A Biogeographic Barrier Test Reveals a Strong Genetic Structure for a Canopy-Emergent Amazon Tree Species
| Autor: | Alison G. Nazareno, Christopher W. Dick, Lúcia G. Lohmann |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Population genetics lcsh:Medicine 01 natural sciences Trees Gene flow Cluster Analysis Buchenavia lcsh:Science Phylogeny media_common education.field_of_study Multidisciplinary Ecology Geography biology Amazon rainforest Biodiversity Genomics Phylogeography Genetic structure Brazil Gene Flow Genetic Speciation media_common.quotation_subject Population Allopatric speciation Environment DNA Mitochondrial Polymorphism Single Nucleotide 010603 evolutionary biology Article Evolutionary genetics 03 medical and health sciences Rivers Animals education Alleles lcsh:R Bayes Theorem 15. Life on land biology.organism_classification Speciation Genetics Population 030104 developmental biology Taxon lcsh:Q |
| Zdroj: | Scientific Reports Scientific Reports, Vol 9, Iss 1, Pp 1-11 (2019) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-019-55147-1 |
| Popis: | Wallace’s (1854) Riverine Barrier hypothesis is one of the earliest explanations for Amazon biotic diversification. Despite the importance of this hypothesis for explaining speciation in some animal groups, it has not been studied extensively for plant species. In this study we use a prominent Amazon tree, Buchenavia oxycarpa (Mart.) Eichler (Combretaceae), to evaluate Wallace’s hypothesis along the Rio Negro, a major Amazon tributary that has driven allopatric speciation for several animal taxa. We sampled six individuals from sixteen localities along both river banks, and used a modified ddRADseq protocol to identify SNP markers. Our population genomic data revealed strong genetic structure for B. oxycarpa sampled across banks of the Rio Negro (ϕCT = 0.576, P B. oxycarpa. Our study shows that gene flow for this large and well-dispersed Amazon tree is impeded by riverine barriers, though this has not yet resulted in speciation. Future studies focused on species with different life histories, including species restricted to non-flooded forests, are needed to further advance our understanding of Amazon rivers as drivers of biotic diversification. |
| Databáze: | OpenAIRE |
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