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Article

Resolving the Phylogeny of the Olive Family (Oleaceae): Confronting Information from Organellar and Nuclear Genomes

1
Laboratoire Evolution & Diversité Biologique (EDB, UMR 5174), CNRS/IRD/Université Toulouse III, 118 Route de Narbonne, 31062 Toulouse, France
2
Claude E. Phillips Herbarium, Delaware State University, 1200 N. Dupont Hwy, Dover, DE 19901-2277, USA
3
Institut de Systématique Evolution Biodiversité (ISYEB), Muséum National d’Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier, CP39, 75005 Paris, France
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Genes 2020, 11(12), 1508; https://doi.org/10.3390/genes11121508
Submission received: 25 September 2020 / Revised: 12 November 2020 / Accepted: 11 December 2020 / Published: 16 December 2020
(This article belongs to the Special Issue Oleaceae Genetics)

Abstract

The olive family, Oleaceae, is a group of woody plants comprising 28 genera and ca. 700 species, distributed on all continents (except Antarctica) in both temperate and tropical environments. It includes several genera of major economic and ecological importance such as olives, ash trees, jasmines, forsythias, osmanthuses, privets and lilacs. The natural history of the group is not completely understood yet, but its diversification seems to be associated with polyploidisation events and the evolution of various reproductive and dispersal strategies. In addition, some taxonomical issues still need to be resolved, particularly in the paleopolyploid tribe Oleeae. Reconstructing a robust phylogenetic hypothesis is thus an important step toward a better comprehension of Oleaceae’s diversity. Here, we reconstructed phylogenies of the olive family using 80 plastid coding sequences, 37 mitochondrial genes, the complete nuclear ribosomal cluster and a small multigene family encoding phytochromes (phyB and phyE) of 61 representative species. Tribes and subtribes were strongly supported by all phylogenetic reconstructions, while a few Oleeae genera are still polyphyletic (Chionanthus, Olea, Osmanthus, Nestegis) or paraphyletic (Schrebera, Syringa). Some phylogenetic relationships among tribes remain poorly resolved with conflicts between topologies reconstructed from different genomic regions. The use of nuclear data remains an important challenge especially in a group with ploidy changes (both paleo- and neo-polyploids). This work provides new genomic datasets that will assist the study of the biogeography and taxonomy of the whole Oleaceae.
Keywords: herbarium; museum collection; mitochondrial DNA; plastome; nuclear ribosomal DNA; phytochromes; low-copy genes; taxonomy; polyploidy herbarium; museum collection; mitochondrial DNA; plastome; nuclear ribosomal DNA; phytochromes; low-copy genes; taxonomy; polyploidy

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MDPI and ACS Style

Dupin, J.; Raimondeau, P.; Hong-Wa, C.; Manzi, S.; Gaudeul, M.; Besnard, G. Resolving the Phylogeny of the Olive Family (Oleaceae): Confronting Information from Organellar and Nuclear Genomes. Genes 2020, 11, 1508. https://doi.org/10.3390/genes11121508

AMA Style

Dupin J, Raimondeau P, Hong-Wa C, Manzi S, Gaudeul M, Besnard G. Resolving the Phylogeny of the Olive Family (Oleaceae): Confronting Information from Organellar and Nuclear Genomes. Genes. 2020; 11(12):1508. https://doi.org/10.3390/genes11121508

Chicago/Turabian Style

Dupin, Julia, Pauline Raimondeau, Cynthia Hong-Wa, Sophie Manzi, Myriam Gaudeul, and Guillaume Besnard. 2020. "Resolving the Phylogeny of the Olive Family (Oleaceae): Confronting Information from Organellar and Nuclear Genomes" Genes 11, no. 12: 1508. https://doi.org/10.3390/genes11121508

APA Style

Dupin, J., Raimondeau, P., Hong-Wa, C., Manzi, S., Gaudeul, M., & Besnard, G. (2020). Resolving the Phylogeny of the Olive Family (Oleaceae): Confronting Information from Organellar and Nuclear Genomes. Genes, 11(12), 1508. https://doi.org/10.3390/genes11121508

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