Introgression across evolutionary scales suggests reticulation contributes to Amazonian tree diversity
dc.contributor.author | Schley, RJ | |
dc.contributor.author | Pennington, RT | |
dc.contributor.author | Pérez-Escobar, OA | |
dc.contributor.author | Helmstetter, AJ | |
dc.contributor.author | de la Estrella, M | |
dc.contributor.author | Larridon, I | |
dc.contributor.author | Sabino Kikuchi, IAB | |
dc.contributor.author | Barraclough, TG | |
dc.contributor.author | Forest, F | |
dc.contributor.author | Klitgård, B | |
dc.date.accessioned | 2020-10-09T07:09:25Z | |
dc.date.issued | 2020-09-02 | |
dc.description.abstract | Hybridization has the potential to generate or homogenize biodiversity and is a particularly common phenomenon in plants, with an estimated 25% of plant species undergoing interspecific gene flow. However, hybridization in Amazonia's megadiverse tree flora was assumed to be extremely rare despite extensive sympatry between closely related species, and its role in diversification remains enigmatic because it has not yet been examined empirically. Using members of a dominant Amazonian tree family (Brownea, Fabaceae) as a model to address this knowledge gap, our study recovered extensive evidence of hybridization among multiple lineages across phylogenetic scales. More specifically, using targeted sequence capture our results uncovered several historical introgression events between Brownea lineages and indicated that gene tree incongruence in Brownea is best explained by reticulation, rather than solely by incomplete lineage sorting. Furthermore, investigation of recent hybridization using ~19,000 ddRAD loci recovered a high degree of shared variation between two Brownea species that co-occur in the Ecuadorian Amazon. Our analyses also showed that these sympatric lineages exhibit homogeneous rates of introgression among loci relative to the genome-wide average, implying a lack of selection against hybrid genotypes and persistent hybridization. Our results demonstrate that gene flow between multiple Amazonian tree species has occurred across temporal scales, and contrasts with the prevailing view of hybridization's rarity in Amazonia. Overall, our results provide novel evidence that reticulate evolution influenced diversification in part of the Amazonian tree flora, which is the most diverse on Earth. | en_GB |
dc.description.sponsorship | Natural Environment Research Council (NERC) | en_GB |
dc.description.sponsorship | Genetics Society | en_GB |
dc.identifier.citation | Published online 2 September 2020 | en_GB |
dc.identifier.doi | 10.1111/mec.15616 | |
dc.identifier.uri | http://hdl.handle.net/10871/123167 | |
dc.language.iso | en | en_GB |
dc.publisher | Wiley | en_GB |
dc.relation.url | https://doi.org/10.5061/dryad.k3j9kd53w | en_GB |
dc.rights | © 2020 The Authors. Molecular Ecology published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. | en_GB |
dc.subject | Angiosperms | en_GB |
dc.subject | hybridization | en_GB |
dc.subject | phylogenomics | en_GB |
dc.subject | population genomics | en_GB |
dc.subject | rainforest | en_GB |
dc.subject | speciation | en_GB |
dc.title | Introgression across evolutionary scales suggests reticulation contributes to Amazonian tree diversity | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2020-10-09T07:09:25Z | |
dc.identifier.issn | 0962-1083 | |
dc.description | This is the final version. Available from Wiley via the DOI in this record. | en_GB |
dc.description | The data that support the findings of this study are openly available from online repositories. All raw reads generated with the targeted bait capture and ddRADseq methods are available on the NCBI Sequence Read Archive with the Accession nos SAMN13439069‐SAMN13439140 and SAMN13441804‐SAMN13441974, respectively, under the BioProject number PRJNA592723. All full phylogenomic sequence alignments, single‐accession‐per‐species alignments and tree files, bgc input files, Stacks output files and the Detarioideae bait kit sequence file are found on Dryad (https://doi.org/10.5061/dryad.k3j9kd53w). Data are under embargo until publication, and any further data required are available from the corresponding author upon reasonable request. | en_GB |
dc.identifier.journal | Molecular Ecology | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2020-08-17 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2020-08-17 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2020-10-09T06:58:51Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2020-10-09T07:09:29Z | |
refterms.panel | C | en_GB |
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Except where otherwise noted, this item's licence is described as © 2020 The Authors. Molecular Ecology published by John Wiley & Sons Ltd.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.