Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/10303 |
Resumo: | The species Stryphnodendron adstringens (barbatimão) is considered a valuable genetic resource of the Brazilian Cerrado, mainly due to its medicinal properties. It has been exploited in an extractive manner in its natural habitat, requiring studies of conservation and management plans. Species of this genus had recent diversification in the Cerrado, becoming interesting models for evaluating intraspecific genetic patterns in the biome. In this context, the objective of this work was to evaluate the phylogeographic patterns of S. adstringens, in order to infer about the hypotheses of diversification of their lineages in time and space. Beyond to measure the impact of future climate changes on the geographic distribution of the genetic variation of this species. For this, the DNA polymorphism of chloroplastid (psbA-trnH and trnL-F) and nuclear (ETS) regions was quantified in individuals from 17 localities in the Cerrado. Haplotype and nucleotide diversity levels were evaluated to verify the population genetic differentiation. Coalescence analyses were performed to estimate historical demographic parameters and to identify divergence time among populations of S. adstringens. The environmental suitability of S. adstringens in the past, present and historical refuge was used to identify spatial patterns on population genetic diversity. Current and future genetic clusters were simulated from climatic scenarios. Low genetic diversity was found for cpDNA and ETS and the geographical distribution of haplotypes reflects an incomplete lineage sort. There are discordant patterns of interpopulation genetic differentiation between regions of the genome, with greater effect for cpDNA. Historical demographic equilibrium was evidenced for S. adstringens, contrary by ENM, indicating retraction of range. Most recent common ancestor was dated to 1.7 Ma ago, dividing into two main clades with most of the diversification events dating to the Middle Pleistocene. The spatial structure is stronger for ETS, suggesting the existence of isolation by distance and environmental isolation due to temperature variations. Populations closer to the edge of the historic refuge have greater genetic diversity that can be associated with multiple historical refuges and ecological transition from forest to savanna environments. Genetic clusters modeled under current and future climatic conditions, indicate losses and homogenization of genetic variation for the species. The data corroborate the recent population diversification of S. adstringens in the Cerrado, reinforcing the phylogenetic pattern in species of this genus. Beyond, low levels of genetic diversity, reflecting the effects of glacial and interglacial periods in the Pleistocene, suggesting multiple refuges formation. The impact of climate change and the disorderly exploitation of the natural populations of this genetic resource indicate the need for management and conservation plans of the species. |
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Telles, Mariana Pires de Camposhttp://lattes.cnpq.br/4648436798023532Telles, Mariana Pires de CamposJardim, Tatianne Piza Ferrari AbreuChaves, Lázaro JoséLima, Jacqueline de SouzaPinto, Rafael Barbosahttp://lattes.cnpq.br/6300428213623066Braga, Ramilla dos Santos2020-01-17T12:06:58Z2019-09-27BRAGA, R. S. Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas. 2019. 101 f. Tese (Doutorado em Genética e Melhoramento de Plantas) - Universidade Federal de Goiás, Goiânia, 2019.http://repositorio.bc.ufg.br/tede/handle/tede/10303ark:/38995/0013000009b76The species Stryphnodendron adstringens (barbatimão) is considered a valuable genetic resource of the Brazilian Cerrado, mainly due to its medicinal properties. It has been exploited in an extractive manner in its natural habitat, requiring studies of conservation and management plans. Species of this genus had recent diversification in the Cerrado, becoming interesting models for evaluating intraspecific genetic patterns in the biome. In this context, the objective of this work was to evaluate the phylogeographic patterns of S. adstringens, in order to infer about the hypotheses of diversification of their lineages in time and space. Beyond to measure the impact of future climate changes on the geographic distribution of the genetic variation of this species. For this, the DNA polymorphism of chloroplastid (psbA-trnH and trnL-F) and nuclear (ETS) regions was quantified in individuals from 17 localities in the Cerrado. Haplotype and nucleotide diversity levels were evaluated to verify the population genetic differentiation. Coalescence analyses were performed to estimate historical demographic parameters and to identify divergence time among populations of S. adstringens. The environmental suitability of S. adstringens in the past, present and historical refuge was used to identify spatial patterns on population genetic diversity. Current and future genetic clusters were simulated from climatic scenarios. Low genetic diversity was found for cpDNA and ETS and the geographical distribution of haplotypes reflects an incomplete lineage sort. There are discordant patterns of interpopulation genetic differentiation between regions of the genome, with greater effect for cpDNA. Historical demographic equilibrium was evidenced for S. adstringens, contrary by ENM, indicating retraction of range. Most recent common ancestor was dated to 1.7 Ma ago, dividing into two main clades with most of the diversification events dating to the Middle Pleistocene. The spatial structure is stronger for ETS, suggesting the existence of isolation by distance and environmental isolation due to temperature variations. Populations closer to the edge of the historic refuge have greater genetic diversity that can be associated with multiple historical refuges and ecological transition from forest to savanna environments. Genetic clusters modeled under current and future climatic conditions, indicate losses and homogenization of genetic variation for the species. The data corroborate the recent population diversification of S. adstringens in the Cerrado, reinforcing the phylogenetic pattern in species of this genus. Beyond, low levels of genetic diversity, reflecting the effects of glacial and interglacial periods in the Pleistocene, suggesting multiple refuges formation. The impact of climate change and the disorderly exploitation of the natural populations of this genetic resource indicate the need for management and conservation plans of the species.A espécie Stryphnodendron adstringens (barbatimão) é considerada um recurso genético valioso do Cerrado brasileiro, principalmente em função de suas propriedades medicinais. As populações naturais desta espécie carecem de estudos de planos de manejo, devido à fragmentação do Cerrado, visando propor estratégias de conservação. Espécies deste gênero tiveram diversificação recente no Cerrado, tornando-se bons modelos para avaliar padrões genéticos intraespecíficos no bioma. Nesse contexto, o objetivo deste trabalho foi avaliar os padrões filogeográficos de S. adstringens, a fim de inferir sobre as hipóteses de diversificação de suas linhagens no tempo e espaço. Além disso, mensurar o impacto de mudanças climáticas futuras na distribuição geográfica e na variação genética desta espécie. Para tanto, o polimorfismo no DNA de regiões cloroplastidiais (psbA-trnH e trnL-F) e nuclear (ETS) foi quantificado em indivíduos de 17 localidades no Cerrado. Foram estimados os níveis de diversidade haplotípica e nucleotídica para verificar a diferenciação genética populacional. Por meio de análises de coalescência foram estimados parâmetros demográficos históricos e o tempo de divergência entre as populações de S. adstringens. A adequabilidade ambiental de S. adstringens no passado, presente e refúgio histórico foi usada para identificar padrões espaciais sobre a diversidade genética populacional. Grupos genéticos atuais e futuros foram simulados a partir de cenários climáticos. Foi encontrada uma baixa diversidade genética para cpDNA e ETS e a distribuição geográfica dos haplótipos reflete um padrão de arranjo incompleto de linhagens. Há padrões discordantes de estrutura genética interpopulacional entre as regiões do genoma, com maior efeito para cpDNA. Equilíbrio demográfico histórico foi evidenciado para S. adstringens, ao contrário do encontrado por ENM, indicando retração de áreas de ocorrência geográfica. O ancestral comum mais recente foi datado em 1,7 Ma atrás, dividindo em dois clados principais e a maioria dos eventos de diversificação datando no Pleistoceno Médio. A estrutura espacial é mais forte para ETS, sugerindo a existência de isolamento por distância e isolamento ambiental, devido variações de temperatura. Populações mais próximas da borda do refúgio histórico detêm maior diversidade genética que podem ser associadas a múltiplos refúgios históricos e transição ecológica de ambientes florestais para savânicos. Os grupos genéticos, modelados sob as condições climáticas atuais e futuras, apontam perdas e homogeneização da variação genética para a espécie. Os dados encontrados corroboram com a diversificação populacional recente de S. adstringens, reforçando o padrão filogenético em espécies deste gênero no Cerrado. Além disso, os baixos níveis de diversidade genética refletem os efeitos dos períodos glaciais e interglaciais no Pleistoceno, sugerindo a formação de múltiplos refúgios. O impacto das mudanças climáticas e o uso inadequado das populações naturais deste recurso genético indicam a necessidade de planos de manejo e conservação para a espécie.Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2020-01-16T12:15:12Z No. of bitstreams: 2 Tese - Ramilla dos Santos Braga - 2019.pdf: 5700625 bytes, checksum: 08809d25ab3e0639fccb53f40c840870 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2020-01-17T12:06:58Z (GMT) No. of bitstreams: 2 Tese - Ramilla dos Santos Braga - 2019.pdf: 5700625 bytes, checksum: 08809d25ab3e0639fccb53f40c840870 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2020-01-17T12:06:58Z (GMT). No. of bitstreams: 2 Tese - Ramilla dos Santos Braga - 2019.pdf: 5700625 bytes, checksum: 08809d25ab3e0639fccb53f40c840870 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2019-09-27Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfporUniversidade Federal de GoiásPrograma de Pós-graduação em Genética e Melhoramento de Plantas (EA)UFGBrasilEscola de Agronomia - EA (RG)http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessBarbatimãoCenários climáticosCoalescênciaFilogeografiaRecursos genéticosBarbatimãoClimate changesCoalescenceGenetic resourcesPhylogeographyGENETICA::GENETICA VEGETALDiversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticasRecent diversification and radiation of Stryphnodendron adstringens (Leguminosae) in the cerrado: genetic consequences of climate changeinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis-6265679607231828330600600600600-6046953723502374070-73979202484192807162075167498588264571reponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGLICENSElicense.txtlicense.txttext/plain; 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dc.title.eng.fl_str_mv |
Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas |
dc.title.alternative.eng.fl_str_mv |
Recent diversification and radiation of Stryphnodendron adstringens (Leguminosae) in the cerrado: genetic consequences of climate change |
title |
Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas |
spellingShingle |
Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas Braga, Ramilla dos Santos Barbatimão Cenários climáticos Coalescência Filogeografia Recursos genéticos Barbatimão Climate changes Coalescence Genetic resources Phylogeography GENETICA::GENETICA VEGETAL |
title_short |
Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas |
title_full |
Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas |
title_fullStr |
Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas |
title_full_unstemmed |
Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas |
title_sort |
Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas |
author |
Braga, Ramilla dos Santos |
author_facet |
Braga, Ramilla dos Santos |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Telles, Mariana Pires de Campos |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/4648436798023532 |
dc.contributor.referee1.fl_str_mv |
Telles, Mariana Pires de Campos |
dc.contributor.referee2.fl_str_mv |
Jardim, Tatianne Piza Ferrari Abreu |
dc.contributor.referee3.fl_str_mv |
Chaves, Lázaro José |
dc.contributor.referee4.fl_str_mv |
Lima, Jacqueline de Souza |
dc.contributor.referee5.fl_str_mv |
Pinto, Rafael Barbosa |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/6300428213623066 |
dc.contributor.author.fl_str_mv |
Braga, Ramilla dos Santos |
contributor_str_mv |
Telles, Mariana Pires de Campos Telles, Mariana Pires de Campos Jardim, Tatianne Piza Ferrari Abreu Chaves, Lázaro José Lima, Jacqueline de Souza Pinto, Rafael Barbosa |
dc.subject.por.fl_str_mv |
Barbatimão Cenários climáticos Coalescência Filogeografia Recursos genéticos |
topic |
Barbatimão Cenários climáticos Coalescência Filogeografia Recursos genéticos Barbatimão Climate changes Coalescence Genetic resources Phylogeography GENETICA::GENETICA VEGETAL |
dc.subject.eng.fl_str_mv |
Barbatimão Climate changes Coalescence Genetic resources Phylogeography |
dc.subject.cnpq.fl_str_mv |
GENETICA::GENETICA VEGETAL |
description |
The species Stryphnodendron adstringens (barbatimão) is considered a valuable genetic resource of the Brazilian Cerrado, mainly due to its medicinal properties. It has been exploited in an extractive manner in its natural habitat, requiring studies of conservation and management plans. Species of this genus had recent diversification in the Cerrado, becoming interesting models for evaluating intraspecific genetic patterns in the biome. In this context, the objective of this work was to evaluate the phylogeographic patterns of S. adstringens, in order to infer about the hypotheses of diversification of their lineages in time and space. Beyond to measure the impact of future climate changes on the geographic distribution of the genetic variation of this species. For this, the DNA polymorphism of chloroplastid (psbA-trnH and trnL-F) and nuclear (ETS) regions was quantified in individuals from 17 localities in the Cerrado. Haplotype and nucleotide diversity levels were evaluated to verify the population genetic differentiation. Coalescence analyses were performed to estimate historical demographic parameters and to identify divergence time among populations of S. adstringens. The environmental suitability of S. adstringens in the past, present and historical refuge was used to identify spatial patterns on population genetic diversity. Current and future genetic clusters were simulated from climatic scenarios. Low genetic diversity was found for cpDNA and ETS and the geographical distribution of haplotypes reflects an incomplete lineage sort. There are discordant patterns of interpopulation genetic differentiation between regions of the genome, with greater effect for cpDNA. Historical demographic equilibrium was evidenced for S. adstringens, contrary by ENM, indicating retraction of range. Most recent common ancestor was dated to 1.7 Ma ago, dividing into two main clades with most of the diversification events dating to the Middle Pleistocene. The spatial structure is stronger for ETS, suggesting the existence of isolation by distance and environmental isolation due to temperature variations. Populations closer to the edge of the historic refuge have greater genetic diversity that can be associated with multiple historical refuges and ecological transition from forest to savanna environments. Genetic clusters modeled under current and future climatic conditions, indicate losses and homogenization of genetic variation for the species. The data corroborate the recent population diversification of S. adstringens in the Cerrado, reinforcing the phylogenetic pattern in species of this genus. Beyond, low levels of genetic diversity, reflecting the effects of glacial and interglacial periods in the Pleistocene, suggesting multiple refuges formation. The impact of climate change and the disorderly exploitation of the natural populations of this genetic resource indicate the need for management and conservation plans of the species. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-09-27 |
dc.date.accessioned.fl_str_mv |
2020-01-17T12:06:58Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
BRAGA, R. S. Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas. 2019. 101 f. Tese (Doutorado em Genética e Melhoramento de Plantas) - Universidade Federal de Goiás, Goiânia, 2019. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/10303 |
dc.identifier.dark.fl_str_mv |
ark:/38995/0013000009b76 |
identifier_str_mv |
BRAGA, R. S. Diversificação e radiação recente de Stryphnodendron adstringens (Leguminosae) no cerrado: consequências genéticas frente às mudanças climáticas. 2019. 101 f. Tese (Doutorado em Genética e Melhoramento de Plantas) - Universidade Federal de Goiás, Goiânia, 2019. ark:/38995/0013000009b76 |
url |
http://repositorio.bc.ufg.br/tede/handle/tede/10303 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.program.fl_str_mv |
-6265679607231828330 |
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