PMID- 10099875
OWN - NLM
STAT- MEDLINE
DCOM- 19990706
LR  - 20191103
IS  - 0967-3849 (Print)
IS  - 0967-3849 (Linking)
VI  - 6
IP  - 8
DP  - 1998 Dec
TI  - Polymorphism of the nucleolus organizer regions (NORs) in Physalaemus petersi 
      (Amphibia, Anura, Leptodactylidae) detected by silver staining and fluorescence 
      in situ hybridization.
PG  - 621-8
AB  - The nucleolus organizer regions (NORs) of both karyotypes I and II of Physalaemus 
      petersi (Jimenez de la Espada, 1872) from the Brazilian Amazon were studied by 
      Giemsa staining, and by the Ag-NOR method. Karyological group I specimens were 
      also studied by the fluorescence in situ hybridization (FISH) technique. Multiple 
      NOR-bearing chromosomes were detected in both karyotypes. The coincident results 
      of the Ag-NOR and FISH methods rule out the occurrence of silent NORs in this 
      anuran. There was no intraindividual NOR variability in either group, but 
      interindividual variability of NORs was high in group I. Seven different patterns 
      of active NOR distribution were definitely recognized among fifteen specimens. 
      This was considered to be a NOR site polymorphism. These results, combined with 
      the C-band polymorphism previously reported for P. petersi, demonstrate a high 
      rate of chromosome evolution in this group.
FAU - Lourenco, L B
AU  - Lourenco LB
AD  - Department of Cell Biology, Biology Institute, Campinas, SP, Brazil.
FAU - Recco-Pimentel, S M
AU  - Recco-Pimentel SM
FAU - Cardoso, A J
AU  - Cardoso AJ
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Netherlands
TA  - Chromosome Res
JT  - Chromosome research : an international journal on the molecular, supramolecular 
      and evolutionary aspects of chromosome biology
JID - 9313452
SB  - IM
MH  - Animals
MH  - Anura/*genetics
MH  - Chromosomes/genetics
MH  - Female
MH  - *In Situ Hybridization, Fluorescence
MH  - Interphase
MH  - Karyotyping
MH  - Male
MH  - Metaphase
MH  - Nucleolus Organizer Region/*genetics/ultrastructure
MH  - Polymorphism, Genetic/*genetics
MH  - *Silver Staining
EDAT- 1999/04/01 00:00
MHDA- 1999/04/01 00:01
CRDT- 1999/04/01 00:00
PHST- 1999/04/01 00:00 [pubmed]
PHST- 1999/04/01 00:01 [medline]
PHST- 1999/04/01 00:00 [entrez]
AID - 10.1023/a:1009253410553 [doi]
PST - ppublish
SO  - Chromosome Res. 1998 Dec;6(8):621-8. doi: 10.1023/a:1009253410553.