Skull shape and size variation within and between mendocinus and torquatus groups in the genus Ctenomys (Rodentia: Ctenomyidae) in chromosomal polymorphism context
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/183935 |
Resumo: | We tested the association between chromosomal polymorphism and skull shape and size variation in two groups of the subterranean rodent Ctenomys. The hypothesis is based on the premise that chromosomal rearrangements in small populations, as it occurs in Ctenomys, produce reproductive isolation and allow the independent diversification of populations. The mendocinus group has species with low chromosomal diploid number variation (2n=46-48), while species from the torquatus group have a higher karyotype variation (2n=42-70). We analyzed the shape and size variation of skull and mandible by a geometric morphometric approach, with univariate and multivariate statistical analysis in 12 species from mendocinus and torquatus groups of the genus Ctenomys.We used 763 adult skulls in dorsal, ventral, and lateral views, and 515 mandibles in lateral view and 93 landmarks in four views. Although we expected more phenotypic variation in the torquatus than the mendocinus group, our results rejected the hypothesis of an association between chromosomal polymorphism and skull shape and size variation. Moreover, the torquatus group did not show more variation than mendocinus. Habitat heterogeneity associated to biomechanical constraints and other factors like geography, phylogeny, and demography, may affect skull morphological evolution in Ctenomys. |
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Fornel, RodrigoPinto, Pedro Cordeiro Estrela de AndradeFreitas, Thales Renato Ochotorena de2018-10-24T02:43:46Z20181415-4757http://hdl.handle.net/10183/183935001073369We tested the association between chromosomal polymorphism and skull shape and size variation in two groups of the subterranean rodent Ctenomys. The hypothesis is based on the premise that chromosomal rearrangements in small populations, as it occurs in Ctenomys, produce reproductive isolation and allow the independent diversification of populations. The mendocinus group has species with low chromosomal diploid number variation (2n=46-48), while species from the torquatus group have a higher karyotype variation (2n=42-70). We analyzed the shape and size variation of skull and mandible by a geometric morphometric approach, with univariate and multivariate statistical analysis in 12 species from mendocinus and torquatus groups of the genus Ctenomys.We used 763 adult skulls in dorsal, ventral, and lateral views, and 515 mandibles in lateral view and 93 landmarks in four views. Although we expected more phenotypic variation in the torquatus than the mendocinus group, our results rejected the hypothesis of an association between chromosomal polymorphism and skull shape and size variation. Moreover, the torquatus group did not show more variation than mendocinus. Habitat heterogeneity associated to biomechanical constraints and other factors like geography, phylogeny, and demography, may affect skull morphological evolution in Ctenomys.application/pdfengGenetics and molecular biology. Ribeirão Preto, SP. Vol. 41, no. 1 suppl 1 (mar. 2018), p. 263-272.CtenomysPolimorfismo cromossômicoMorfometria geométricaFenótipoCraniumGeometric morphometricsPhenotypic evolutionSubterranean rodentSkull shape and size variation within and between mendocinus and torquatus groups in the genus Ctenomys (Rodentia: Ctenomyidae) in chromosomal polymorphism contextinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL001073369.pdfTexto completo (inglês)application/pdf2524480http://www.lume.ufrgs.br/bitstream/10183/183935/1/001073369.pdf94be9e34665a6fa4be4c64e559e37ec1MD51TEXT001073369.pdf.txt001073369.pdf.txtExtracted Texttext/plain38356http://www.lume.ufrgs.br/bitstream/10183/183935/2/001073369.pdf.txtb04632d70ba693249361e37eaab38f04MD52THUMBNAIL001073369.pdf.jpg001073369.pdf.jpgGenerated Thumbnailimage/jpeg1796http://www.lume.ufrgs.br/bitstream/10183/183935/3/001073369.pdf.jpgde56ed326caecb46509ab845c80f7fd9MD5310183/1839352023-06-14 03:29:45.971891oai:www.lume.ufrgs.br:10183/183935Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-06-14T06:29:45Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Skull shape and size variation within and between mendocinus and torquatus groups in the genus Ctenomys (Rodentia: Ctenomyidae) in chromosomal polymorphism context |
title |
Skull shape and size variation within and between mendocinus and torquatus groups in the genus Ctenomys (Rodentia: Ctenomyidae) in chromosomal polymorphism context |
spellingShingle |
Skull shape and size variation within and between mendocinus and torquatus groups in the genus Ctenomys (Rodentia: Ctenomyidae) in chromosomal polymorphism context Fornel, Rodrigo Ctenomys Polimorfismo cromossômico Morfometria geométrica Fenótipo Cranium Geometric morphometrics Phenotypic evolution Subterranean rodent |
title_short |
Skull shape and size variation within and between mendocinus and torquatus groups in the genus Ctenomys (Rodentia: Ctenomyidae) in chromosomal polymorphism context |
title_full |
Skull shape and size variation within and between mendocinus and torquatus groups in the genus Ctenomys (Rodentia: Ctenomyidae) in chromosomal polymorphism context |
title_fullStr |
Skull shape and size variation within and between mendocinus and torquatus groups in the genus Ctenomys (Rodentia: Ctenomyidae) in chromosomal polymorphism context |
title_full_unstemmed |
Skull shape and size variation within and between mendocinus and torquatus groups in the genus Ctenomys (Rodentia: Ctenomyidae) in chromosomal polymorphism context |
title_sort |
Skull shape and size variation within and between mendocinus and torquatus groups in the genus Ctenomys (Rodentia: Ctenomyidae) in chromosomal polymorphism context |
author |
Fornel, Rodrigo |
author_facet |
Fornel, Rodrigo Pinto, Pedro Cordeiro Estrela de Andrade Freitas, Thales Renato Ochotorena de |
author_role |
author |
author2 |
Pinto, Pedro Cordeiro Estrela de Andrade Freitas, Thales Renato Ochotorena de |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Fornel, Rodrigo Pinto, Pedro Cordeiro Estrela de Andrade Freitas, Thales Renato Ochotorena de |
dc.subject.por.fl_str_mv |
Ctenomys Polimorfismo cromossômico Morfometria geométrica Fenótipo |
topic |
Ctenomys Polimorfismo cromossômico Morfometria geométrica Fenótipo Cranium Geometric morphometrics Phenotypic evolution Subterranean rodent |
dc.subject.eng.fl_str_mv |
Cranium Geometric morphometrics Phenotypic evolution Subterranean rodent |
description |
We tested the association between chromosomal polymorphism and skull shape and size variation in two groups of the subterranean rodent Ctenomys. The hypothesis is based on the premise that chromosomal rearrangements in small populations, as it occurs in Ctenomys, produce reproductive isolation and allow the independent diversification of populations. The mendocinus group has species with low chromosomal diploid number variation (2n=46-48), while species from the torquatus group have a higher karyotype variation (2n=42-70). We analyzed the shape and size variation of skull and mandible by a geometric morphometric approach, with univariate and multivariate statistical analysis in 12 species from mendocinus and torquatus groups of the genus Ctenomys.We used 763 adult skulls in dorsal, ventral, and lateral views, and 515 mandibles in lateral view and 93 landmarks in four views. Although we expected more phenotypic variation in the torquatus than the mendocinus group, our results rejected the hypothesis of an association between chromosomal polymorphism and skull shape and size variation. Moreover, the torquatus group did not show more variation than mendocinus. Habitat heterogeneity associated to biomechanical constraints and other factors like geography, phylogeny, and demography, may affect skull morphological evolution in Ctenomys. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-10-24T02:43:46Z |
dc.date.issued.fl_str_mv |
2018 |
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info:eu-repo/semantics/article info:eu-repo/semantics/other |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/183935 |
dc.identifier.issn.pt_BR.fl_str_mv |
1415-4757 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001073369 |
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1415-4757 001073369 |
url |
http://hdl.handle.net/10183/183935 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Genetics and molecular biology. Ribeirão Preto, SP. Vol. 41, no. 1 suppl 1 (mar. 2018), p. 263-272. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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