Sequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizards
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/87772 |
Resumo: | In reptiles, dorsal body darkness often varies with substrate color or temperature environment, and is generally presumed to be an adaptation for crypsis or thermoregulation. However, the genetic basis of pigmentation is poorly known in this group. In this study we analyzed the coding region of the melanocortin-1-receptor (MC1R) gene, and therefore its role underlying the dorsal color variation in two sympatric species of sand lizards (Liolaemus) that inhabit the southeastern coast of South America: L. occipitalis and L. arambarensis. The first is light-colored and occupies aeolic pale sand dunes, while the second is brownish and lives in a darker sandy habitat. We sequenced 630 base pairs of MC1R in both species. In total, 12 nucleotide polymorphisms were observed, and four amino acid replacement sites, but none of them could be associated with a color pattern. Comparative analysis indicated that these taxa are monomorphic for amino acid sites that were previously identified as functionally important in other reptiles. Thus, our results indicate that MC1R is not involved in the pigmentation pattern observed in Liolaemus lizards. Therefore, structural differences in other genes, such as ASIP, or variation in regulatory regions of MC1R may be responsible for this variation. Alternatively, the phenotypic differences observed might be a consequence of non-genetic factors, such as thermoregulatory mechanisms. |
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Corso, JosmaelGonçalves, Gislene LopesFreitas, Thales Renato Ochotorena de2014-02-26T01:51:51Z20121415-4757http://hdl.handle.net/10183/87772000857100In reptiles, dorsal body darkness often varies with substrate color or temperature environment, and is generally presumed to be an adaptation for crypsis or thermoregulation. However, the genetic basis of pigmentation is poorly known in this group. In this study we analyzed the coding region of the melanocortin-1-receptor (MC1R) gene, and therefore its role underlying the dorsal color variation in two sympatric species of sand lizards (Liolaemus) that inhabit the southeastern coast of South America: L. occipitalis and L. arambarensis. The first is light-colored and occupies aeolic pale sand dunes, while the second is brownish and lives in a darker sandy habitat. We sequenced 630 base pairs of MC1R in both species. In total, 12 nucleotide polymorphisms were observed, and four amino acid replacement sites, but none of them could be associated with a color pattern. Comparative analysis indicated that these taxa are monomorphic for amino acid sites that were previously identified as functionally important in other reptiles. Thus, our results indicate that MC1R is not involved in the pigmentation pattern observed in Liolaemus lizards. Therefore, structural differences in other genes, such as ASIP, or variation in regulatory regions of MC1R may be responsible for this variation. Alternatively, the phenotypic differences observed might be a consequence of non-genetic factors, such as thermoregulatory mechanisms.application/pdfengGenetics and molecular biology. Ribeirão Preto. Vol. 35, no. 1 (mar. 2012), p. 81-87PigmentacaoAdaptaçãoadaptationbody colorcrypsisLiolaemidaepigmentation genesSequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizardsinfo: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:UFRGSORIGINAL000857100.pdf000857100.pdfTesto completoapplication/pdf1601937http://www.lume.ufrgs.br/bitstream/10183/87772/1/000857100.pdfa6306f7add53ce98c3f02e7017839426MD51TEXT000857100.pdf.txt000857100.pdf.txtExtracted Texttext/plain31321http://www.lume.ufrgs.br/bitstream/10183/87772/2/000857100.pdf.txt944f5fc6f52ae55d3c4ddbb431361ca2MD52THUMBNAIL000857100.pdf.jpg000857100.pdf.jpgGenerated Thumbnailimage/jpeg1876http://www.lume.ufrgs.br/bitstream/10183/87772/3/000857100.pdf.jpg6b5cbe18574d287cf1a48b8a0cf313c0MD5310183/877722018-10-18 08:08:33.569oai:www.lume.ufrgs.br:10183/87772Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-18T11:08:33Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Sequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizards |
title |
Sequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizards |
spellingShingle |
Sequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizards Corso, Josmael Pigmentacao Adaptação adaptation body color crypsis Liolaemidae pigmentation genes |
title_short |
Sequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizards |
title_full |
Sequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizards |
title_fullStr |
Sequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizards |
title_full_unstemmed |
Sequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizards |
title_sort |
Sequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizards |
author |
Corso, Josmael |
author_facet |
Corso, Josmael Gonçalves, Gislene Lopes Freitas, Thales Renato Ochotorena de |
author_role |
author |
author2 |
Gonçalves, Gislene Lopes Freitas, Thales Renato Ochotorena de |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Corso, Josmael Gonçalves, Gislene Lopes Freitas, Thales Renato Ochotorena de |
dc.subject.por.fl_str_mv |
Pigmentacao Adaptação |
topic |
Pigmentacao Adaptação adaptation body color crypsis Liolaemidae pigmentation genes |
dc.subject.eng.fl_str_mv |
adaptation body color crypsis Liolaemidae pigmentation genes |
description |
In reptiles, dorsal body darkness often varies with substrate color or temperature environment, and is generally presumed to be an adaptation for crypsis or thermoregulation. However, the genetic basis of pigmentation is poorly known in this group. In this study we analyzed the coding region of the melanocortin-1-receptor (MC1R) gene, and therefore its role underlying the dorsal color variation in two sympatric species of sand lizards (Liolaemus) that inhabit the southeastern coast of South America: L. occipitalis and L. arambarensis. The first is light-colored and occupies aeolic pale sand dunes, while the second is brownish and lives in a darker sandy habitat. We sequenced 630 base pairs of MC1R in both species. In total, 12 nucleotide polymorphisms were observed, and four amino acid replacement sites, but none of them could be associated with a color pattern. Comparative analysis indicated that these taxa are monomorphic for amino acid sites that were previously identified as functionally important in other reptiles. Thus, our results indicate that MC1R is not involved in the pigmentation pattern observed in Liolaemus lizards. Therefore, structural differences in other genes, such as ASIP, or variation in regulatory regions of MC1R may be responsible for this variation. Alternatively, the phenotypic differences observed might be a consequence of non-genetic factors, such as thermoregulatory mechanisms. |
publishDate |
2012 |
dc.date.issued.fl_str_mv |
2012 |
dc.date.accessioned.fl_str_mv |
2014-02-26T01:51:51Z |
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http://hdl.handle.net/10183/87772 |
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1415-4757 |
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000857100 |
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http://hdl.handle.net/10183/87772 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Genetics and molecular biology. Ribeirão Preto. Vol. 35, no. 1 (mar. 2012), p. 81-87 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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