karyotype analysis of Hypostomus iheringii, nine specimens collected in Córrego da Lapa (tributary of the Passa-Cinco River) showed a diploid number of 80 chromosomes. Silver nitrate staining and fluorescence in situ hybridization (FISH) with an 18S rDNA probe revealed the presence of multiple nucleolus organizer regions (NORs) (chromosome pairs 13, 20, and 34). FISH with a 5S rDNA probe showed that this cistron was only present in chromosome pair 2. When the karyotypes of individual animals were compared, unique heterochromatic polymorphisms were detected on chromosome pairs 1 and 5. Specifically, specimens had heterochromatic blocks (h+h+) on both chromosomes, one chromosome with heterochromatic blocks (h+h-) or chromosomes that lacked heterochromatic blocks (h-h-). Considering that heteromorphic pattern is not correlated with variation in size, the process of heterochromatinization might act on the long arms of these chromosomes. In summary, all chromosomal markers indicate that the karyotype of Hypostomus iheringii is highly differentiated and that the heterochromatinization of chromosomal segments may have contributed to its karyotypic differentiation.
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