Karyotypic Diversity and Evolution in a Sympatric Assemblage of Neotropical Electric Knifefish

Chromosome changes can perform an important role in speciation by acting as post-zygotic reproductive barriers. The Neotropical electric fish genus (Gymnotiformes, Hypopomidae) has 28 described species, but cytogenetic data are hitherto available only for four of them. To understand karyotype evolut...

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Bibliographic Details
Published in:	Frontiers in genetics Vol. 9; p. 81
Main Authors:	Cardoso, Adauto L, Pieczarka, Julio C, Crampton, William G R, Ready, Jonathan S, de Figueiredo Ready, Wilsea M B, Waddell, Joseph C, de Oliveira, Jonas A, Nagamachi, Cleusa Y
Format:	Journal Article
Language:	English
Published:	Switzerland Frontiers Media S.A 19-03-2018
Subjects:	chromosome rearrangements DNA barcode Genetics karyotype evolution reproductive isolation sympatry karyotype evolution sympatry reproductive isolation DNA barcode chromosome rearrangements
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Summary:	Chromosome changes can perform an important role in speciation by acting as post-zygotic reproductive barriers. The Neotropical electric fish genus (Gymnotiformes, Hypopomidae) has 28 described species, but cytogenetic data are hitherto available only for four of them. To understand karyotype evolution and investigate the possible role of chromosome changes in the diversification of this genus, we describe here the karyotype of eight species of from a sympatric assemblage in the central Amazon basin. We analyzed cytogenetic data in the context of a phylogenetic reconstruction of the genus and known patterns of geographical distribution. We found a strong phylogenetic signal for chromosome number and noted that sympatric species have exclusive karyotypes. Additional insights into the role of chromosome changes in the diversification of are discussed.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 This article was submitted to Evolutionary and Population Genetics, a section of the journal Frontiers in Genetics Reviewed by: Nakatada Wachi, University of the Ryukyus, Japan; Yizhou Wang, Cedars-Sinai Medical Center, United States Edited by: Fulvio Cruciani, Sapienza Università di Roma, Italy
ISSN:	1664-8021 1664-8021
DOI:	10.3389/fgene.2018.00081