Document Detail

Speciation via introgressive hybridization in East African cichlids?
MedLine Citation:
PMID:  11918795     Owner:  NLM     Status:  MEDLINE    
Speciation caused by introgressive hybridization occurs frequently in plants but its importance remains controversial in animal evolution. Here we report a case of introgressive hybridization between two ancient and genetically distinct species of Lake Tanganyika cichlids that led to the formation of a new species. Neolamprologus marunguensis contains mtDNA haplotypes from both parental species varying on average by 12.4% in the first section of the control region and by 5.2% in a segment of the cytochrome b gene. All individuals have almost identical DNA sequences in the flanking regions of the single-copy nuclear DNA locus TmoM27, and show a mosaic of alleles derived from both parental lineages in six microsatellite loci. Hence, our finding displays another mode of speciation in cichlid fishes. The increase of genetic and phenotypic diversity due to hybridization may contribute to the uniquely rapid pace of speciation in cichlids.
W Salzburger; S Baric; C Sturmbauer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Molecular ecology     Volume:  11     ISSN:  0962-1083     ISO Abbreviation:  Mol. Ecol.     Publication Date:  2002 Mar 
Date Detail:
Created Date:  2002-03-28     Completed Date:  2002-05-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9214478     Medline TA:  Mol Ecol     Country:  England    
Other Details:
Languages:  eng     Pagination:  619-25     Citation Subset:  IM    
Department of Zoology and Limnology, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria.
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MeSH Terms
Cichlids / classification,  genetics*
Cytochrome b Group / genetics
DNA, Mitochondrial / analysis,  genetics
Hybridization, Genetic / genetics*
Microsatellite Repeats
Reg. No./Substance:
0/Cytochrome b Group; 0/DNA, Mitochondrial

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