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Article

An Updated Infrageneric Classification of the North American Oaks (Quercus Subgenus Quercus): Review of the Contribution of Phylogenomic Data to Biogeography and Species Diversity

1
Department of Biology, Duke University, 330 Bio Sci Bldg, Durham, NC 27708, USA
2
The Morton Arboretum, Center for Tree Science, 4100 Illinois 53, Lisle, IL 60532, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Mary Ashley and Janet R. Backs
Forests 2021, 12(6), 786; https://doi.org/10.3390/f12060786
Received: 5 May 2021 / Revised: 7 June 2021 / Accepted: 10 June 2021 / Published: 15 June 2021
(This article belongs to the Special Issue Quercus Genetics: Insights into the Past, Present, and Future of Oaks)
The oak flora of North America north of Mexico is both phylogenetically diverse and species-rich, including 92 species placed in five sections of subgenus Quercus, the oak clade centered on the Americas. Despite phylogenetic and taxonomic progress on the genus over the past 45 years, classification of species at the subsectional level remains unchanged since the early treatments by WL Trelease, AA Camus, and CH Muller. In recent work, we used a RAD-seq based phylogeny including 250 species sampled from throughout the Americas and Eurasia to reconstruct the timing and biogeography of the North American oak radiation. This work demonstrates that the North American oak flora comprises mostly regional species radiations with limited phylogenetic affinities to Mexican clades, and two sister group connections to Eurasia. Using this framework, we describe the regional patterns of oak diversity within North America and formally classify 62 species into nine major North American subsections within sections Lobatae (the red oaks) and Quercus (the white oaks), the two largest sections of subgenus Quercus. We also distill emerging evolutionary and biogeographic patterns based on the impact of phylogenomic data on the systematics of multiple species complexes and instances of hybridization. View Full-Text
Keywords: biodiversity; distribution; hybridization; oak; phylogeny; systematics biodiversity; distribution; hybridization; oak; phylogeny; systematics
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MDPI and ACS Style

Manos, P.S.; Hipp, A.L. An Updated Infrageneric Classification of the North American Oaks (Quercus Subgenus Quercus): Review of the Contribution of Phylogenomic Data to Biogeography and Species Diversity. Forests 2021, 12, 786. https://doi.org/10.3390/f12060786

AMA Style

Manos PS, Hipp AL. An Updated Infrageneric Classification of the North American Oaks (Quercus Subgenus Quercus): Review of the Contribution of Phylogenomic Data to Biogeography and Species Diversity. Forests. 2021; 12(6):786. https://doi.org/10.3390/f12060786

Chicago/Turabian Style

Manos, Paul S., and Andrew L. Hipp. 2021. "An Updated Infrageneric Classification of the North American Oaks (Quercus Subgenus Quercus): Review of the Contribution of Phylogenomic Data to Biogeography and Species Diversity" Forests 12, no. 6: 786. https://doi.org/10.3390/f12060786

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