Document Detail

Cytogenetic characterization of a supernumerary chromosome segment and of B-chromosomes in Astyanax scabripinnis (Teleostei, Characidae).
MedLine Citation:
PMID:  11678508     Owner:  NLM     Status:  MEDLINE    
The chromosome complement of a local population of Astyanax scabripinnis in Brazil was investigated with emphasis on the study of the heterochromatin attached to the A-chromosomes and present in the macro B-chromosome. Analysis after C-banding, silver and CMA3 staining, incorporation of 5-bromo-2'-deoxyuridine and chromosome digestion with nine restriction endonucleases revealed that the heterochromatin in the B-chromosomes was different from that found in the A-chromosomes. A polymorphism due to the presence of a supernumerary heterochromatic chromosome segment was observed in the population investigated. Some aspects related to the origin of the heterochromatin polymorphism in Astyanax scabripinnis are discussed.
E L Maistro; C Oliveira; F Foresti
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Genetica     Volume:  110     ISSN:  0016-6707     ISO Abbreviation:  Genetica     Publication Date:  2000  
Date Detail:
Created Date:  2001-10-25     Completed Date:  2001-12-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370740     Medline TA:  Genetica     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  177-83     Citation Subset:  IM    
Instituto de Farmácia e Nutrição, Universidade de Alfenas, MG, Brazil.
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MeSH Terms
Chromosomes / genetics*
Fishes / genetics*
Genetics, Population
Heterochromatin / genetics
Polymorphism, Genetic
Reg. No./Substance:

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