Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Federal de Goiás (UFG)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorCollevatti, Rosane Garcia-
Autor(es): dc.creatorSantos, Juliana Silveira dos [UNESP]-
Autor(es): dc.creatorRosa, Fernanda Fraga-
Autor(es): dc.creatorAmaral, Tatiana S.-
Autor(es): dc.creatorChaves, Lazaro Jose-
Autor(es): dc.creatorRibeiro, Milton Cezar [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:57:32Z-
Data de disponibilização: dc.date.available2022-02-22T00:57:32Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-03-25-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3389/fgene.2020.00259-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/209753-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/209753-
Descrição: dc.descriptionChanges 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.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFAPEG-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionUniv Fed Goias, Lab Genet & Biodiversidade, ICB, Goiania, Go, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista, Dept Biodiversidade, Lab Ecol Espacial & Conservacao LEEC, Rio Claro, Brazil-
Descrição: dc.descriptionUniv Fed Goias, Escola Agron, Goiania, Go, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista, Dept Biodiversidade, Lab Ecol Espacial & Conservacao LEEC, Rio Claro, Brazil-
Descrição: dc.descriptionCNPq: 441278/2016-7-
Descrição: dc.descriptionFAPEG: 201710267000331-
Descrição: dc.descriptionCAPES: 88881.068425/2014-01-
Descrição: dc.descriptionFAPESP: 2013/50421-2-
Descrição: dc.descriptionFAPESP: 2019/09713-6-
Formato: dc.format14-
Idioma: dc.languageen-
Publicador: dc.publisherFrontiers Media Sa-
Relação: dc.relationFrontiers In Genetics-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectagroecosystem-
Palavras-chave: dc.subjectBignoniaceae-
Palavras-chave: dc.subjectCerrado-
Palavras-chave: dc.subjectfragmentation-
Palavras-chave: dc.subjectgenetic diversity-
Palavras-chave: dc.subjectlandscape genetics-
Palavras-chave: dc.subjectquantitative genetics-
Palavras-chave: dc.subjectTabebuia aurea-
Título: dc.titleMulti-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.