A hybrid zone of the genus Ctenomys: a case study in southern Brazil

Detalhes bibliográficos
Autor(a) principal: Castilho,Camila S.
Data de Publicação: 2012
Outros Autores: Gava,Adriana, Freitas,Thales R.O. de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Genetics and Molecular Biology
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600014
Resumo: We describe variation at microsatellite loci and the chromosomal polymorphisms of a hybrid population, and hybridizing populations of Ctenomys minutus (the minor tuco-tuco) from the coastal plain of Rio Grande do Sul, southern Brazil. Cytogenetic analysis and a survey of six microsatellite loci included 101 specimens of C. minutus from the parental populations (2n/AN = 42/74 and 48a/76) and their contact zone. Cytogenetic analysis recorded 26 different karyotypes exhibited by 50 individuals from the hybrid population. Of the 26 karyotypes, only 14% presented a parental-like configuration, and none had the combinations of 2n and AN expected for an F1 hybrid. The remaining karyotypes were alternative hybrid forms, with 2n varying from 42 to 46 and AN from 68 to 80. These results suggest chromosomal rearrangements are only of minor significance in the establishment of reproductive barriers for this species.
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spelling A hybrid zone of the genus Ctenomys: a case study in southern Brazilchromosome polymorphismsubterranean rodentkaryotypesmicrosatelliteWe describe variation at microsatellite loci and the chromosomal polymorphisms of a hybrid population, and hybridizing populations of Ctenomys minutus (the minor tuco-tuco) from the coastal plain of Rio Grande do Sul, southern Brazil. Cytogenetic analysis and a survey of six microsatellite loci included 101 specimens of C. minutus from the parental populations (2n/AN = 42/74 and 48a/76) and their contact zone. Cytogenetic analysis recorded 26 different karyotypes exhibited by 50 individuals from the hybrid population. Of the 26 karyotypes, only 14% presented a parental-like configuration, and none had the combinations of 2n and AN expected for an F1 hybrid. The remaining karyotypes were alternative hybrid forms, with 2n varying from 42 to 46 and AN from 68 to 80. These results suggest chromosomal rearrangements are only of minor significance in the establishment of reproductive barriers for this species.Sociedade Brasileira de Genética2012-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600014Genetics and Molecular Biology v.35 n.4 suppl.1 2012reponame:Genetics and Molecular Biologyinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/S1415-47572012000600014info:eu-repo/semantics/openAccessCastilho,Camila S.Gava,AdrianaFreitas,Thales R.O. deeng2012-12-18T00:00:00Zoai:scielo:S1415-47572012000600014Revistahttp://www.gmb.org.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||editor@gmb.org.br1678-46851415-4757opendoar:2012-12-18T00:00Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)false
dc.title.none.fl_str_mv A hybrid zone of the genus Ctenomys: a case study in southern Brazil
title A hybrid zone of the genus Ctenomys: a case study in southern Brazil
spellingShingle A hybrid zone of the genus Ctenomys: a case study in southern Brazil
Castilho,Camila S.
chromosome polymorphism
subterranean rodent
karyotypes
microsatellite
title_short A hybrid zone of the genus Ctenomys: a case study in southern Brazil
title_full A hybrid zone of the genus Ctenomys: a case study in southern Brazil
title_fullStr A hybrid zone of the genus Ctenomys: a case study in southern Brazil
title_full_unstemmed A hybrid zone of the genus Ctenomys: a case study in southern Brazil
title_sort A hybrid zone of the genus Ctenomys: a case study in southern Brazil
author Castilho,Camila S.
author_facet Castilho,Camila S.
Gava,Adriana
Freitas,Thales R.O. de
author_role author
author2 Gava,Adriana
Freitas,Thales R.O. de
author2_role author
author
dc.contributor.author.fl_str_mv Castilho,Camila S.
Gava,Adriana
Freitas,Thales R.O. de
dc.subject.por.fl_str_mv chromosome polymorphism
subterranean rodent
karyotypes
microsatellite
topic chromosome polymorphism
subterranean rodent
karyotypes
microsatellite
description We describe variation at microsatellite loci and the chromosomal polymorphisms of a hybrid population, and hybridizing populations of Ctenomys minutus (the minor tuco-tuco) from the coastal plain of Rio Grande do Sul, southern Brazil. Cytogenetic analysis and a survey of six microsatellite loci included 101 specimens of C. minutus from the parental populations (2n/AN = 42/74 and 48a/76) and their contact zone. Cytogenetic analysis recorded 26 different karyotypes exhibited by 50 individuals from the hybrid population. Of the 26 karyotypes, only 14% presented a parental-like configuration, and none had the combinations of 2n and AN expected for an F1 hybrid. The remaining karyotypes were alternative hybrid forms, with 2n varying from 42 to 46 and AN from 68 to 80. These results suggest chromosomal rearrangements are only of minor significance in the establishment of reproductive barriers for this species.
publishDate 2012
dc.date.none.fl_str_mv 2012-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600014
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600014
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1415-47572012000600014
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Genética
publisher.none.fl_str_mv Sociedade Brasileira de Genética
dc.source.none.fl_str_mv Genetics and Molecular Biology v.35 n.4 suppl.1 2012
reponame:Genetics and Molecular Biology
instname:Sociedade Brasileira de Genética (SBG)
instacron:SBG
instname_str Sociedade Brasileira de Genética (SBG)
instacron_str SBG
institution SBG
reponame_str Genetics and Molecular Biology
collection Genetics and Molecular Biology
repository.name.fl_str_mv Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)
repository.mail.fl_str_mv ||editor@gmb.org.br
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