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A Biogeographic Barrier Test Reveals a Strong Genetic Structure for a Canopy-Emergent Amazon Tree Species.

ABSTRACT: 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 (?_CT?=?0.576, P?

SUBMITTER: Nazareno AG

PROVIDER: S-EPMC6901565 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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A Biogeographic Barrier Test Reveals a Strong Genetic Structure for a Canopy-Emergent Amazon Tree Species.

Nazareno Alison G AG Dick Christopher W CW Lohmann Lúcia G LG

Scientific reports 20191209 1

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 ...[more]

PMID: 31819128

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