Coexistence of cytotypes and chromosomal mosaicism in Hoplias malabaricus (Characiformes, Erythrinidae)

Karyotypes of seventeen Hoplias malabaricus specimens, collected in the fish culture station of UNOPAR (University of Northern Paraná), were analyzed. The station is in the Claro River system in the Tibagi River basin. Two distinct and coexistent karyotype forms (cytotypes) were identified, comprisi...

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Autores principales:	DA ROSA,RENATA, RUBERT,MARCELÉIA, BERTOLLO,LUIZ A C, MARTINS-SANTOS,ISABEL C, GIULIANO-CAETANO,LUCIA
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2009
Materias:	Hoplias malabaricus chromosomal mosaicism coexistence of cytotypes RAPD reproductive isolation
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000300003
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spelling	oai:scielo:S0716-976020090003000032009-11-02Coexistence of cytotypes and chromosomal mosaicism in Hoplias malabaricus (Characiformes, Erythrinidae)DA ROSA,RENATARUBERT,MARCELÉIABERTOLLO,LUIZ A CMARTINS-SANTOS,ISABEL CGIULIANO-CAETANO,LUCIA Hoplias malabaricus chromosomal mosaicism coexistence of cytotypes RAPD reproductive isolation Karyotypes of seventeen Hoplias malabaricus specimens, collected in the fish culture station of UNOPAR (University of Northern Paraná), were analyzed. The station is in the Claro River system in the Tibagi River basin. Two distinct and coexistent karyotype forms (cytotypes) were identified, comprising either 42 chromosomes (cytotype A) or 40 chromosomes (cytotype C), both presenting metacentric and submetacentric chromosomes. In two specimens, one male and one female, it was not possible to characterize a modal diploid number because different cell lines were observed, with a predominance of 2n=41 and 2n=42 chromosomes at a frequency of 38.24% and 41.12%, respectively. The karyotype with 2n=41 showed some putative monosomic and trisomic chromosomes, while the karyotype with 2n=42 showed 21 chromosomal pairs, similar to cytotype A. RAPD analysis showed that these two specimens have the same band pro file of cytotype A (Nei's genetic identity=92%), discarding a possible hybridization between both cytotypes and supporting the mosaicism hypothesis. These findings corroborate the isolation between cytotypes A and C.info:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.42 n.3 20092009-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000300003en10.4067/S0716-97602009000300003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Hoplias malabaricus chromosomal mosaicism coexistence of cytotypes RAPD reproductive isolation
spellingShingle	Hoplias malabaricus chromosomal mosaicism coexistence of cytotypes RAPD reproductive isolation DA ROSA,RENATA RUBERT,MARCELÉIA BERTOLLO,LUIZ A C MARTINS-SANTOS,ISABEL C GIULIANO-CAETANO,LUCIA Coexistence of cytotypes and chromosomal mosaicism in Hoplias malabaricus (Characiformes, Erythrinidae)
description	Karyotypes of seventeen Hoplias malabaricus specimens, collected in the fish culture station of UNOPAR (University of Northern Paraná), were analyzed. The station is in the Claro River system in the Tibagi River basin. Two distinct and coexistent karyotype forms (cytotypes) were identified, comprising either 42 chromosomes (cytotype A) or 40 chromosomes (cytotype C), both presenting metacentric and submetacentric chromosomes. In two specimens, one male and one female, it was not possible to characterize a modal diploid number because different cell lines were observed, with a predominance of 2n=41 and 2n=42 chromosomes at a frequency of 38.24% and 41.12%, respectively. The karyotype with 2n=41 showed some putative monosomic and trisomic chromosomes, while the karyotype with 2n=42 showed 21 chromosomal pairs, similar to cytotype A. RAPD analysis showed that these two specimens have the same band pro file of cytotype A (Nei's genetic identity=92%), discarding a possible hybridization between both cytotypes and supporting the mosaicism hypothesis. These findings corroborate the isolation between cytotypes A and C.
author	DA ROSA,RENATA RUBERT,MARCELÉIA BERTOLLO,LUIZ A C MARTINS-SANTOS,ISABEL C GIULIANO-CAETANO,LUCIA
author_facet	DA ROSA,RENATA RUBERT,MARCELÉIA BERTOLLO,LUIZ A C MARTINS-SANTOS,ISABEL C GIULIANO-CAETANO,LUCIA
author_sort	DA ROSA,RENATA
title	Coexistence of cytotypes and chromosomal mosaicism in Hoplias malabaricus (Characiformes, Erythrinidae)
title_short	Coexistence of cytotypes and chromosomal mosaicism in Hoplias malabaricus (Characiformes, Erythrinidae)
title_full	Coexistence of cytotypes and chromosomal mosaicism in Hoplias malabaricus (Characiformes, Erythrinidae)
title_fullStr	Coexistence of cytotypes and chromosomal mosaicism in Hoplias malabaricus (Characiformes, Erythrinidae)
title_full_unstemmed	Coexistence of cytotypes and chromosomal mosaicism in Hoplias malabaricus (Characiformes, Erythrinidae)
title_sort	coexistence of cytotypes and chromosomal mosaicism in hoplias malabaricus (characiformes, erythrinidae)
publisher	Sociedad de Biología de Chile
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000300003
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Coexistence of cytotypes and chromosomal mosaicism in Hoplias malabaricus (Characiformes, Erythrinidae)

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