Sequential Steps of Chromosomal Differentiation in Atlantic Surgeonfishes: Evolutionary Inferences
Joint Authors
Molina, Wagner Franco
Affonso, Paulo Roberto Antunes de Mello
Fernandes, Maria Aparecida
Almeida, Josivanda Santos
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-08-12
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Medicine
Information Technology and Computer Science
Abstract EN
Surgeonfishes are a species-rich group and a major biomass on coral reefs.
Three species are commonly found throughout South Atlantic, Acanthurus bahianus, A.
chirurgus, and A.
coeruleus.
In this paper, we present the first cytogenetic data of these species, revealing a sequential chromosomal diversification.
A.
coeruleus was characterized by a relatively conserved karyotype evolved by pericentric inversions of some pairs ( 2 n = 48 , 2sm + 4st + 42a).
In contrast, the karyotypes of A.
bahianus ( 2 n = 36 ) and A.
chirurgus ( 2 n = 34 ) were highly differentiated by the presence of six large metacentric pairs in A.
bahianus (12m + 2sm + 4st + 18a) and A.
chirurgus (12m + 2sm + 4st +1 6a) probably derived by chromosomal fusions that corroborate their closer relationship.
A discernible in tandem fusion represents an autapomorphic character to A.
chirurgus.
In spite of macrostructure variation, single nucleolar organizer regions (NORs) on short arms of a subtelocentric pair and similar distribution of C-bands were observed in the three species.
Overlapping of chromosomal data with molecular phylogeny indicated pericentric inversions which took place nearly at 19 Ma while centric fusions are as recent as 5 Ma.
A physical mapping of coding and noncoding sequences in Acanthurus could clarify the role of additional rearrangements during their chromosomal evolution.
American Psychological Association (APA)
Affonso, Paulo Roberto Antunes de Mello& Fernandes, Maria Aparecida& Almeida, Josivanda Santos& Molina, Wagner Franco. 2014. Sequential Steps of Chromosomal Differentiation in Atlantic Surgeonfishes: Evolutionary Inferences. The Scientific World Journal،Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1051216
Modern Language Association (MLA)
Affonso, Paulo Roberto Antunes de Mello…[et al.]. Sequential Steps of Chromosomal Differentiation in Atlantic Surgeonfishes: Evolutionary Inferences. The Scientific World Journal No. 2014 (2014), pp.1-7.
https://search.emarefa.net/detail/BIM-1051216
American Medical Association (AMA)
Affonso, Paulo Roberto Antunes de Mello& Fernandes, Maria Aparecida& Almeida, Josivanda Santos& Molina, Wagner Franco. Sequential Steps of Chromosomal Differentiation in Atlantic Surgeonfishes: Evolutionary Inferences. The Scientific World Journal. 2014. Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1051216
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1051216