PMID- 24260656
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20131122
LR  - 20211021
IS  - 1993-0771 (Print)
IS  - 1993-078X (Electronic)
IS  - 1993-0771 (Linking)
VI  - 6
IP  - 2
DP  - 2012
TI  - First karyotype description of Hypostomus iheringii (Regan, 1908): a case of 
      heterochromatic polymorphism.
PG  - 115-25
LID - 10.3897/CompCytogen.v6i2.2595 [doi]
AB  - In this study, which is the first karyotype analysis of Hypostomus iheringii, 
      nine specimens collected in Corrego 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.
FAU - Traldi, Josiane Baccarin
AU  - Traldi JB
AD  - Universidade Federal de Sao Carlos, Departamento de Genetica e Evolucao, Rodovia 
      Washington Luis Km 235, Sao Carlos-SP, 13565-905, Brazil.
FAU - Vicari, Marcelo Ricardo
AU  - Vicari MR
FAU - Blanco, Daniel Rodrigues
AU  - Blanco DR
FAU - Martinez, Juliana de Fatima
AU  - Martinez Jde F
FAU - Artoni, Roberto Ferreira
AU  - Artoni RF
FAU - Moreira-Filho, Orlando
AU  - Moreira-Filho O
LA  - eng
PT  - Journal Article
DEP - 20120316
PL  - Bulgaria
TA  - Comp Cytogenet
JT  - Comparative cytogenetics
JID - 101503807
PMC - PMC3833790
OTO - NOTNLM
OT  - Hypostomini
OT  - chromosome variation
OT  - fish
OT  - heterochromatinization
EDAT- 2012/01/01 00:00
MHDA- 2012/01/01 00:01
PMCR- 2012/03/16
CRDT- 2013/11/22 06:00
PHST- 2011/12/27 00:00 [received]
PHST- 2012/02/15 00:00 [accepted]
PHST- 2013/11/22 06:00 [entrez]
PHST- 2012/01/01 00:00 [pubmed]
PHST- 2012/01/01 00:01 [medline]
PHST- 2012/03/16 00:00 [pmc-release]
AID - 10.3897/CompCytogen.v6i2.2595 [doi]
PST - epublish
SO  - Comp Cytogenet. 2012 Mar 16;6(2):115-25. doi: 10.3897/CompCytogen.v6i2.2595. 
      eCollection 2012.