Document Detail

Chromosome evolution in African cichlid fish: contributions from the physical mapping of repeated DNAs.
MedLine Citation:
PMID:  20606399     Owner:  NLM     Status:  MEDLINE    
Cichlid fishes have been the subject of increasing scientific interest because of their rapid adaptive radiation that has led to extensive ecological diversity and because of their enormous importance to tropical and subtropical aquaculture. To further understanding of chromosome evolution among cichlid species, we have comparatively mapped the SATA satellite DNA, the transposable element ROn-1, and repeated sequences in the bacterial artificial chromosome clone BAC-C4E09 on the chromosomes of a range of African species of Cichlidae, using fluorescence in situ hybridization. The SATA satellite DNA was mapped in almost all the centromeres of all tilapiine and haplochromine species studied. The maintenance and centromeric distribution of the SATA satellite DNA in African cichlids suggest that this sequence plays an important role in the organization and function of the centromere in these species. Furthermore, analysis of SATA element distribution clarifies that chromosome fusions occurred independently in Oreochromis and Tilapia genera, and led to the reduced chromosome number detected in O. karongae and T. mariae. The comparative chromosome mapping of the ROn-1 SINE-like element and BAC-C4E09 shows that the repeated sequences have been maintained among tilapiine, haplochromine and hemichromine fishes and has demonstrated the homology of the largest chromosomes among these groups. Furthermore, the mapping of ROn-1 suggested that different chromosomal rearrangements could have occurred in the origin of the largest chromosome pairs of tilapiines and non-tilapiines.
I A Ferreira; A B Poletto; T D Kocher; J C Mota-Velasco; D J Penman; C Martins
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2010-07-06
Journal Detail:
Title:  Cytogenetic and genome research     Volume:  129     ISSN:  1424-859X     ISO Abbreviation:  Cytogenet. Genome Res.     Publication Date:  2010  
Date Detail:
Created Date:  2010-08-17     Completed Date:  2010-09-08     Revised Date:  2014-09-17    
Medline Journal Info:
Nlm Unique ID:  101142708     Medline TA:  Cytogenet Genome Res     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  314-22     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2010 S. Karger AG, Basel.
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MeSH Terms
Cichlids / genetics*
DNA / genetics*
Evolution, Molecular*
Physical Chromosome Mapping
Repetitive Sequences, Nucleic Acid*
Grant Support
Reg. No./Substance:

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