Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.3389/fgene.2020.00259 http://hdl.handle.net/11449/209753 |
Resumo: | Changes in landscape structure can affect essential population ecological features, such as dispersal and recruitment, and thus genetic processes. Here, we analyze the effects of landscape metrics on adaptive quantitative traits variation, evolutionary potential, and on neutral genetic diversity in populations of the Neotropical savanna tree Tabebuia aurea. Using a multi-scale approach, we sampled five landscapes with two sites of savanna in each. To obtain neutral genetic variation, we genotyped 60 adult individuals from each site using 10 microsatellite loci. We measured seed size and mass. Seeds were grown in nursery in completely randomized experimental design and 17 traits were measured in seedlings to obtain the average, additive genetic variance (V-a) and coefficient of variation (CVa%), which measures evolvability, for each trait. We found that habitat loss increased genetic diversity (He) and allelic richness (AR), and decreased genetic differentiation among populations (F-ST), most likely due to longer dispersal distance of pollen in landscapes with lower density of flowering individuals. Habitat amount positively influenced seed size. Seeds of T. aurea are wind-dispersed and larger seeds may be dispersed to short distance, increasing genetic differentiation and decreasing genetic diversity and allelic richness. Evolvability (CVa%) in root length decreased with habitat amount. Savanna trees have higher root than shoot growth rate in the initial stages, allowing seedlings to obtain water from water tables. Landscapes with lower habitat amount may be more stressful for plant species, due to the lower plant density, edge effects and the negative impacts of agroecosystems. In these landscapes, larger roots may provide higher ability to obtain water, increasing survival and avoiding dying back because of fire. Despite the very recent agriculture expansion in Central Brazil, landscape changes are affecting neutral and adaptive variation in T. aurea. Several populations have low additive genetic variation for some traits and thus, may have limited evolvability, which may jeopardize species long-term persistence. The effect of habitat loss on highly variable neutral loci may only be detected after a certain threshold of population size is attained, that could become dangerously small masking important losses of heterozygosity endangering species conservation. |
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Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna TreeagroecosystemBignoniaceaeCerradofragmentationgenetic diversitylandscape geneticsquantitative geneticsTabebuia aureaChanges in landscape structure can affect essential population ecological features, such as dispersal and recruitment, and thus genetic processes. Here, we analyze the effects of landscape metrics on adaptive quantitative traits variation, evolutionary potential, and on neutral genetic diversity in populations of the Neotropical savanna tree Tabebuia aurea. Using a multi-scale approach, we sampled five landscapes with two sites of savanna in each. To obtain neutral genetic variation, we genotyped 60 adult individuals from each site using 10 microsatellite loci. We measured seed size and mass. Seeds were grown in nursery in completely randomized experimental design and 17 traits were measured in seedlings to obtain the average, additive genetic variance (V-a) and coefficient of variation (CVa%), which measures evolvability, for each trait. We found that habitat loss increased genetic diversity (He) and allelic richness (AR), and decreased genetic differentiation among populations (F-ST), most likely due to longer dispersal distance of pollen in landscapes with lower density of flowering individuals. Habitat amount positively influenced seed size. Seeds of T. aurea are wind-dispersed and larger seeds may be dispersed to short distance, increasing genetic differentiation and decreasing genetic diversity and allelic richness. Evolvability (CVa%) in root length decreased with habitat amount. Savanna trees have higher root than shoot growth rate in the initial stages, allowing seedlings to obtain water from water tables. Landscapes with lower habitat amount may be more stressful for plant species, due to the lower plant density, edge effects and the negative impacts of agroecosystems. In these landscapes, larger roots may provide higher ability to obtain water, increasing survival and avoiding dying back because of fire. Despite the very recent agriculture expansion in Central Brazil, landscape changes are affecting neutral and adaptive variation in T. aurea. Several populations have low additive genetic variation for some traits and thus, may have limited evolvability, which may jeopardize species long-term persistence. The effect of habitat loss on highly variable neutral loci may only be detected after a certain threshold of population size is attained, that could become dangerously small masking important losses of heterozygosity endangering species conservation.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)FAPEGCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Fed Goias, Lab Genet & Biodiversidade, ICB, Goiania, Go, BrazilUniv Estadual Paulista, Dept Biodiversidade, Lab Ecol Espacial & Conservacao LEEC, Rio Claro, BrazilUniv Fed Goias, Escola Agron, Goiania, Go, BrazilUniv Estadual Paulista, Dept Biodiversidade, Lab Ecol Espacial & Conservacao LEEC, Rio Claro, BrazilCNPq: 441278/2016-7FAPEG: 201710267000331CAPES: 88881.068425/2014-01FAPESP: 2013/50421-2FAPESP: 2019/09713-6Frontiers Media SaUniversidade Federal de Goiás (UFG)Universidade Estadual Paulista (Unesp)Collevatti, Rosane GarciaSantos, Juliana Silveira dos [UNESP]Rosa, Fernanda FragaAmaral, Tatiana S.Chaves, Lazaro JoseRibeiro, Milton Cezar [UNESP]2021-06-25T12:28:06Z2021-06-25T12:28:06Z2020-03-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article14http://dx.doi.org/10.3389/fgene.2020.00259Frontiers In Genetics. Lausanne: Frontiers Media Sa, v. 11, 14 p., 2020.http://hdl.handle.net/11449/20975310.3389/fgene.2020.00259WOS:000596897700001Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengFrontiers In Geneticsinfo:eu-repo/semantics/openAccess2021-10-23T19:49:59Zoai:repositorio.unesp.br:11449/209753Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T19:49:59Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree |
title |
Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree |
spellingShingle |
Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree Collevatti, Rosane Garcia agroecosystem Bignoniaceae Cerrado fragmentation genetic diversity landscape genetics quantitative genetics Tabebuia aurea |
title_short |
Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree |
title_full |
Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree |
title_fullStr |
Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree |
title_full_unstemmed |
Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree |
title_sort |
Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree |
author |
Collevatti, Rosane Garcia |
author_facet |
Collevatti, Rosane Garcia Santos, Juliana Silveira dos [UNESP] Rosa, Fernanda Fraga Amaral, Tatiana S. Chaves, Lazaro Jose Ribeiro, Milton Cezar [UNESP] |
author_role |
author |
author2 |
Santos, Juliana Silveira dos [UNESP] Rosa, Fernanda Fraga Amaral, Tatiana S. Chaves, Lazaro Jose Ribeiro, Milton Cezar [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Goiás (UFG) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Collevatti, Rosane Garcia Santos, Juliana Silveira dos [UNESP] Rosa, Fernanda Fraga Amaral, Tatiana S. Chaves, Lazaro Jose Ribeiro, Milton Cezar [UNESP] |
dc.subject.por.fl_str_mv |
agroecosystem Bignoniaceae Cerrado fragmentation genetic diversity landscape genetics quantitative genetics Tabebuia aurea |
topic |
agroecosystem Bignoniaceae Cerrado fragmentation genetic diversity landscape genetics quantitative genetics Tabebuia aurea |
description |
Changes in landscape structure can affect essential population ecological features, such as dispersal and recruitment, and thus genetic processes. Here, we analyze the effects of landscape metrics on adaptive quantitative traits variation, evolutionary potential, and on neutral genetic diversity in populations of the Neotropical savanna tree Tabebuia aurea. Using a multi-scale approach, we sampled five landscapes with two sites of savanna in each. To obtain neutral genetic variation, we genotyped 60 adult individuals from each site using 10 microsatellite loci. We measured seed size and mass. Seeds were grown in nursery in completely randomized experimental design and 17 traits were measured in seedlings to obtain the average, additive genetic variance (V-a) and coefficient of variation (CVa%), which measures evolvability, for each trait. We found that habitat loss increased genetic diversity (He) and allelic richness (AR), and decreased genetic differentiation among populations (F-ST), most likely due to longer dispersal distance of pollen in landscapes with lower density of flowering individuals. Habitat amount positively influenced seed size. Seeds of T. aurea are wind-dispersed and larger seeds may be dispersed to short distance, increasing genetic differentiation and decreasing genetic diversity and allelic richness. Evolvability (CVa%) in root length decreased with habitat amount. Savanna trees have higher root than shoot growth rate in the initial stages, allowing seedlings to obtain water from water tables. Landscapes with lower habitat amount may be more stressful for plant species, due to the lower plant density, edge effects and the negative impacts of agroecosystems. In these landscapes, larger roots may provide higher ability to obtain water, increasing survival and avoiding dying back because of fire. Despite the very recent agriculture expansion in Central Brazil, landscape changes are affecting neutral and adaptive variation in T. aurea. Several populations have low additive genetic variation for some traits and thus, may have limited evolvability, which may jeopardize species long-term persistence. The effect of habitat loss on highly variable neutral loci may only be detected after a certain threshold of population size is attained, that could become dangerously small masking important losses of heterozygosity endangering species conservation. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-03-25 2021-06-25T12:28:06Z 2021-06-25T12:28:06Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.3389/fgene.2020.00259 Frontiers In Genetics. Lausanne: Frontiers Media Sa, v. 11, 14 p., 2020. http://hdl.handle.net/11449/209753 10.3389/fgene.2020.00259 WOS:000596897700001 |
url |
http://dx.doi.org/10.3389/fgene.2020.00259 http://hdl.handle.net/11449/209753 |
identifier_str_mv |
Frontiers In Genetics. Lausanne: Frontiers Media Sa, v. 11, 14 p., 2020. 10.3389/fgene.2020.00259 WOS:000596897700001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Frontiers In Genetics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
14 |
dc.publisher.none.fl_str_mv |
Frontiers Media Sa |
publisher.none.fl_str_mv |
Frontiers Media Sa |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1799965016277909504 |